US2311442A - Refrigerator jack - Google Patents

Description

Feb. 16, 1943. c. s. .JoHNsToN REFRIGERATOR JACK Filed May a, 1941 Feb. 16, 1943. c. s. JQHNSTON 2,311,442

REFRIGERAIOR JACK Filed May 8, 1941 8 Sheeis-Sheet 2 Feb. 16, 1943. c. s. JoHNs'roN REFRIGERATOR JACK 8 Sheets-Sheet 5 Filed May 8. 1941 Feb- 16 1943- C. s. JOHNSTON REFRIGERATOR JACK Filed May 8, 1941 8 SheetS-Sheet 4 l Meer/ZM @diz/Zeg Sig/MSM @y x7@ Clbe,

Feb. 16, 1943. C. s. JoHNsT'oN 2,311,442

REFRIGERATOR JACK .Filed llay 8, 1941 8 Sheets-Sheet 5 y y e Cia@ #M @QM 8 Sheets-Sheet 6 y Feb. 16, 1943. c. s. JoHNsToN REFRIGERATOR JACK Filed May 8, 1941 Feb. 16, 1943.

c, s. JQHNSTCDN REFRIGERATOR JACK 8 Shees-Sheet '7 Filed May 8, 1941 .All III I Meza-Zeer 8 Sheets-Sheet 8 C. S. JOHNSTQN REFRIGERATOR JACK Filed May 8, 1941 Feb. 16, 1943.

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Patented Feb. 16, 1943 REFRIGERATOR J ACK Charles S. Johnston, Glencoe, Ill., assignor to Transportation Specialties Company, Chicago,

Ill.,

a. corporation of Iliinois Application May 8, 1941, Serial No. 392,513

27 Claims.

The present invention relates to refrigerator jacks, and is particularly concerned with jacks for refrigerators adapted to be used for less than carload shipments of perishable products.

One of the objects of the invention is the provision of an improved refrigerator, having means for facilitating its movement into such a position in a railway freight car that a multiplicity of the refrigerators may be so arranged in the car as to utilize the space most effectively.

Another object of the invention is the provision of an improved refrigerator for less than carload shipments of perishable products, which is adapted to be handled as a unit so that it may be placed in a railway freight car as such, and it may be removed from the car by means of its associated equipment, and delivered as a unit with its perishable products intact and in good condition.

Another object of the invention is the provision of an improved supporting structure for refrigerators of the class described, by means of which the refrigerator is adapted to be held in relatively xed position in the car by virtue of its weight and the engagement of its lower structure with the floor of the car and by means of which the refrigerator is adapted to be loaded or unloaded as a unit without necessity for using other wheeled vehicles.

Another object of the invention is the provision of an improved jacking arrangement for refrigerator units by means of which the refrigerator may be supported upon one or more wheels, or it may be permitted to come to rest upon legs which will engage the oor and hold the refrigerator in relatively xed position with respect tothe car floor or other support upon which it is located.

Another object of the invention is the provision of an improved jacking arrangement of the class described, by means of which the elements of the jack may be latched in such position that the adjacent portion of the refrigerator is supported upon wheels or the elements may be unlatched and the weight of the refrigerator deposited on legs which engage the oor.

Another object of the invention is the provision of an improved jacking arrangement which is adapted to be moved into such a position underneath the refrigerator that there are substantially no projecting parts which might interfere with the close packing of the refrigerator units in a. storage "space, such as a freight car or a warehouse.

Another object of the invention is the provision of a refrigerator unit having a jacking arrangement provided with a handle by means oi' which the weight of the refrigerator may be transferred to wheels and the unit may be moved about, and in which the handle and jacking arrangements are adapted to be movably mounted so that they can be moved into an inoperative position where the handle will not interfere with the location of other units in such manner as to use all of the storage space available.

Other objects and advantages of the invention will be apparent from the following description and the accompanying drawings, in which similar characters of reference indicate similar parts throughout the several views.

Referring to the accompanying drawings, of which there areI eight sheets:

Fig. 1 is a front elevational view of a refrigerator unit embodying the invention:

Fig. 2 is a side elevational View of the embodiment disclosed in Fig. 1;

Fig. 3 is a rear elevational view;

Fig. 4 is a diagrammatic plan view of a railway freight car in which a plurality of the refrigerator units have been so arranged as to utilize the space available most effectively;

Fig. 5 is a fragmentary vertical sectional view, taken on the plane of the line 5 5 oi' Fig. 6, looking in the direction of the arrows, showing the details of construction of a jacking 'arrangement for one end of the refrigerator unit;

Fig. 6 is a fragmentary front elevational view of the jacking arrangement of Fig. 5;

Fig. 7 is a view similar to Fig. 5, with the parts in the position which they assume in the beginning of the lifting movement of the jack;

Fig. 8 is a view similar to Fig. 5 of the jacking mechanism in the position which it assumes at the end of the lifting movement of the jack, with the mechanism latched;

Fig. 9 is a simplified diagrammatic fragmentary sectional view, showing the parts of the jack mechanism in the position of Fig. 5, with certain of the elements omitted for the purpose of clarity, taken on the plane of the line 8 9 of Fig. 6, looking in the direction of the arrows;

Fig. 10 is a view similar to Fig. 9, taken on the plane of the line i-i of Fig. 6, showing other details of structure of the parts;

Fig. 11 is a sectional view, taken on the plane of the line iI-li of Fig. 6, looking in the direction of the arrows;

Fig. 12 is a sectional view, taken on the plane of the line l2-i2 of Fig. 5, looking in the direction of the arrows;

Fig. 13 is a fragmentary sectional view, taken on the plane of the line |3|3 of Fig. 5, looking in the direction of the arrows;

Fig. 14 is a fragmentary sectional view, taken on the plane of the line |4|4 of Fig. 5, looking in the direction of the arrows;

Fig. 15 is a fragmentary sectional View of a part of the handle structure, taken on the plane of the line |5|5 of Fig. 2, looking in the dlrection of the arrows; A

Fig. 16 is a transverse sectional view of the handle, taken on the plane of the line |6|6 of Fig. 15, looking in the direction of the arrows;

Fig. 17 is a sectional view, taken on the plane of the line |1-I1 of Fig. 1, looking in the direction of the larrows.

Referring to Fig. 1, 20 indicates one of a plurality of refrigerator umts which are preferably made of such size that a given number of the units will substantially ll a railway freight car of standard size; for example, those of Fig. 4, indicated by the numerals 2li- 21, being shown in a standard railway car 28, which may be completely filled, if desired, by locating one additional unit in the remaining space 29.

Thus the refrigerator units are preferably of such width that two of them arranged side by side will use substantially all of the space in one end of the car, with some clearance between each of the units and the walls and between the two units themselves.

