US432956A

US432956A - Island

Info

Publication number: US432956A
Authority: US
Publication date: 1890-07-22
Anticipated expiration: 1907-07-22

Description

(No Model.) 2 Sheets-Sheet 1.

, O. R. SQUIRE. FEEDING MECHANISM FOR SEWING MACHINES.

No. 432,956.- Patented July 22, 1890.

INVEN FDR 7/?1/14.

WITN S55E51- (No Model.) 2 Sheets-Sheet 2.

0. R. SQUIRE. FEEDING MEGHANISM FOR SEWING MACHINES. I No. 432,956. Patented July 22, 1890.

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NITED STATES PATENT OFFICE.

CHARLES R. SQUIRE, OF BROOKLYN, NEIV YORK, ASSIGNOR TO FREDERIC CONDIT, OF PROVIDENCE, RIIODE ISLAND.

FEEDING MECHANISM FORSEWlNG-MACHINES.

SPECIFICATION forming part Of Letters Patent NO. 432,956, dated July 22, 1890.

Application filed March 15, 1889. Serial No- 303,4=43. (No model.)

To all whom it may concern:

Be it known that I, CHARLES R. SQUIRE, of the city of Brooklyn, in the county of Kings, in the State of New York, have invented a certain new and useful Improvement in Sewing-Machines; and I declare the following to be a specification thereof, reference being had to the accompanying drawings.

Like letters indicate like parts.

Figurel is a front elevation, partly in vertical section, of such parts of a sewingmachine embody my invention. Fig. 2 is a transverse vertical section on the line at of Fig. 1. Figs. and 4 show in front elevation the feed and shuttle carriers at the end of their forward and backward movements, respectively, and the link operating the same with a differential motion. Fig. 5 is an end elevation, with the bed-plate in vertical section on line 3/ y of Fig. 1. Fig. 6 shows a modified form of the feed-carrier and shuttle-carrier and their intermediate connection. Fig. 7 is a side elevation of the feed-carrier. Fig. 8 is a cross-section on line of Fig. 7.

My invention is an improvement upon the device shown in my pending application for Letters Patent, Serial No. 248,383.

It relates to the feeding mechanism of sewing-machines, and consists in providing the feed-carrier with a cam on its periphery adapted to lift the feed-bar, and with a cam on the inner face of the carrier, at its rear end, adapted to advance the feed-bar at the same time that it is lifted as aforesaid.

The several parts of my improved sewingmachine are fully specified in my said pending application, and therefore need only to be described here in a brief manner.

A represents the table, and B the legs, of the sewing-machine.

O is the bed-plate, cut away at C to allow the lower end of the needle-arm to extend through it. It is fastened to the table A by bolts F. The pitman M of a treadle revolves the wheel M in the well-known manner. The wheel M is rigidly fastened upon the main shaft M, which is mounted upon the legs 13 of the machine. A worm'wheel L is secured upon the main shaft M and turns with it.

The bed-plate G has hangers 0 C projecting downwardly. A shaft I is mounted within a bearing 0 formed in the hanger O and at its rearend has a central conical recess 2, into which enters a screw-bolt C, which passes through the hanger C and engages with said recess 2' to furnish a bearing for the shaft I at that end and to take up the lost motion of said shaft longitudinally. The shaft I has a crank and pin I and a worm K- formed on it. A needle-arm G is pivotally mounted at G on the fixed arm D, and has its lower extremity slotted longitudinally, as shown at g. The crank-pin I enters and engages with said slotg. At its opposite end the needle-arm G carries the vertiCally-reciprocating needlebar II in the usual manner, said bar H being supported within guides of the standard E. A bracket 0 extends downwardly from the bed-plate O. A feed-carrier N is pivoted thereto at n, and a shuttle-carrier O is pivoted to said bracket 0 at 0'. The feed-carrier N has a slot 0 and the shuttle-carrier O has a pin a, which enters and engages with said slot 0 A link-bar P, pivoted to the end of the needle-arm at p, is also pivoted to the feed-carrier at p. As explained in the specification of my said pending application, the operation of said parts of my machine is as follows: The revolution of the wheel M by the bitman M of the treadle in the usual manner turns the main shaft M and the worm-wheel L, which is fastened on said main shaft. The wormwheel L engages with and turns the worm K of the shaft I, and the crank-pin I, engaging with the slot 1 of the needle-arm G, causes said needle-arm to vibrate, which vibratory motion gives a reciprocating motion to the link-bar P and at the same time gives a vertical reciprocating motion to the needle-bar II and causes the needle inserted therein to pass into and out of the cloth. The link-bar in turn oscillates the feed-carrier N, which oscillation is communicated to the shuttlecarrier 0 by means of said pin-and-slot connection a 0 The carriers N 0 have a differential movement,because the distance from the pivot 'n of the carrierN to the pivot 19, by

