US3406545A - Lock for locker doors and the like - Google Patents

Description

1968 B. SIEGAL ETAL 3,406,545

LOCK FOR LOCKER DOORS AND THE LIKE Filed Jan. 17, 1966 3 Sheets-Sheet 1 T 11v VENTORS A BWZOZZ Z. tjz'e gda z m 4 W ATTORNEYS 1968 B. L. SIEGAL ETAL 3,406,545

LOCK FOR LOCKER DOORS AND THE LIKE Filed Jan. 17, 1966 3 Sheets-Sheet 5 r 7 7 J2 @mmw IIIW HIIIIIH INVENTORS .Bzzrazz L. @zsga Z Jay 5. W'aacmzz M Z, ATTORNEYS Oct. 22, 1968 B. L. SIEGAL ETAL 3,

LOCK FOR LOCKER DOORS AND THE LIKE Filed Jan. 17, 1966 3 Sheets-Sheet 2 N Z? O 3 l 20 g- 44 64 Q 6F Z319 61 16 23 53 67 19 17 IN VENTORS fizzrazz if. LZ@ I Jay '5 Wm .22 m' Z ATTORNEYS 3,406,545 LOCK FOR LOCKER DOORS AND THE LIKE Burton L. Siegal and Jay S. Waxman, Skokie, Ill., assignors to Junkunc Bros. American Lock Company; Crete, 1H,, a corporation of Illinois a V. FiledJan. 17, 1966, Ser. Nil-1520,978-

8 Claims. (Cl. 70-456) ABSTRACT on THE DISCLOSURE.

Combined key operated and combination lock for locker doors in which thekey cylinder is separate from the center post for the tumblers and the center .post 'for the lock is pivoted to the lock casing and is driven from the key cylinder to effect release of the latch bolt. .The latch bolt is spring biased into "a latching position and isheld in this position by a latchdog held in a dogging position by a relatively weak spring. A release rocker is biased to release the latch dog by .a relatively .strong' spring and is held from release movement by the tumblers of the lock. As the slots in the tumbler are aligned, the

strong spring will overbiasthe weak spring and accommodate a tongue on the release member to move into the slots of the tumblers-and release'the latch dog toeffect openingof the door. A radial .ball driving connection is provided between the dial and dial knob. A detent index ing connection indexes the knob in the properrelation.

with respect to the dial and is held in engagement by a spring, and is releasedby the pressure on the dial againstthe spring. The radial balldriving connection is released upon turning of the key cylinder to accommodate a ball to move into engagement with a fiat spot on the key" cylinder and rotate the dial relative to the knob, to change the combination. v

Background of the invention In locks for lockers and particularly lockers for schools,

ble that the individual using. thelocker operate the lock to unlock the locker by dialing a combination, but that authorized persons be able to. unlock the locker by akey.

Insuch locks it is also desirable'to upset more than'one combination tumbler and,to move the knobland dial off. the last number of the combination when upsetting thetumblers as by opening the lock by dialing thecombina tion, and to enable the combination to readily bechanged where'the locker may be changed, and to provide a sate-J guard, against accidentallyturning the dial knob to turn the 'tumblers off the combination. The key operated mechanism for the lock should also be as pick proof as" possible. ,I

Objects of invention A principal'object of'the presentinvention is toip'roivide" a novel and improved lock particularly adapted forZIockQ ers, so arranged .as to upset more than one ,tumbl'er' and to movethe dial off the last number of .the combination.

turninga dial and knob in certain directions to certain numbers of the combination, in which a releasable drive connection is provided between the knob and dial to accommodate intentional release of the drive connection gymnasium locker rooms and industrial plants, it is desirato provide a new' Ue rd W6 Paten "and turning of the dial relative to the knob, to reset the combination. I

-A 'still further object of the invention is to improve upon the combination operated locks heretofore in use by providing a'rotatable dialplate separate from the combination knob with an indexing connection between the dialplate and knob to. prevent accidental turning of the dial plate with respect tov the knob, anda releasable driving connection corresponding to the indexing connection, releasable upon turning movement of the key plug relative topthe knob toaccommodate turning movement of the dial plate with respect to the knob, tech-angethe com-. bination. 1

t A further object of thelinvcntion is toprovide a pick-;

proof. key operated lockhaving a rotatable post turnable to effect release of the latch and a driving connection from thekey plug of the lock to the post, engageable upon turning of the key plug relative to the knoband effecting release of the latch-bolt by turning of the knob and key plug together.