The refrigerator units are preferably made longer than they are wide, and the height is preferably sulcient to permit the hanging of meat, such as quarters of beef, etc., from a rack carried in the top of the iuiit.

v'The refrigerator unit preferably comprises a pair of complete and separate metal shells, one on the inside, and the other on the outside, separated and insulated by layers of rigid insulation under compression, so that there is no metal-tometal contact between the inner and outer metal layers, and the interior of the unit is well insulated.

Each unit is provided with a front door opening 30, closed by a door 3| of the same construction, having inner and outer metal layers insulated from each other in the same way, the door being supported by means of the hinges 32 and locked by means of the locks 33.

The refrigerator is provided with a metal container for receiving a refrigerant, such as solid carbon dioxide, and the container preferably has only a predetermined area exposed to the air inside the refrigerator, the balance of the area of the container being insulated so as to limit the use of the solid carbon dioxide and extend its use over a long period of time.

The detailed structure of my refrigerator unit is made the subject of a separate application for patent, filed June 11, 1941, Serial No. 397,557.

The supporting framework of the refrigerator unit; preferably comprises four inwardly open channel members 34, 35, 36, 31 arranged in a rectangle, with their flanges extending inwardly, the corners being welded together.

The rectangular framework comprising the open channel members 34, 35, 36, 31 is preferably longer than it is wide as indicated by the length shown in Fig. 2 and shown in Fig. 1 and this framework preferably supports a pair of oppositely turned channel members 54, serving as a guideA for the front wheels and jack. The guide channels 54, 55 (Fig. 6) have their ends secured at one end to the channeled member 3B by welding and at the other end to the channeled member 31 by welding. Channeled guide me bers 54. 55 have their horizontal flanges 56, 51 slightly spaced from each other as shown in Fig. 6.

The rear wheels are adapted to lbe supported by a pair of transversely extending channeled members 38 (Fig. 2). Each of these transversely" extending channeled members has horizontally extending attaching flanges 39 and 40 and each of these channeled members 36 extends from the side frame member to one of the guide channels 54 or 55. Thus each channeled member 98 for supporting the rear wheels has one end secured to a side frame member such as 34 and the other end secured to a channeled member such as 54. the other one being secured to side frame member 35 and channeled member 55 by welding or other convenient fastening means.

These attaching flanges may be secured to the horizontal flange 4| of a wheel frame 42 by means of screw bolts 43, passing through the flanges 39. 40 and 4|.

Each wheel frame may be identical in structure and may comprise the upper attaching flange 4|,

a pair of depending bearing flanges 44, each hav.

ing an aperture 45 for a pintle 46. rPhe pintle 48 passes through the bearing of a metal wheel 41, having a, relatively wide bearing surface at its periphery, and the pintle 46 may be riveted over at its ends.

A plurality of the wheels 41 and wheel frames ,42 are preferably located adjacent the rear end of the refrigerator unit, but slightly spaced therefrom, as shown in Fig. 2. At its forward corners, below the door 3|, the supporting frame for the refrigerator unit is preferably provided with a pair of legs 48, 49.

Each of these legs may comprise a pair cf flanges 50, 5| at right angles to each other, and the flanges may taper in width toward the bottom of the leg. At the top the flanges 50, 5| engage the outside of the channels 34, 36 and 36, 35, to which they are welded along each of the edges of the channels and of the leg flanges so as to secure the legs firmly to the lower frame.

The legs 48, 49 are of such length that when the refrigerator is supported upon them its floor is in substantially level position. By means of the engagement of the lower flanges of the legs 48, 49 with the car floor, the refrigerator unit is prevented from rolling in the freight car and is held in relatively fixed position. The unit is relatively heavy, and therefore the legs have firm engagement with the floor.

The refrigerator unit is preferably provided with a jack so attached to the unit that it may be utilized in the position of Fig. 5, or it may be moved into a storage position, under the unit. This jack is indicated in its entirety by the numeral 52, and it is provided with a jack handle 53. The jack may be slid backward under the refrigerator when not in use.

For this purpose the lower framework of the refrigerator unit, comprising the channels 34--31, is provided with a pair of horizontally extending channelled members 54, 55. These channelled members may extend the full length of the lower frame and may have their ends secured to the channelled members 36, 31 by welding.

The channelled` members 54, 55 have their flanges extending toward each other, and the lowermost of these flanges, indicatedl by the numerals 56, 51, are adapted to serve as guides for a slider, indicated in its entirety by the numeral 58.

The slider 58 is adapted to provide a support for a pair of pivoted wheels` 59, 60 and for tlf-e jack, indicated in its entirety by the numeral 52 (Fig. 2). 'I'he slider 58 comprises a main body plate 6 I, which may be of substantially rectangular shape, and which is located below the guide flanges 56, 51. At its rear or left end in Fig. 5, the slider plate 6| is provided with a pair of apertures 62 for receiving a pair of screw bolts 63, 64. These bolts pass through the apertures 62 and through a rectangular spacer block 65, which is provided with a pair of registering apertures, andthe bolts also pass through an upper bearing plate 66, having registering apertures.

The spacer block 65 is preferably of a greater thickness than the thickness of the lower guide flanges 56, 51 of the channelled members 54, 55, so that there is a clearance, indicated by the space shown in Fig. 6, at 61.

The spacer block is of suflicient width to be slidably received between the ilanges 56, 51, with a suitable clearance, while the bearing plate 66 is of the same width, but of greater length, and overhangs the guide flanges 56, 51, as shown in Fig. 6.

The members 6|, 65, 66 are preferably secured together tightly by means of the bolts 64, 63 and spring washers, as shown in Figs. and 14.

Referring to the opposite end of the slider plate 6|, they are also provided with a pair of apertures for receiving the bolts 68, 69 (Fig. 14), which again pass through a similar bearing plate 1|), overhanging the guide flanges 56, 51.

A similar spacing block 1| is secured in a similar way by means of the bolts 68, 69, and the members 18 and 1| are flxedly secured together by means of nuts on the ends of the bolts 68, 69.

In this case the apertures for the rivets 68, 69 are disposed forwardly of the center line of the bearing plate 10 and spacer block 1| in order to provide space for a larger series of registering bores 13, 14, (Fig. 5.) These bores are adapted to receive the pivot bolt 16 by means of which the wheel frame, indicated at 11, is pivotally mounted on the slider 58.

The wheel frame 11 preferably comprises an upper bearing plate 18, having a plane surface adapted to be slidably engaged with the lower plane surface of the slider plate 6|. The bearing plate 18 likewise has a centrally located aperture, which may be provided with a bearing bushing 19 for receiving the pivot bolt 16.

The pivot bolt 16 is provided with a washer 80, engaging its head and engaging below the bearing plate 18, and at its upper threaded end with a. nut 8| secured in place by means of a cotter pin 82 engaging the shoulders of a slot in the nut 8| and passing through an aperturein the bolt 16.

