US2507814A - Hand sewing machine - Google Patents

Description

May 16, 1950 A. w. RANTANEN 2,507,314

HAND SEWING MACHINE Filed July 11,1947 4 Sheets-Sheet l I u ventor Alfonso W Ranranen y 1950 A. w. RANTANEN HAND SEWING MACHINE 4 Sheets-Sheet 2 Filed July 11, 1947 I I1 ventor Alfonso W Ranfanen B}! mg, a Attorneys May 16, 1950 A. w. RANTANEN HAND SEWING MACHINE 4 Sheets-Sheet 5 Filed July 11, 1947 m m m m u m b M m n m n a R 3 W N Q11 MHIY 0 AIY s W m I I A vm a w mm m QR 8 m I. WK 2. Q mm r 3 mm mm mm mm m mm nv kn mm 5 mm mm. k mm mm E 6 9w a kk \MvwVY Nv mm w om 3W kv R. R i mm QM v i m V mm w o m km Q Q X m 5 9 9 k May 16, 1950 A. w. RANTANEN HAND SEWING MACHINE 4 Sheets-Sheet 4 Filed July 11, 1947 IIIIII I11 renter Alfonso W. Ranfanen B) Z WWW Z98]:

Patented May 16, 1950 UNITED STATES PATENT OFFICE 3 Claims.

This invention relates to improvements in hand sewing machines.

An object of the invention is to provide an improved hand supported and operated sewing machine.

Another object of the invention is to provide an improved hand supported and operated sewing machine which will include a reciprocable needle and needle supporting bar and an interconnected reciprocable shuttle operable at right angles to said needle.

A further object of the invention is to provide an improved portable hand supported and operated sewing machine including a shuttle supporting base and a reciprocable needle and needle supporting bar mounted in a frame fixed to said base, and a cooperating spring tensioned needle bar engaging and operating lever pivotally supported on the end of said base remote from the needle bar.

A still further object of the invention is to provide an improved portable hand supported and operated sewing machine including a shuttle supporting base and a frame fixed thereto, together with a needle supporting bar and a needle reciprocably supported therein, with a needle bar and shuttle actuating lever pivotally supported upon said base, and resilient means for normally holding said needle bar and shuttle actuating lever in their raised or elevated position.

Another object of the invention is to provide an improved portable hand supported and operated sewing machine which will be adjustable to sew varying lengths of stitches, and which will have means for automatically feeding thread tothe needle of the machine while providing means for tensioning the thread disposed between the needle supporting bar of the sewing machine and its thread supply.

A still further object of the invention is to provide an improved portable hand supported and operated sewing machine which will be highly efficent in operation, and relatively inexpensive to manufacture and produce.

Other objects will appear as the description proceeds.

In the accompanying drawings which form a part of this application:

Figure 1 is a perspective view of the improved portable hand supported and operated sewing machine showing the same in the act of sewing a piece of material;

Figure 2 is a side elevation of the improved portable hand supported and operated sewing machine;

Figure 3 is a top plan view of the improved hand supported and operated sewing machine with interior portions thereof being shown in dotted lines;

Figure 4 is a side elevation of the improved portable hand supported and operated sewing machine shown from the opposite side from the showing in Figure 2;

Figure 5 is a sectional view taken on the line 55 of Figure 4; I

Figure 6 is a sectional view taken on the line 6-6 of Figure 4;

Figure 7 is a sectional view taken on the line '|'-l of Figure 4, and

Figure 8 is a perspective view of the reciprocable shuttle supporting and actuating guide rod.

Like characters of reference are used throughout the following specification and the accompanying drawings to designate corresponding parts.

In carrying out the invention, there is provided an improved portable hand supported and operated sewing machine including an elongated hollow base I of substantially square shape in cross section and open at one end.

A substantially U-shape frame 2 is secured intermediate the ends of the hollow base i to the upper surface thereof by means of the screw bolts 3, and supports the spaced vertically aligned bearing grommets 4 and 5, through which the needle bar 6 is reciprocably mounted, the same supporting the needle I in its lower end, and is normally held in its uppermost or raised position by means of the coil spring 8 disposed above its upper end between the upper bearing grommet 4 and the fixed washer 9 on said needle bar 6.

A spindle I 0 is supported on the upper end of the frame 2 for supporting a spool of thread i I, and an L-shape bracket I2 is mounted upon the frame 2 between the spindle l0 and the needle bar 6 for rotatably supporting the apertured thread tensioning disk l3 which is resiliently tensioned by means of the coil spring I4.