.A still further object of the invention is to provide a simple and improved form of latch bolt arrangement in which the latch bolt is released by turning movement of a series of tumbler discs and is held in latched position by a pivoted latch dog and tongue engaging the periphcries of the tumbler discs, wherein a spring maintains the tongue in engagement with the peripheries of the tumbler discs, and moves thetongue into aligned slots in the discs.

upon turning of the discs through certain combinations, in which a second spring holds the latch dog into a doging position and is overridden by the first spring to effect release of the latch dog as the tongue comes into engagement with the aligned slots in the tumber discs.

These and other objects of the invention will appear.

from time to time as the following specification proceeds and with reference to the accompanying drawings wherein: v v

, FIGURE -1 is a front end view of a cabinet lock const'ructed in accordance with the principles of the present invention;

.. 1 ,FIGURE 2 is, a sectional view of the lock shown in FIGURE 1, taken substantialy along lines II-II of -FIG- URE 1; d r

' FIGURES is a plan view of the lock with the cover plate therefor removed, and with certain parts broken away and shown in section, and showing the latch bolt in its latched position; I --FIGURE 4. is a partial fragmentary sectional view taken substantiallyalong line IV-lV of FIGURE 3 with.

certain parts removed;

.FIGURE 5 is a transverse sectional view taken through the knob; I ,FIGURE 6 is a view taken substantially along lines VI VI of FIGURE} showing certain details of the res leasable drive connection between the knob and dial i; pla e;

, "FIGURE? isa transverse sectional view taken through the dial plate; and v t a f FIGURE 8 is a bottomplan view of the knob, showing the upsetting teeth on the knob for moving the dial plate off the last number of the combination as the lock is opened and showing the detent recesses in the knob, holding thegknob for accidentally coming off the, combination. i

I Referring now in particular to the drawings, we have. shown in FIGURES 1, 2 and 3 acabinet or locker lock 10 for mounting on the inside of the door panel 11 of a cabinet or locker and including a casing 12 abutting the inside of the door panelll and a cover plate 13 abutting the outside of the doorv panel and secured thereto as by machine screws 14 threaded in said cover plate,

to secure said cover plate to the door panel from the Patented Oct. 1968 inside of .the panel and also panel. The machine screws 14 may extend through the apertured portions of cars 15, extending laterally from opposite sides of the casing 12 and abutting the inside of the door panel, and through suitable apertured portions provided in the door panel into threaded engagement with the cover plate 13, for retaining the lock to the door panel.

The casing 12 has a bottom plate 16 having an upright tumbler post 17 pivotally mounted therein at the center of the casing, and retained to said bottom plate as by a snap washer 18. The tumbler post 17 forms a pivotal mounting for spaced tumblers 19, 20 and 21, spaced apart by washers 22 and biased upwardly along said tumbler post by a biasing spring 23, encircling said tumbler post and seated on the top surface of a cam 25 at its bottom and the undersurface of a washer 26, abutting the bottom tumbler 19. The cam 25 is adapted to release a latch dog 27 from dogging engagement with a latch bolt 29 by operation of a key plug 30 in a manner which will hereinafter more clearly appear as this specification proceeds.

The cover plate 13 forms a pivotal mounting for a knob 31, for operating the tumblers by turning the knob 31 and a dial plate 32 in the required directions to register certain numbers of the combination on the dial plate with an indicia mark 33 on the cover 13 to accommodate release of the latch dog 27 from the latch bolt 29 as the tumblers 21, 20 and 19 are turned to align radial slots 35 in each tumbler with each other in a conventional manner. The slot 35 in the top tumbler only is shown herein, it being understood that similar slots are provided in each tumbler.