The wheel frame 11 carries the front wheels 59, 60 and the structure of the jack 52, and the jack is adapted to be used in the position of Fig. 5, or it may be shoved back under the refrigerator, the refrigerator being supported by its legs 68, 4S, in the position of Fig. 2.

The slider 58 supports the wheels and jack in such manner that the entire assembly of slider, jack, and wheels may be slid on the guides 56, 51 from the front position of Fig. 5 to the rear position (not shown). During this sliding movement the carriage is suspended from the guide flanges 56, 51 in the position of Fig. 6, the clearance 61 being below the guide flanges 56, 51, but the wheels rest on the floor.

The guide anges 56, 51 are preferably provided with stop means for automatically securing the jack in the forward position of Fig. 1 or Fig. 5, while the jack is being used.

This stop means comprises one or more stop members 83 (Fig. 2) carried by the guide flanges 56, 51, and of less width than the clearance at 61. The stop member 83 depends below the guide flanges 56, 51 so that when the wheels and jack depend from the guide anges 56, 51 the slider may be slid backward without engaging the stop members 83.

When, however, the wheels 59, 60 engage the floor and support the weight of the jack, and

the bearing plate 6| is moved 4up into engage-- ment with the lower surfaces of the guide flanges 56, 51, the slider 58 is, prevented from moving backward because the slider plate 58 will engage the stop member 83.

Thus, whenever the refrigerator is supported upon its forward wheels, the slider, with the jack and pivotally mounted wheels, is pivotally secured in its forward position. There is no possibility that a push on the jack and forward wheel frame will cause the wheels to recede under the refrigerator at this time because of the engagement with the stop member 83.

Referring to Fig. 6, the plate of the wheel frame 11 is preferably provided with a pair of depending flanges 84, 85, comprising a -pair of metal plates, having their upper edges secured to the bearing plate 18 by welding or otherwise.

These depending flanges 84, 85 are parallel to each other, and they may be secured together at the front straight edge `by means of a transverse plate 86, welded to the bearing plate 18 at the top and at both lateral edges to the depending anges 84, 85.

The rear edge of each of the depending flanges 86, 85 may be straight, as indicated at 81; but the lower outline is slightly irregular, as indicated at 88, to provide suitable clearance between these depending flanges and the wheel shaft 88, further to Ibe described.

At their lower rear corners the depending flanges 86, 85 are provided with a pair of aligned apertures `96 for receiving the stub shaft 8 which may have a cotter .pin 32 in each end inside the flanges 84, 85. The stub shaft 9| pivotally supports a foot latch, indicated at 93 (Fig. 5).

The foot latch 93 may comprise a pair of elonv,

gated metal plates 94, 95 secured in spaced relation and parallel to each other, by means of the foot-engaging plate 96, which is welded to the upper edges of the plates 98, 95 and curves downward over the curved end 81 of the plates `94, 86.

A downwardly turned ange 98 of this foot plate also serves to hold the plates 94, 96 in parallel relation, being welded to them.

The main body of the foot latch plates 94, 95 tapers in width from a latcliing shoulder 88 to the curved end surface 91. The latching shoulder 89 extends substantially transversely to a radial line drawn from the center of the shaft 8| to the surface 98, but is preferably provided with a slight angular divergence from the tangential position, as will be observed by the eye in Fig. 5.

The relatively straight latching shoulder l88 forms .part of a curved partially circular recess the latlching plates 9d, 95 and the recess o a s table size r the -Wheel shaft 88. to eceive a portion of From the recess |66 the latchin lat i increase in width toward the leftgerid iis geg?? to provide suillcient body for the bearing apertures S0. A spring supporting plate im extends l1mi: plates los, los mg. s).

transversely 'between the two latching plates 94, 99, and is welded to both of them and is provided with an aperture |02 for receiving the hook end of a helical spring |03.

The opposite end of the spring |03 is hooked into an aperture in an angle bracket |04, which is welded to the lower rear side of the bearing plate 18 (Fig. 5). The spring |03 is under initial tension, and it urges the foot latch 93 upward to the .position of Fig. 5, so that it is -urged into latching position, -but may be released by means of -foot pressure on the foot plate 96.

The two depending plates 84, 85 are also provided with a pair of aligned apertures |05 (Fig. 5) located forwardly of each plate, and approximately midway between the upper and lower parts of the plate.

These apertures rotatably support a stub shaft |06, which has cotter .pins |01 ypassing through each end of the shaft, inside each of the depending flanges 84, 85, to retain it against axial movement.

The stub shaft |06 pivotally supports a pair of Each link plate |08, |09 isprovided with an aperture at its rear end for receiving the stub shaft |06., At its for- Ward end each link plate is provided with an aperture for receiving the wheel shaft 89.

Thus the wheel shaft 89 is supported by the wheel frame 11 through the intermediary of the pivotally mounted links 08, |09 so that the wheels may move to theposition of Fig. 5, where they merely rest on the floor, but support no weight other than that of their associated parts, or the position of Fig. 8, in which the links |08, |09 are lpivoted downward, and the wheels support the refrigerator.

The link plates |08, |09 comprise elongated flat metal plates with straight sides and semi-circular ends.

The wheel shaft 89 is of sumcient length to extend beyond the depending anges 84, 85 at each side through parts of the handle to support the wheels 59 and 60 at each end of the shaft 89.

Each end may be threaded and provided with a suitable washer and nut ||0, secured in place by means of a cotter pin ||2 passing through the shaft. The wheels 59, 60 are preferably standard truck wheels provided with roller bearings for supporting the wheels on the shaft in order that the refrigerator unit may be moved with a minimum amount of effort.

In the same manner the wheels 41 at the rear of the refrigerator unit may be provided with roller bearings supporting the wheels on the shafts 46.

The wheel shaft 89 also supports the handle 53, which will now be described in detail. The handle 53 is preferably constructed of a pipe or tubular metal member ||3 at its upper end, the pipe being welded to the` parallel attaching flanges ||4 of a pair of metal legs ||5, ||6.

The legs ||5, ||6 are bent out at ||1 to extend outwardly from each other and are bent again into parallel relation at ||8 (see Fig. 1). These legs comprise elongated metal plates, which are of the same width throughout the major portion of their length, but are widened at the lower end, as indicated by the outwardly curved outline at ||9 in Fig. 5.

Each of the legs ||5, ||6 is provided at the rear part of its enlargement with an aperture |2| for receiving the wheel shaft 89. The shape of the aperture |2| is best shown in Fig. 9, and

this aperture may be said to be of substantially a flattened heart shape. The aperture |2| is formed at the top with a pair of downwardly open recesses |22, |23, separated by a rounded point or hump |24.