The thread I! extends from the spool to and through the apertures in the rotatable thread tensioning disk 53 and through a transverse opening #5 in the reduced upper end of the needle bar 6, and from thence downwardly through hereinafter described guide loops and apertures to be threaded through the eye H3 in the needle I.

A bracket I! is secured to the arcuate outer end of the frame 2 and is formed with a guide channel [8 in which the arm I9 is slidably mounted and upon the lower end of which the presser foot 26 is fixed. A laterally extending apertured ear 2| is formed on the arm I9 and slidably receives a pin 22 which is formed with an eye 23 and anchored to the bracket I1, and a coil spring 24 is disposed about the pin 22 and is variably tensioned by the nut 25 engaging the end of the spring to hold it under the desired tension. It will be seen that the presser foot 20 is resiliently urged to contact the upper surface of the hollow base i, which is formed with an aperture 26 through which the needle vertically reciprocates.

A pair of spaced apertured bearing ears 21 are formed on the upper surface of the U-shape frame 2 and pivotally support the bell crank lever 28 upon the bearing pin 29 supported by said ears 2?. A coil tensioning spring 36 is secured to the upper end of the bell crank lever 23 and has its opposite end attached to the apertured ear 3| fixed to the frame 2. A bent rod 32 is secured to the lower end of the bell crank lever 28, and is formed with an eye or loop 33 in its outer end through which the thread I I is passed.

A U-shape thread guide plate 34- is suitably attached in a vertical position between the side edges of the loop in the frame 2, preferably by welding, and thread guiding apertures 35 and 36 are provided in the outwardly extending side arms of said plate 34. A pair of vertically spaced thread guide loops 3! and 38 are secured to the plate 34 intermediate its ends for receiving and guiding the thread H, as clearly illustrated in Figures 4 and 7 of the drawings.

A supporting standard 39 is supported upon the rear upper surface of the hollow base I by means of the threaded bolts 40.

An operating lever 4| of inverted U-shape in cross section is pivotally supported upon the hearing pin 42 on the upper end of the standard 39,

and extends forwardly and upwardly at an angle to cooperate with the needle supporting bar 6. A U-shape leaf spring 43 is supported by the pivoted end of the operating lever II and is adapted to engage the upper surface of the base I for normally supporting the operating lever 4| in its raised or elevated position. The forward end of said operating lever 4| is apertured at 44 adjacent its outer end for the reception of the inner end of the needle bar 6, which is slidably disposed therethrough.

A pair of spaced forwardly extending arms 45 are secured to the undersurface of the outer end of the inverted U-shape operating lever 4| and are adapted to bear on and ride along the oppositely extending ends of the bearing pin 46 disposed transversely through the central portion of the needle bar 6 for forcing the same downwardly when said lever 4| is compressed and moved on its pivot 42 toward the hollow base I. An arm 88 is secured to the latter end of the lever 4| for engaging the lever 28 for operating the same to feed thread I I to the needle I.

A hollow cylindrical barrel 4'? open at its outer end is supported upon the upper surface of the operating lever 4| adjacent its outer end, and supports a rod 48 for reciprocable movement, the same being resiliently tensioned or projected by means of the coil spring 49 housed within the inner end of the barrel ll. The outer end of the rod 48 is adapted to be received in a socket 55 formed in the needle bar 6, being held therein by the resilient action of the coil spring 49 which projects the rod 48 forwardly. Thus, it will be seen that while the arms 45 engage the cross bear- 75 at Will.

ing pin 46 to lower the needle bar 6, the rod 48 whose outer end is received in the socket 5|] latches the lever 4| to the needle bar 6 so that as the needle bar is raised by the coil spring 8 disposed about the upper end of said needle bar 6 the lever will also be urged to a raised position.

A centrally disposed upstanding standard 53 is secured to the upper surface of the hollow base I by means of the screw bolts 54, and is transversely apertured adjacent its upper end to receive the pivot shaft 55 upon which lever 56 is fixed. The lever 56 is formed with a rearwardly extending portion 51 upon which the upstanding bearing finger 5B is rigidly mounted. A leaf spring 59 is secured to the end surface of the operating lever 4| and is adapted to resiliently seat upon the upper end of said finger 58, so that when the lever 4| is depressed, the leaf spring 59 is placed under considerable tension. An offset limiting rod 60 is secured at 6| to the lever 56 and is threaded on its upper end to extend through an aperture (not shown) in the operating lever 4|, and support the adjusting nuts 62 for adjusting the limit of the upward movement of said operating lever 4|.