The knob 31 has a sleeve portion 39 rotatably mounted in an aperture'd portion 40 of the cover 13 and extending through said apertured portion into the casing 12. The sleeve portion 39 has a downwardly opening drive slot 41 formed therein extending downwardly along an up- Wardly projecting drive pin 42 for the top tumbler 21, and turning said top tumbler to effect turning movement of the intermediate tumbler 20 through interengaging transfer pins 43 and 44 on the top and intermediate tumblers respectively. The intermediate or middle tumbler 20 in turn has a depending transfer pin 45 engageable with a transfer pin 46 extending upwardly of the bottom tumbler 19 for turning said bottom tumbler to move the slot 35 therein into position to be aligned with the slot 35 in the intermediate tumbler, and the slot 35 of the top tumbler, as the knob 31 is turned the required number of turns in the required directions to the numbers of the combination.

The latch bolt 29 includes a relatively flat arm 47 extending along the bottom 16 of the casing 12 and pivotally mounted in said casing on a vertical bolt pin 48, riveted or otherwise secured to the bottom 16 of said casing and extending upwardly to one side of the tumbler post 17 and tumblers 19, 20 and 21. The arm 47 extends from the bolt post 48 along the bottom of the-casing partiallyaround the tumblers 19, 20 and 21 and along a side wall 49 of the casing. A flange 50 is shown as extending upwardly from the arm 47 generally parallel to the side wall 49 when the latch bolt is in securing the casing 12 to the.

its latching position. The flange 50 has a bolt 51 of the.

latch bolt extending therefrom through an aperture 52 in the side wall 49.

' The flange 50 also has an integrally formed vertical flanged portion 53 extending upwardly of the bolt 51 in vertical alignment with the flange 50 toward the door panel 11. The flanged portion 53 has an upsetter pawl 55 riveted or otherwise secured to the inner face thereof. The upsetting pawl 55 is shown as being in the form of a leaf spring having a backwardly turned inwardly extending end portion 56 engageable with ratchet teeth 57 formed integrally with the sleeve portion 39 of the knob 31. The end portion 56 of the upsetter pawl engages andturns the knob 31 and dial plate 32 off the last number of the combination as the latch bolt is released, and also turns the slot 35 on the top tumbler 21 out of registered relation with respect to the slots 35, by the drive connection between the slot 41 in the knob 31 and the drive pin 42, projecting upwardly of the top tumbler 21. The arm 47 also has an angular flange 59 extending upwardly therefrom inwardly of the flange 50' and engageable with an upsetter pin 60 depending from the bottom tumbler 19 as the latch bolt 29 moves in a release direction, for upsetting the slot 35 in the bottom tumbler out of alignment with the slot 35 in the intermediate tumbler.

A torsion spring 61 encircles the latch bolt pin 48 and biases the latch bolt in a latching position. One arm of said spring engages the inside of a side wall 62 of the casing 12 while the opposite end arm of the spring 61 engages a flange 63 projecting upwardly of the arm 47 of the latch bolt.

The latch dog 27 holds or dogs the latch in its latching position .and is pivotally mounted adjacent the lower end of a post 64, disposed on the opposite side of the tumbler post 17 from the latch bolt 48, and riveted or otherwise secured to the bottom wall 16 of the casing 12. The latch dog 27 has a notch 65 formed on its outer end, engageable with an inturned end 66 of the flange 50, adjacent the lower end of said flange, to positively dog the latch bolt 29 in a latching position. A torsion spring 67 encircles the post 64 and biases the latch dog 65 into its locking position. 'As shown in FIGURE 3 one end of the torsion spring 67 abuts a side wall 68 of the casing 12, while the opposite end of said spring abuts a pin 69 extending upwardly of the latch dog, intermediate the ends of said latch dog, and biasing said latch dog in a counterclockwise direction to positively hold the latch bolt against clockwise release movement.