The recesses |22, |23 are of substantially the same curvature as the wheel shaft 89, which they are adapted to receive. The lower part of the aperture |2| is curved on a larger radius so as to join the circular portions |2|, |22 at the bottom with a more gradually curved portion |25, which is spaced sufficiently from the hump |24 to permit the wheel shaft 89 to move from the recess |22, pasthump |24, to the recess |23.

The enlargement |20 of the handle legs IIS, ||6 is also provided with what may be termed a radial extension with respect to the shaft 89, when it is located in the recess |23, this extension being indicated at |26.

The extension |26 is formed with an upwardly open circular groove or recess |21 adapted to fit or receive the stub shaft |06 (Fig. 9), on which the links |08, |09 are pivoted. The relation of the parts and the length of the links |08, |09 is such that when the handle has its aperture |2| so disposed that the wheel shaft 89 is in the recess |22, the handle may be pivoted downward or upward, and the curved edge |28 of the extension |26 is adapted toclear the stub shaft |06. Thus the handle may be pivoted as desired, and held at any desired height, without bringing the shoulder or recess |21 into engagement with the stub shaft |06.

When the handle legs H5, ||6 have their apertures |2| disposed in such a position that the wheel shaft 89 is in the recess |23, then a pivotal movement of the handle on the wheel shaft will bring the recess |21 into engagement with the stub shaft |08 in the manner shown in Fig. 'l for the purpose of usingthe handle as a jack handle in a manner further to be described.

At its upper end the handle 53 is provided with a transverse bore |3|, having a metal tube or pipe |30, which has a tight frictional fit in the bore |3| and serves as a hand grip. The handle (Figs. 2 and 15) is also provided with a longitudinally extending slot |32 in the right side of the pipe I3 (Fig. 1) adapted to receive and guide a rod |33, which serves as the handle for a shift lever rod |34, located in the pipe ||3 of the handle 53.

The rod |33 is threaded into a threaded bore |35 in a guide block |36, which is welded to the upper end of the rod |34. The rod |34 is bent laterally at |31 (Fig. l), where it emerges from the pipe I3, and has the attaching flange |38 of danother leg or rod Welded to it, just above this en The two legs |39 of the rod |34 then extend diagonally outward, and are bent `again at |40 into parallel relation, so that they are located just inside the legs ||5, ||6 of the handle. The two legs |4|, |42 of the rod |34 are bent inwardly at |43 toward each other (Fig. 6), and the end of each rod is provided with an aperture |44 for receiving a cotter pin |45 and washer |46 to retain the rod in the bore |41 of shift lever |48.

The arrangement at each side of the handle is the same, and the other shift lever has been indicated by the numeral |49 (Fig. 6). One of the shift levers |48 is shown in elevation in the section of Fig. 10, and each of these shift levers |48, |49 comprises a substantially triangular metal plate, the three sides-being `indicated by the numerals |50, |I, |52.

Each shift lever is provided with a bore |53 located in the upper -corner of the shift lever,

and the shift lever is pivotally mounted on the enlargement |20 of the handle leg ||5 by means of the cap screw |54, having head |55.

Each shift lever |48, |49 is provided with an oblong aperture |56 (Fig. 10) formed by the two straight sides |51, |58, having the half circular ends |59, |60. The size of these circular ends and the spacing between the at sides of the oval aperture |56 is sumcient so that the wheel shaft I9 may pass through the oval aperture |56 of each shift lever |48, |49.

The shift levers las, |49 are each providedwith an oiset 8| (Fig. 10) by means of which the rods I4 I l 42 may be located immediately adjacent the handle legs ||5, ||6, and the shift levers |49, |49 may alsobe pivoted on the handle legs ||5, ||6 and pivotally engaged with the rods |4|, |42.

The operation of the jack in thelifting of the front end of the refrigerator unit vis as follows: 'Ihe jack is drawn forward as far as possible on the guide flanges 56, 51 to the position of Fig. 1. Ordinarily the parts of the jack will at this time be in the position of Fig. 5, and the relation oi the parts at this time is such that the handle 53 may be moved pivotally on the wheel shaft 89, located in recess 2 of each handle leg, to any desired elevation. Assuming the refrigerator has been jacked up on its front Wheels, the handle may be disposed in vertical position, or it may be pivoted downwardly until the handle bar |30 is at the desired elevation for the operator, who expects to pull or push the refrigerator from place to place.

As the recesses |22, |23 are disposed in the upper side of the handle enlargement |20 and there is a hump |24 between them, the handle tends to remain by gravity in whichever position it happens to be with respect to the location of the wheel shaft 89 in recess 22 or |23. y

The same is true of the handle with respect to the location of the shaft 89 in recess |22 when the handle is pivoted downward, out of engagement with the jack mechanism. Then the weight of the pivoted end of the handle keeps the wheel shaft 89 in the left end of the recess |22. It is only by means of the shifting levers |48, |49 pivoted on the handle and acting against the wheel shaft that the handle may be shifted at will from one recess |22 to the other |23.

'I'he oblong slot |56 in the shift lever is required to provide suitable clearance for the wheel shaft as it is moved by the shift lever from one recess to the other.

The handle may be moved downward to the horizontal position, as shown in Fig. 8, and the jack may be slid under the refrigerator on the guides 56, 51. At this time the refrigerator is resting at itsv forward end onthe legs 48, 49.

The shift lever links being in their uppermost position in Fig. 5, these shift levers |48, |49 tend to confine the Wheel shaft 89 in the recesses |22 (Fig. 9) of the ,handle enlargement |20. When it is desired to jack up the refrigerator, the shift levers |48, |49 may be pivoted in a counter-clockwise direction with respect to the handle legs, by pulling upward on the handle rod |33.

The two legs I4 |42 of this connecting rod will then move the shift levers |48, |49 clockwise on the handle legs from the position of Fig. 5 to that of Fig. 7. This causes the wheel shaft 89 to .be

|22 (F18. 9) to the new position of Fig. 7 in the recess |23 (Fig. 9).

In effect, the moving of the shift lever moves the lower end of the handle in a horizontal direction on the wheel shaft 89. 'I'he recess |21 (Fig. 9), which is disposed in Fig. 5 in such position radially of the wheel shaft 09 that it will miss the stub shaft |06, thus becomesmoved to the position of Fig. 7, where a pivotal movement of the handle on the wheel shaft 89 causes the recess |21 to engage the stub shaft 06.

The stub shaft |06 provides a pivotal mounting for the links |08, |09 on the Wheel frame 11,

shifted from its position in Fig. 5 in the recess 7 which is attached to the lower part of the refrigerator by means.of the pivot bolt 16. If the handle 53 is then moved in the direction of the arrow in Fig. 7, the handle will be caused to bear `down on the wheel shaft 89 at the recess |23 of the handle enlargement |20 and to bear up on the stub shaft |05, and the refrigerator unit, by means of the groove |21. The handle is now in position to pry the refrigerator upward, using the wheel shaft as a point of pivotal movement. 'I'he continued downward movement of the handle 53 from the position of Fig. '1 to a horizontal position of the handle will eventually bring the links |08, |09 into approximate vertical position, as shown in Fig. 8, at which time the weight of the refrigerator has been lifted from the legs 48, 49 and transferred to the wheels 59, 60.