A shuttle actuating lever 63 is fixed to the opposite end of the shaft 55 and is provided with a plurality of spaced openings 64 for selectively supporting the forwardly extending rod 65 whose forward end terminates in the loop 66 for supporting the thread I I. The lower end of the lever 63 is disposed through a longitudinal slot 61 in the upper surface of the hollow base I, and is connected by the crank 68 with the rear end of the shuttle supporting an operating guard rod 59. The rod 69 is formed with spring fingers I0 adapted to positively support a shuttle II for moving the same forwardly to pass through a loop formed by the needle I each time the operating lever 4! is moved towards the base I.

The bearing I2 is struck from the standard 53 and supports the crank I3 which extends downwardly as at I4 and inwardly as at 15 to pass through an opening IS in the standard 53 to project in front of the shuttle actuating lever 63 for holding the same fixed until the lever 4| is depressed almost to its lowest position, at which time the lever 4| will move downwardly on the release rod TI until it engages the nut 18 adjustably supported thereon, said rod I! being secured to the upper end of said crank I3. Continued downward movement of the operating lever 4| will trip the crank I3 to retract the lower end I5 which extends through the opening I6, thereby permitting the spring 59 to snap the shuttle actuating lever 63 forwardly to shoot the shuttle through the loop of thread (not shown), and said shuttle will again be retracted to its original position as the operating lever 4| is released and moves upwardly to its normal or inactive position. The leaf spring "A engages the end of the lower portion I5 of the crank I3 to normally and resiliently project the same into locking position in front of the shuttle actuating lever 63. A guard 58 is disposed over the front or open end of the base I to permit replacing of a bobbin (not shown) Within the shuttle II.

In operation, a piece of material is disposed beneath the presser foot 20 and the operating lever 4| is rapidly moved downwardly and upwardly, thereby causing the thread I I to be automatically fed to the needle 7, and by pulling outwardly upon the piece of material under the presser foot 28, the length of the stitches may be varied When the sewing has been completed 8 the loose ends of the thread are moved over the cutter blade 8| attached to the frame 2 by means of the screw bolt 82 to cut the same.

From the foregoing description, it will be apparent that there has been devised and provided a highly emcient form of improved hand sewing machine which will be relatively inexpensive to manufacture and produce.

While the preferred embodiment of the instant invention has been illustrated and described, it will be understood that it is not intended to limit the scope of the invention thereto, as many minor changes in detail of construction may be resorted to without departure from the spirit of the invention.

Having described the invention, what is claimed as new is:

1. A hand operated sewing machine comprising a base, a frame supported on said base, a needle bar carried by said frame for vertical, reciprocating movement, a needle carried by said needle bar, a thread supply, means for feeding thread to said needle, an operating lever pivoted at one end relative to said base for vertical swinging movement, said needle bar being moved downwardly during downward swinging movement of said operating lever, interconnecting means between said needle bar and said operating lever, and means normally urging said needle bar and said operating lever upwardly said interconnecting means including a spring urged plunger carried by said operating lever, said needle bar having a socket therein receiving said plunger.

2. The combination of claim 1 and bearing lugs projecting from diametrically opposite sides of said needle bar, and spaced arms carried by said operating lever receiving said needle bar and engaging said bearing lugs for downward movement of said needle bar during downward swinging movement of said operating lever.

3. A hand-operated sewing machine comprising a base, a frame supported on said base, a

needle bar carried by said frame for vertical, re" ciprocating movement, a needle carried by said needle bar, a thread supply, a, bell-crank lever having an upper portion pivoted to said frame for pendulus movement, a thread receiving element carried by the lower portion of said bellcrank lever, the upper portion of said bell-crank lever having a cam surface, an operating lever pivoted at its rear end to the base, the forward end of said lever being bifurcated and receiving the needle bar, the forward end of said lever extending forwardly past said needle bar, a bearing pin attached to the lever and extending forwardly of the needle bar, said bearing arm riding against said cam surface for imparting swinging movement to said bell-crank lever during movement of the lever relative to the base, a spring urged plunger carried by said lever, said needle bar having a recess therein receiving said plunger, a pair of diametrically opposed lugs projecting from said needle bar and engaging the forward bifurcated end of said lever, and spring means urging the needle bar and the lever away from the base.

ALFONSO W. RANTANEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 16,554 Pratt Feb; 3, 1857 136,057 Gullman Feb. 18, 1873 154,302 Van Alstine Aug. 18, 1874 216,942 Corey July 1, 1879 386,837 Litchfleld July 31, 1888 517,376 Brown Mar. 27, 1894 1,009,065 Hahn et a1 Nov. 21, 1911 1,243,921 Corrall Oct. 23, 1917 1,258,594 Miller Mar. 5, 1918 1,591,947 Laserson July 6, 1926 1,809,192 Cahill et al. June 9, 1931 1,883,746 HDoubler Oct. 18, 1932

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