A release rocker 70 is pivotally mounted on the post 64 and has an arm 71 positioned along and inwardly of the pin 69, when the latch dog 27 is in its dogging position. A torsion spring 72 encircles the post 64 and biases the release rocker 70 to move against the spring 67- in a direction to release the latch dog 27 from the inturned end 66 of the flange 50 of the latch bolt 29, to accommodate opening of the door. The spring 72 is stronger than the spring 67 and overrides the spring 67 as a tongue 73 on the end of an upright flange 75 moves within the aligned slots 35 in the tumblers 19, 20 and 21. The flange 75 is formed integrally with the release rocker 70 and is abutted by one end portion of the torsion spring 72 and biased by said spring to engage the tongue 73 with the peripheries of the tumblers 19, 20 and 21 and to move said tongue into the slots 35, as said tumblers are moved to align said slots with each other by operation of the knob 31.

The flange 75 of the release rocker 70 has an arm 76 extending from the tongue 73 along the lower portion of the casing along and spaced from an upright flange 77 extending upwardly of the arm 47 of the latch bolt 29, on the opposite side of the latch bolt post 48 from the bolt .51. The flange 77 engages the arm 76 when the .tongue 73 is in the radial slots 35 and serves to move the tongue 73 out of said slots as the latch bolt is released. This will accommodate upsetting of the tumblers by the upsetters 56 and 59, extending from the latch bolt 29, and will position the tongue 73 to engage the peripheries of said tumblers and thereby accommodate the spring 67 to hold the latch dog in its dogging position and lock the latch bolt against release.

A driving connection is provided between the knob 31 and the dial 32, which is releasable to accommodate changing of the combination, as will now be described.

As shown in FIGURE 2, the knob 31 has a downwardly facing annular shoulder 79 disposed adjacent and facing the top surface of the cover plate 13, and engaging a plain annular surface 80 0f the dial 32. The dial 32 is shown as' being partially recessed-in an annular recess 81-, and as being biased into engagement with "a shoulder 79 by a wave spring 83, seated in the annul-arrecess 81 and en gaging the undersurface of the dial plate 32.

A ball 85 is provided to rotatably drive the dial plate 32 from the knob 31. As shown in FIGURES 2 and 6, the ball 85 is engageable with a radial slot 86 formed in the sleeve portion of the knob 31 beneath the shoulder 79. The ball is also cammed by the key plug 30 to engage a selected one of a plurality of semi-spherical recessed portions 87 formed in the inner wall of the dial plate 32. The key plug 30 has a flat 88 extending chordally thereof adjacent the lower end portion thereof, which when turned by turning movement of said key plug relative to the knob 31 by a key, accommodates the ball 85 to move out of a recess 87 inwardalo'ng the slot 86, and thereby accommodates turning movement of the dial 32 with respect to the knob 31, to reset the combination.

An indexing connection is provided between the dial plate 32 and the knob 31, to prevent the knob from being inadvertently turned with respect to the dial plate 32, to unintentionally bring the dial plate 32 off the combination. The indexing connection comprises a peaked detent 89 extending upwardly of the fiat annular surface 80 of the dial plate 32 and located at the zero number of the combination. The detent 89 is shown in FIGURE 6 as being at the zero number of the combination for registration with one of a number of corresponding recesses 90, formed in the shoulder 79 and opening toward the dial plate 32. An indexing recess is provided for each semi-spherical recess 87 formed in the knob 31, and serves to index the radial slot or passageway 86 with a semispherical recess 87 when resetting the combination and to hold the slot 86 from coming out of registry with an aligned semi-spherical recess 87 unless it is purposely desired to change the combination; Thus, when it is desired to change the combination, the key plug 30 must be turned to register theflat 88 with the passageway 86, to accommodate release of the driving connection between the knob 31 and the dial plate 32. The dial plate 32 must then be depressed against the wave spring 83 to release the detent 89 from a detent recess 90. The dial plate 32 may then be turned relative to the indicia mark 33.0n the cover 13 in a selective mannor, to reset the combination. v ..Referring now in particular to the releasable drive from the knob 31 to the tumbler post 17 and key release cam 25, the key plug 30 is shown in FIGURE 2 as having a downwardly opening drive socket 91 therein, slidably engaged by. -a rectangular tongue 92 projecting upwardly from a cam plug 93, rotatably mounted in the sleeve portion 40 of the knob 31. The cam plug 93 abuts a transverse wall 95-extending across the interior of the sleeve portion 39. A compression spring 96 seated on a shouldered undersurface of the key plug 30 at one end and on the camplug 93 at its opposite end biases'th cam plug into engagement with the wall 95.