When the links |08, |09 have pivoted downward to such a position that the Wheel shaft 89 moves from the position of Fig. 7 to that of Fig. 8, where it is disposed in the recess |00 of the foot latch levers 93, these latching levers will be moved upward by the spring |03 until the shoulder 99 engages the wheel shaft 89 to hold the wheel shaft in that position.

Thereafter the handle 53 may be lifted at its handle bar |30, and the wheel shaft will be retained in the latched position of Fig. 8 by the foot latch 93. As the handle is lifted by means of its cross bary |30, the enlargement |20 will have its recess |21 withdrawn by counterclockwise rotation from the stub shaft |05.

The prying pressure, which has kept the handle enlargement |20 in such position that the wheel shaft engages in recess |23, being held there by the hump |24 and the engagement of the stub shaft |06 in recess |21, is relieved, and the enlargement |20 of the handle then drops on the wheel shaft from the position in which the wheel shaft is in the recess |23 to the position of Fig. 8, where the wheel shaft is in the recess |22 of the heart-shaped aperture 2| in the handle enlargement |20.

Now the handle may be pivoted to any desired position without affecting the jack, and the refrigerator unit is supported. on pivot wheels in front and on the plurality of wheels at the rear, and it may be maneuvered like any truck, by means of the handle.

After the truck has been moved into the desired position in the freight car or in any other storage space, the weight of the refrigerator may be removed from the front wheels 59 and 60 and placed on the legs 48, 49, irrespective of the position of the handle by merely stepping on the foot pedal 99.

This will cause the clockwise movement of the foot latch 93 from the position of Fig. 8 to that of Fig. 5, and 'the wheel shaft 89 may move forward from the position of Fig. 8 to that of Fig. 5. As the wheel shaft moves forward, the front end of the refrigeratorunit moves downward with thestub shaft |06, the links |08, |09 pivoting counterclockwise. The handle itself is not affected because it has its enlargement in the position of Fig. 8, where the wheel shaft 89 is in the recess I 22 and the prying shoulder |21 has been moved radially away from the stub shaft |08.

The unlatching of the jack cannot react against the handle and give the handle a push because the handle is disconnected from the lifting part of the jack through the previous radial movement of recess I 21 away from stub shaft |03 to the position of Fig. 8.

It will thus be observed that I have invented an improved refrigerator unit which is adapted to be used for less than car shipments of perishable goods. The refrigerator unit is provided with a jacking arrangement by means of which the weight may be lifted from` the legs, which are provided for the front of the unit, and a car may be loaded very quickly or may be unloaded very quickly.

The jacking arrangement does not take up any space in the car because the :lack may be slid backward under the refrigerator into a position where it does not take up any more space than that which the refrigerator unit occupies.

The jack is automatically retained in its forward position when weight is applied to it, but is free to be moved backward when the weight is removed from it. The handle of the jack is adapted to be pivoted freely when the weight is supported on the wheels of the jack or on the front legs of the refrigerator unit.

The weight may be removed from the wheels by merely stepping on the foot pedal of a latch, and there is no possibility of the weight reacting against the handle because at that time the handle has been moved out of operative engagement with the jack mechanism.`

The structure of the unit is sturdy, capable of economical manufacture, and adapted to be used for a long period of time without necessity for repair or replacement.

There is no possibility of the jack becoming lost because it is permanently attached to the refrigerator unit.

While I have illustrated a. preferred embodiment of my invention, many modifications may be made without departing from the spirit of the invention, and I do not wish to be limited to the precise details of construction set forth, but desire to avail myself of all changes within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States, is:

1. In a ,.portable refrigerator unit, the combinationuof a refrigerator provided with wheels for supporting one side of the refrigerator and with legsv for supporting the other side, with a jack unit slidably mounted on said refrigerator unit, said jack unit including a jack, wheels for supporting the jack, and a handle for actuating the jack, said refrigerator unit having guide means extending along its bottom for slidably supporting the jack, and stop means carried by said guide means and adapted to engage a part of said jack, whereby the jack is prevented from sliding when it is brought into lifting relation with said refrigerator unit.

2. In a portable refrigerator, the combination of asupporting base, said base being provided with a pair of frame members having horizontally extending opposed guide flanges, a slider member slidably mounted between said guide flanges and carrying a Wheel support, said wheel support having a depending frame member, a wheel supporting link pivotally mounted on said depending frame member, anda wheel carried by the other end of said link, and force-multiplying means for moving the wheel supporting end of said linkin a downward direction and the other end of 'said link in an upward direction to take the weight of said refrigerator unit from said wheel and stop means carried by said guide flanges for engaging said slider and preventing its sliding movement when said wheel bears the weight of said refrigerator unit.

3. In a portable refrigerator, the combination of a supporting base, said base being provided with a pair of frame members having horizontally extending opposed guide flanges, a slider member slidably mounted between said guide flanges and carrying a wheeled support, said wheeled support having a depending frame member, a wheel-supporting link pivotally mounted on said depending frame member, and a wheel Acarried by the other end of said link, and force-multiplying means for moving the wheel supporting end of said link in a downward direction, and the other end of said link in an upward direction to take the Weight of said refrigerator unit from said wheel ,and stop means carried by said guide flanges for engaging said slider and preventing its sliding movement when said wheel bears the weight of said refrigerator unit, said force-multiplying means comprising a handle pivotally mounted at substantially the same center of pivot as said wheel, and a shoulder carried by said depending frame member for engagement with a shoulder on said handle, whereby the handle may be used to pry said link in the direction mentioned above.

4. In a portable refrigerator, the combination of a supporting base, said base being provided with a pair of frame members having horizontally extending opposed guide flanges, a slider member slidably mounted between said guide flanges and carrying a wheeled support, said wheeled support having a depending frame member, a wheel-supporting link pivotally mounted on said depending frame member, and a wheel carried by the other end of said link, and force-multiplying means for moving the wheel supporting end of said link in a downward direction, and the other end of said link in an upward direction to take the weight of said refrigerator unit from said wheel and stop means carried by said guide flanges for engaging said slider and preventing its sliding movement when said wheel bears the weight of said refrigerator unit, said force-multiplying means comprising a handle pivotally mounted at substantially the same center of pivot as said wheel, and a shoulder carried by said depending frame member for engagement with a shoulder on said handle, whereby the handle may be used to pry said link in the direction mentioned above, and latching means for holding said link and wheel in position to support the weight of said refrigerator unit.