which the link P is connected with saidfeedcarrier, is greater than the distance from the pivot of the shuttle-carrier O and the pin n of said carrier, which enters the slot 0 of the feed-carrier N. The consequence is that the shuttle-carrier O has a quicker travel and describes a greater are than the feedcar rier N.

Havingthus described the mechanism which is the subject of the specification of my pending application,I will now proceed to the description of those parts which constitute the subject of my present application. The feedcarrier N has two cams, one a side cam n projectinglaterally from the rear face of said carrier, and the other a segmental cam n formed eccentrically upon the periphery of As the carrier N moves forward,the feedbar S is lifted by the segmental cam 02 and is also advanced by the lateral pressure of the side cam n of said carrier. As the carrier N moves backward, the cam 02 causes the feedbar which rides upon it to descend, and the passage of the cam n allows said feed-bar to return to its former position by the action of the spring t. These movements of the feedbar, in connection with the presser-foot, feed the cloth from stitch to stitch. The shuttlecarrier 0 has a rest 0 in which the shuttle R is supported and carried.

The operation of my improved devices is as follows: \Vhen the feed and shuttle carriers are thrown backin the position shown in Fig. 4, the needle is down to its full extent, and will rise a short distance to loop the thread before the shuttle reaches the loop in its forward movement. The shuttle carrier advances more rapidly than the feed-carrier and passes the shuttle through the loop and moves rapidly forward out of the Way, while the feedcarrier follows with a slower movement to raise and push forward the feed-bar after the needle has been withdrawn from the fabric. In

Fig. 3 the carriers are shown in position at the end of their forward throw and the needle is then up to its full extent. As the needle descends the carriers rock back, the feed-bar is lowered and pulled back by the spring to normal position, as shown in Fig. 5, and the shuttle is carried back by its carrier to the full extent of its backward throw, so as to give ample-space and time for the needle to descend and make the next/loop.

Instead of connecting the carriers by a pin upon one passing through a slot in the other, as hereinbefore described, they may be c011- nected bya link V and mounted as shown in Fig. 6, and produce the same movements. In Fig. 6, however, the bracket is shown as being solid and having a slot through which the pin 02 extends. In such a construction of the parts the carriers are mounted on opposite sides of the bracket.

I claim as a novel and useful invention and desire to secure by Letters Patent- 1. In a sewing-machine, the combination of the bed-plate, the standard, the presser-foot, the feed-bar, the pivoted fced-carrier having the cams n a the link pivoted to the feedcarrier, the vibrating needle-arm pivoted to said link and havinga slotted end, the wormshaft having a crank in engagement with said slot of the needle-arm and rotatable by its engagement with the worm-Wheel of the driving-shaft, substantially as specified.

2. In a sewing-machine, the combination, with the needle-arm, the needle-bar, the needle, the standard, and the presser-foot, of the feed-carrier pivoted on a bracket and having the cams n 75, the shuttle, the shuttle-carrier pivoted upon said bracket eccentrically to the center of oscillation of said feed-carrier, said carriers being connected at points unequally distant from their pivotal centers to secure their differential movement, and the movable feed-bar resting near its free end on the periphery of said feed-carrier and suitably supported at its opposite end, and the spring adapted automatically to return said feed-bar to its normal positiomwhen relieved from the pressure of said cam at, substantially as specified.

CHARLES R. SQUIRE. [n s.]

lVitnesses:

GEORGE E. RIGHTER, HENRY CLAY \VOOD.