The cam plugflihasa plunger99 depending therefrom and extending through ,anapertured portion of the wall 95 into engagement with a fiat drive key 100, slidably mounted in a slot 101 extending diametrically of the tumbler post 17. The key 100 has a depending tongue portion 102 extending within a socket 103 in the post 17 and leading downwardly from the bottom of the slot 101. A compression spring'105 isseated in the'bottom of the socket 103 and engages the bottom of the tongue 102 and biases the drive key into engagement with the plunger 99. The drive key 100 is retained to the tumbler post 17 as by a snap ring 106.

The cam plug 93 has a downwardly facing inclined cam surface 107 formed thereon and engageable with a cam 109 sloping upwardly of the top side of the wall 95 (FIGURE 5).

Upon turning of the key plug 30 by a key, relative to the knob 31, the downwardly facing cam face 107 will be 6 moved into engagement-with the upwardly "sloping cam face 109 to effect movement of the cam plug 93 toward the key plug 30 and to accommodate the drive key to move into engagementwith one of a plurality of diametrically aligned slots 111 formed'in the bottoni of the wall 95, and provide a driving connection between the knob 31 and the tumbler post 1 l Turning of the key plug to effect movement of the cam plug 93 toward the key plug to providev a driving connection between the knob 31 and the tumbler post17 through the pawl 100 will thus etfect turning movement of the release cam 25 against a torsion spring 112 into engagement with the latch dog 27, to move said latch dog and the notch 65 out of registry with the tongue 66, and thereby;{ accommodate release of the latch bolt by operation of a ey.

It may thus be seen that with the drive between the key plug and the tumbler post shown, there is no direct drive between the key plug and tumbler post, and the key plug must first be turned relative to the knob 31 to engage the drive and .then the key plug and knob mustbe turned together to release the latch dog 27 and accommodate retraction of the latch 29. This construction makes it ditficult to pick the lock and is a marked safeguard against unauthorized opening of the locker door.

It may also be seen that a new and improved combination and key operated lock has been provided of a simple and effective construction, in which both the dial plate and top and bottom tumblers are upset upon release of the latch and opening of the door, to provide an added safeguard against an unauthorized person solving the combination, and that changing of the combination may only be attained by purposeful relative movement between the knob and dial plate, by the depression of the dial plate to release the indexing connection and turning of the key plug to bring a flat 88 into registry with a passageway or slot 86, to disengage the drive connection between the knob and dial plate.

It may further be seen 'that the lock is of a compact form with the parts efficiently arranged to perform their functions and to provide the necessary safeguards against picking of the lock or solving the combination.

While we have herein shown and described one form in which our invention may be embodied, it may readily be understood that various variations and modifications in the invention may be attained without departing from the spirit and scope of the novel concepts thereof.

We claim as our invention: 1. In a combination operated lock, a lock casing, a post pivotally mounted in said casing, a latch bolt pivotally mounted in said casing on one side ofsaid post,

spring means biasing said latch bolt into a latching position,

a latch dog pivotallymounted in said casing and having dogging engagement with said latch bolt,

,spring means biasing said latch dog into a dogging position, 7 1

a release cam on said post engageable with said latch dog and moved upon turning movement of said post to release said latch dog,

aknob rotatably mounted in said casing coaxial with said post,

,a key plug'mounted in said knob for relative movement with respect thereto, for turning said knob upon the insertion of a key in said key plug and turning said key plug relatively to said knob into position to turn said knob with said key plug,

a drive connection from said knob to said post to pivot said release cam to release the latch comprising:

a drive key slidably mounted in said post and having an upper end portion adapted to have inter engagement with said knob to turn said drive 7; key and post upon turning movement of said knob, means biasing said drive key upwardly with respect to said post in position to interengage said knob, a cam mountedin said knob for relative turning and axial movement with respect thereto, means biasing said camto engage said drive key and hold said drive key out of interengagement with said knob, t and camming surfaces on said knob engageable with said cam and moving said cam against its bias upon relative movement between said key plug and knob to accommodate interengagement of said drive key with said knob, to effect turning of said post and release cam to release said latch dog by operation of said key plug. 2. The structure of claim 1,