5. In a portable refrigerator, the combination of a. supporting base, said base being provided with a pair of frame members having horizontally extending opposed guide flanges, a slider member slidably mounted between said guide flanges and carrying a wheeled support, said wheeled support having a depending frame member, a wheel-supporting link pivotally mounted on said depending frame member, and

a wheel carried by the other end of said link, and force-multiplying means for moving the wheel supporting end of said link in a downward direction, and the other end of said link in an upward direction to take the weight of said refrigerator unit from said wheel and stop means carried by said guide flanges for engaging said slider -and preventing its sliding movement when said wheel bears the weight of said refrigerator unit, said force-multiplying means comprising a handle pivotally mounted at substantially the same center of pivot as said wheel, and a shoulder carried by said depending frame member for engagement with a shoulder on said handle, whereby-the handle may be used to pry said link in the direction mentioned above, said shoulder on said depending frame member comprising a stub shaft for pivotally supporting said link 6. In a refrigerator unit, the combination of a refrigerator with a jack carried by said refrigerator unit and having wheeled means carried by the jack for supporting the refrigerator unit, said jack including a depending frame member carried by the refrigerator unit and having a transverse shaft, a wheel supporting link having one Aend mounted on said shaft and having its other end mounted on a wheel shaft, a wheel carried by said wheel shaft, and a handle pivotally mounted lon said wheel shaft, said handle having an enlarged aperture surrounding said wheel shaft and having a lifting shoulder whereby the handle may be moved on said wheel shaft into position to bring said shoulder into engagement with the first-mentioned shaft to effect a lifting of the refrigerator unit or the handle may be moved into another position with the shoulder retracted from the first-mentioned shaft for free pivotal movement of the handle.

'7. In a refrigerator unit, the combination of a refrigerator with a jack carried by said refrigerator unit and having wheeled means carried by the jack for supporting the refrigerator unit, said jack including a depending frame member carried by the refrigerator unit and having a transverse shaft, a wheel supporting link having one end mounted on said shaft and having its other end mounted on a wheel shaft, a wheel carried by said wheel shaft, and a handle pivotally mounted on said wheel shaft, said handle having an enlarged aperture surrounding said wheel shaft and having a lifting shoulder whereby the handle may be moved on said wheel shaft into position to bring said shoulder into engagement with the Erst-mentioned shaft to effect a lifting of the refrigerator unit or the handle may be moved into another position with the shoulder retracted from the first-mentioned shaft for free pivotal movement of the handle, and means oarried by the handle and acting on said wheel shaft for effecting a lateral shifting of the end of said handlefrom one position to the other.

8. In a refrigerator unit, the combination of a refrigerator with a jack carried by said refrigerator unit and having Wheeled means carried by the jack for supporting the refrigerator unit, said jack including a depending frame member carried by the refrigerator unit and having a transverse shaft, a wheel supporting link having one end mounted on said shaft and havingr its other end mounted on a wheelshaft, a wheel carried by said wheel shaft, and a handle pivotally mounted on said wheel shaft, said handle having an enlarged aperture surrounding said wheel shaft and having a lifting shoulder whereby the handle may be moved on said wheel shaft into position to bring said shoulder into engagement with the first-mentioned shaft to effect a lifting of the refrigerator unit or the handle may be moved into another position, with the shoulder retracted from the first-mentioned shaft for free pivotal movement of the handle, and means carried by the handle and acting on said wheel shaft for effecting a lateral shifting of the end of said handle from one position to the other.- said means comprising a shift lever movably mounted on said handle and having an enlarged aperture engaging said wheel shaft, the movement of said shift lever relative to said handle causing the handle to move from one position to the other on said wheel shaft.

9. In a refrigeratorV unit, the combination of a refrigerator with a jack carried by said refrigerator unit and having wheeled means carried by `the jack for supporting the refrigerator unit. said jack including a depending frame member carried by the refrigerator unit and having a transverse shaft, a wheel supporting link having one end mounted on said shaft and having its other end mounted on -a Wheel shaft, a wheel carried by said wheel shaft, and a handle pivotally mounted on said wheel shaft, said handle having an enlarged aperture surrounding said wheel shaft and having a lifting shoulder whereby the handle may be moved on said Wheel shaft into position to Ibring said shoulder into engagement with the first-mentioned shaft to eifect a lifting of the refrigerator unit or the handle may be moved into another position, with the shoulder retracted from the first-mentioned shaft for -free pivotal movement of the handle, and means carried by th? handle and actingon said wheel shaft for effecting a lateral shifting of the end of said handle from one position to the other, said means comprising a shift lever movably mounted on said handle and having an enlarged aperture engaging said wheel shaft, the movement of said shift lever relative to said handle causing the handle to move from one position to the other on said wheel shaft, and means carried by said handle for actuation of said shift lever.

10. In a refrigerator unit, the combination of a refrigerator with a jack carried by said refrig-` erator unit and having wheeled means carried by the jack for supporting the refrigerator unit, said jack including a depending frame member carried by the refrigerator unit and having a transverse shaft, a wheel supporting link having one end mounted on said shaft and having its other end mounted on a wheel shaft, a wheel carried by said wheel shaft, and a handle pivotally mounted on said wheel shaft, said handle having an enlarged aperture surrounding said wheel shaft and having a lifting shoulder whereby the handle may be moved on said wheel shaft into position to bring said shoulder into engagement with the first-mentioned shaft to effect a lifting of the refrigerator unit 0r the handle may be moved into another position with the shoulder retracted from the first-mentioned shaft for free pivotal movement of the handle, said enlarged aperture in said handle comprising a pair of partially circular recesses separated by a retaining hump, and said aperture being of sumcient width for the passage of the wheel shaft from one recess to the other.

l1. A jack construction for refrigerator car units comprising a wheel frame having a pair of depending flanges, a shaft carried by said wheel frame and pivotally supporting a pair :of metal links, each of said links having an ape'rture for supporting a wheel shaft at the other end of said links, a handle having a pair of legs, each of said legs being provided with an enlarged aperture surrounding said wheel shaft, said enlarged aperture having a pair of recesses formed in the upper side thereof and said handle legs having an extension provided with a recessed shoulder for engaging said first-mentioned shaft when the handle is in predetermined position, and a shift lever pivotally mounted on said handle and having an oblong aperture surrounding said wheel shaft, said oblong aperture being so arranged that pivotal movement of the shift lever causes the handle to move laterally from one recess to the other on said wheel shaft.