wherein the drive key is rectangular and is suitably mounted in said post,

j wherein a spring biases said drive key outwardly with respect to said post,

' wherein the cam has a plunger depending therefrom engaging said drive key and has a drive member extending therefrom having slidable engagement with said key plug and rotated thereby,

wherein a spring seated on said key plug biases said cam into position to move said drive key out of engagement with said knob,

and wherein said knob has at least one camming surface thereon engageable with said cam and positively camming said cam toward said key plug upon relative movement between said key plug and knob, to release said drive key to have interengagement with said drive slot in said knob, and thereby effect release of the latch by a key.

3. The structure of claim 1,

wherein a plurality of tumblers are rotatably mounted on said post and include at least an upper tumbler and a lower tumbler and transfer pins for turning said tumblers, each tumbler having a generally radial slot therein, aligned by turning movement of said tumblers to the numbers of the combination, to effect release of the latch,

and wherein said latch bolt has vertically spaced upsetter pawls mounted thereon for upsetting both the lower and upper tumblers and moving said knob oif the last number of the combination upon release movement of said latch bolt.

4. In a combination operated lock,

a lock casing,

a tumbler post in said casing,

a knob coaxial with said tumbler post and mounted for rotatable movement,

a plurality of tumblers rotatably mounted on said tumbler post and including at least an upper tumbler and a lowertumbler,

each having a slot therein and having transfer pins engageable with each other for aligning said slots upon turning of the top tumbler into certain positions and in certain directions,

a drive connection from said knob to said top tumbler,

a latch bolt pivotally mounted in said casing to one side of said tumbler post,

spring means biasing said latch bolt into a latching position,

a latch dog holding said latch bolt in a latching position,

. a and releasing said latch bolt upon alignment of the slots in said tumblers,

a dial plate disposed coaXially of said knob, a key plug coaxial of said knob and turnable relative to said knob by a key, I a I p a releasable driving connection between said knob and dial plate, 1 releasable by turning of said key plug release said driving connection, an interengaging indexing connection between saiddial plate and said knob, a spring means biasing said interengaging idexing connection into interengagernenhand operable to disengage said interengaging connection upon depression of said dial plate against said spring, to accommodate resetting of the combination upon the release of said driving connection. 5. The structure of claim 4, wherein the releasable driving connection includes a slot in said knob, a plurality of recesses in said dial plate one of which is regist erable with said slot, a I ball in said radial slot and maintained in engagement with one of said recesses to elfect turning of the knob and dial plate by said key plug, said key plug being so formed as to cam said ball into a selected recess to effect a drive between said knob and dial plate and accommodate release of said ball from one of said recessesupon turning of said key plug by a key relative to said knob to reset the combination, upon the release of said indexing interengaging connection. 6. The structure of claim 5, wherein the key plug has a flattened portion and is turnable to register this flattened portion with said slot to accommodate the ball to move into engagement with said flattened portion and to release said ball from an associated recess. 7. The structure of claim 5, wherein the interengaging indexing connection comprises a detent and recess connection between said knob and said dial plate, and wherein the recesses in said indexing connection correspond in number to the recesses in said dial plate, to thereby assure the registry of said ball with one of said recesses in said dial plate, upon engagement of said detent with one of said detent recesses. 8. The structure of claim 4, wherein the tumbler post is pivotally mounted in said casing, and wherein a cam on said tumbler post is moved into engagement with said latch dog, to release said latch dog upon turning movement of said key plug in a release direction by a key.

into a position to References Cited UNITED STATES PATENTS 1,971,935 8/1934 Hope -314 2,083,358 6/1937 Bell 70-314 2,244,152 6/1941 Hamilton 70 314 X 3,273,363 9/1966 North 70 330 FOREIGN PATENTS 619,494 10/1935 Germany.

MARVIN A. CHAMPION, Primary Examiner.

E. I. MCCARTHY, Assistant Examiner.

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