12. A jack construction for refrigerator car units, comprising a wheel frame having a pair of depending flanges, a shaft carried by said wheel frame and pivotally supporting a pair of metal links, each of said links having an aperture for supporting a wheel shaft at the other end of said links, a handle having a pair of legs, each of said legs being provided with an enlarged aperture surrounding said wheel shaft, said enlarged aperture having a pair of recesses formed in the upper side thereof, and said handle legs having an extension provided with a recessed shoulder for engaging said first-mentioned shaft when the handle is in predetermined position, and a shift lever 'pivotally mounted on said handle and having an oblong aperture surrounding said wheel shaft, said oblong aperture being so arranged that pivotal movement of the shift lever causes the handle to move laterally from one recess to the other on said wheel shaft, and latching means carried by said depending flanges for holding said wheel shaft in weight supporting position.

13. A jack construction for refrigerator car units, comprising a wheel frame having a pair of depending flanges. a shaft carried by said wheel frame and pivotally supporting a pair of metal links, each of said links having an aperture for supporting a Wheel shaft at the other end of said links. a handle having a pair of legs, nach of said legs being provided with an enlarged aperture surrounding said wheel shaft, said enlarged aperture having a pair of recesses formed n the upper side thereof, and said handle legs having an extension provided with a recessed shoulder for engaging said first-mentioned shaft when the handle is in predetermined position, and a shift lever pivotally mounted on said handle and having an oblong aperture surrounding said wheel shaft, said oblong aperture being so arranged that pivotal movement of the shift lever causes the handle to move laterally from one recess to the other on said wheel shaft, and latching means carried by said depending flanges for holding said wheel shaft in weight supporting position, said latching means being pivotally mounted on said depending anges, and resilient means for urging said latching means into latching position.

14. A `iack construction for refrigerator car units, comprising a wheel frame having a pair of depending flanges, a shaft carried by said wheel frame and pivotally supporting a pair of metal links, each of said links having an aperture for supporting a wheel shaft at the other end of said links, a handle having a pair of legs,

each of said legs being provided with an enlarged aperture surrounding said wheel shaft, said enlarged aperture having a pair of recesses formed in the upper side thereof, and said handle legs having an extension provided with a recessed shoulder for engaging said first-mentioned shaft when the handle is in predetermined position, and a shift lever pivotally mounted on said handle and having an oblong aperture surrounding said wheel shaft, said oblong aperture being so arranged that pivotal movement of the shift lever 'causes the handle to move laterally from one recess to the other on said wheel shaft, said handle comprising an elongated metal member provided with a pair of legs engaging said wheel shaft, and having a longitudinally extending shift lever rod carried by said handle and slidably mounted thereon for actuating said shift lever.

15. In a chassisfor a wheel supported member, the combination of a frame with a plurality of wheels at one end of said frame for supporting that end of the frame, a pair of guides carried by said frame and a wheel support slidably and rotatably mounted on said guides, xed supporting members carried by said frame at the end opposite to the first-mentioned wheels, a wheel carried by said latter wheel support and connected thereto through the intermediary of a jack, a handle connected to said jack and serving to actuate said jack to lift the frame from said fixed supports to be supported on said latter wheel, said handle also sewing as a controlling member for pulling, pushing or turning said latter wheel, said wheel support being mounted for free sliding movement on said guides when said frame is carried by said xed supporting members, and said wheel support having a predetermined vertical movement with respect to said guides, and stopmeans carried by said guides behind said wheel support at its foremost position whereby the wheel support engages said stop means and is secured against sliding movement when said wheel support is lifted by said jack into engagement with said guides in front ofA said stop means.

16. In a jack construction the combination of a frame member adapted to be supported by a wheel, said frame member having a link pivoted thereon and said link having at its opposite end a shaft carrying said wheel, with a handle member pivotally mounted on said latter shaft, said handle member having an elongated portion for luse in actuating said jack and having at its opposite end a rearwardly extending lifting shoulder, means carried by said frame member for engagement with said lifting shoulder when said handle is pivoted downwardly on said shaft to a predetermined point, said handle urging said shaft downwardly on said link to cause said wheel to lift said frame member.

17. In a jack construction the combination of a frame member adapted to be supported by a wheel, said frame member having a link pivoted thereon and said link having at its opposite end a shaft carrying said wheel. with a handle member pivotally mounted on said latter shaft. said handle member having an elongated portion for use in actuating said `iack and having at its opposite end a rearwardly extending lifting shoulder, means carried by said frame member for engagement with said lifting shoulder when said handle is pivoted downwardly on said shaft to a predetermined point, said handle urging said shaft downwardly on said link to cause said wheel to lift said frame member, and latching means carried by said frame member, said latching means having a shoulder for engaging said shaft when said wheel and link are moved downwardly into the position to support said frame member.

18. In a jack construction the combination of a frame member adapted to be supported by a. wheel, said frame member having a link pivoted thereon and said link having at its opposite end a shaft carrying said wheel, with a handle member pivotally mounted on said latter shaft, said handle member having an elongated portion for use in actuating said jack and having at its opposite end a rearwardly extending lifting shoulder, means carried by said frame member for engagement with said lifting shoulder when said handle is pivoted downwardly on said shaft to a predetermined point, said handle urging said shaft downwardly on said link to cause said wheel to lift said frame member, latching means carried by said frame member, said latching means having a shoulder for engaging said shaft when said wheel and link are moved downwardly into the position to support said frame member, and resilient means acting between said latch and frame member for urging said latch into the latching position.

19. In a jack construction the combination of a frame member adapted to be supported by a wheel, said frame member having a link pivoted thereon and said link having at its opposite end a shaft carrying said wheel, with a handle member pivotally mounted on -said latter shaft, said handle member having an elongated portion for use in ,actuating said jack and having at its opposite end arearwardly extending lifting shoulder, means carried by said frame member for engagement with said lifting shoulder when said handle is pivoted downwardly on said shaft to a predetermined point, said handle urging said shaft downwardly on said link to cause said wheel to lift said frame member, latching means carried by said frame member, said latching means having a shoulder for engaging said shaft when said wheel and link are moved downwardly into the position to support said frame member, and resilient means acting between said latch and frame member for urging said latch into the latching position, said latch having an extension for engagement with the foot of the operator and said latch moving in a downward direction to effect a release of the said shaft.

20. In a jack construction the combination of a frame member adapted to be supported by a Wheel, said frame member having a link pivoted thereon and said link having at its opposite end a shaft carrying said wheel, with a handle member pivotally mounted on said latter shaft, said handle member having an elongated portion for use in actuatirg said jack and having at its opposite end a rearwardly extending lifting shoulder, means carried by said frame member for engagement with said lifting shoulder when said handle is pivoted downwardly on said shaft to a predetermined point. said handle urging said shaft downwardly on said link to cause said wheel to lift said frame member, said handle having an elongated aperture engaging said shaft whereby the handle may be moved into one position with its lifting shoulder engaging said means on said frame member or another position where its lifting shoulder passes said latter means.

21. In a jack construction the combination of a frame member adapted wheel, said frame member having a link pivoted thereon and said link having at its opposite end a shaft carrying said wheel, with a handle member pivotally mounted on said latter shaft. said handle member having an elongated portion for use in actuating said jack and having at its opposite end a rearwardly extending lifting shoulder, means carried by said frame member for engagement with said lifting shoulder when said handle is pivoted downwardly on said shaft to a predetermined pint, said handle urging said shaft downwardly on said link to cause said wheel to lift said frame member, said handle having an elongated aperture engaging said shaft whereby the handle may be moved into one position with its lifting shoulder engaging said means on said frame member or another position where its lifting shoulder passes said latter means, and latching means carried by said handle for holding said handle in either o1 its said positions with respect to said shaft.

22. In a jack construction the combination of a frame member adapted to be supported by a wheel, said frame member having a link pivoted thereon and said link having at its opposite end a. shaft carrying said wheel, with a handle 'member pivotally mounted on said latter shaft,

said handle member having an elongated portion for use in actuating said jack and having at its opposite end a rearwardly extending lifting shoulder, means carried by said frame member for engagement with said lifting shoulder when said handle is pivoted downwardly on said shaft to a predetermined point, said handle urging said shaft downwardly on said link to cause said wheel to lift saidframe member, said handle having an elongated aperture engaging said shaft whereby the handle may be moved into one position with its lifting shoulder engaging said means on said frame member or another position where its lifting shoulder passes said latter means, and latching means carried by said handle for holding said handle in either of its said positions with respect to said shaft, said latching means comprising a member pivoted on said handle and having an elongated opening surrounding said shaft, said opening having walls defining two shaft-retaining positions.

23. In a jack construction the combination of a frame member adapted to be supported by a wheel, said frame member having a link'pivoted thereon and said link having at its opposite end a shaft carrying said wheel, with a handle member pivotally mounted on said latter shaft, said handle member having an elongated portion for use in actuating said jack and having at its opposite end a rearwardly extending lifting shoulder, means carried by said frame member for engagement with said lifting shoulder when said handle is pivoted downwardly on said shaft to a predetermined point, said handle urging said shaft downwardly on said link to cause said wheel to lift said frame member, said handle having an elongated aperture engaging said shaft whereby the handle may be moved into one position with its lifting shoulder engaging said means on said frame member or another position where its lifting shoulder passes said latter means, latching means carried by said handle for holding said handle in either of its said positions with respect to said shaft, said latching means comprising a member pivoted on said handle and having an elongated opening surrounding said shaft, said opening having walls deto be supported by alining two shaft-retaining positions, and a latchactuating handle pivotally connected to said latter member and slidably mounted on said handle.

24. In a movable vehicle, the combination of a chassis frame with a plurality of wheel brackets carried by said frame and located toward one end of the frame, wheels rotatably mounted on said brackets for movably supporting this end of the vehicle, a guide extending toward the other end of said vehicle and carried by the lower part of said chassis frame, a slider slidably mounted on said guide, a wheel bracket pivotally mounted on said slider for pivotal movement of the wheels to be carried thereby in steering the vehicle, a wheel carried by said latter bracket and connected thereto by means of a jack, iixed and stable supporting means carried by said other end of said chassis-frame so that this end of the frame may be supported on said fixed and stable supporting means or on said pivoted wheel, and a handle carried by said jack and adapted to be used for pulling the vehicle and steering it, and for actuating the jack to lift that end of the chassis frame from said ilxed supporting means and place its weight upon said pivoted wheel, said guides being of predetermined length with respect to the length of said handle, so that the jack may be slid backward on said guidesby means of said slider until the handle is disposed substantially beneath the chassis.

25. In a movable vehicle, the combination of a chassis frame with a plurality of wheel brackets carried by said frame and located toward one end of the frame, wheels rotatably mounted on said brackets for movably supporting this end of the vehicle, a guide extending toward the other end of said vehicle and carried by the lower part of said chassis frame, a slider slidably mounted on said guide, a wheel bracket pivotally mounted on said slider for pivotal movement of the wheels to be carried thereby in steering the vehicle, a wheel carried by said latter bracket and connected thereto by means of a jack, ilxed and stable supporting means carried by said other end of said chassis frame so that this end of the frame may be supported on said fixed and stable supporting means or on said pivoted wheel, and a handle carried by said jack and adapted to be used for pulling the vehicle and steering it, and for actuating the jack to lift that end of the chassis frame from said fixed supporting means and place its weight upon said pivoted wheel, said pivoted wheel being slidable under said guides to a position under said chassis, and said guides having a stop member located to engage said slider and prevent the sliding movement of the slider on said guides, when the slider is disposed beyond the stop member, and the pivoted wheel is supporting the weight of the vehicle.

26. In a movable vehicle, the combination of a er chassis frame with a plurality of wheel brackets carried by said frame and located toward one end of the frame, wheels rotatably mounted on said brackets for movably supporting this end of the vehicle, a guide extending toward the other end of said vehicle and carried by the lower part of said chassis frame, a slider slidably mounted on said guide, a wheel bracket pivotally mounted on said slider for pivotal movement Yof the wheels to be carried thereby in steering the vehicle, a wheel carried by said latter bracket and connected thereto by means of a jack, ilxed and stable supporting means carried by said other end of said chassis frame so that this end of the frame may be supported on said ilxed and stable supporting means or on said pivoted wheel, and a handle carried by said jack and adapted to be used for pulling the vehicle and steering it, and for actuating the jack t lift that end of the chassis frame from said xed supporting means and place its weight upon said pivoted wheel, said pivoted wheel being slidable under said guides to a position under said chassis. and said guides having a stop member located to engage said slider and prevent the sliding movement of the slider on said guides, when the slider is disposed beyond 'the stop member, and the pivoted wheel is supporting the weight of the vehicle, said slider having a predetermined lost motion in a vertical direction between its parts a 1d the parts of said guides, whereby the lower part of the slider hangs below said stop member when the weight of the vehicle is removed from said pivoted wheel, so that the slider clears and is adapted to pass the stop member to permit the jack and handle to be shoved under the vehicle.

2'7. In a portable refrigerator unit, the combination of a refrigerator provided with wheels for supporting one side of the'refrigerator and with legs for supporting the other side, with a jack unit slidably mounted on said refrigerator unit, said jack unit including a jack, wheels for supporting the jack, and a handle for actuating the jack, said refrigerator unit having guide means extending along its bottom for slidably supporting the jack, and stop means carried by said guide means' and adapted to engage a part of vsaid jack, whereby the jack is prevented from sliding when it is brought into lifting relation with said refrigerator unit, said jack having a lost motion slidable connection to said guide means for lost motion in a vertical direction,

and said stop means being located on the lower side of said guide means and being of predetermined vertical dimension with respect to said lost motion, to permit the jack parts below the guide means to slide under said stop means when the jack parts depend from the guide means without supporting weight,

CHARLES S. JOHNSTON.

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