US587908A - Necticut - Google Patents

Description

(11.?- 0 e W. M. AMMERMAN & 3.5.10813 SEWING MACHINE.

N0. 587,908. Patmed 311%., 10 1811;?

Hairs n STATES PATENT OFFICE;

WlLLlAlli M. AMMERMAN AND EDWIN J. TOOF, oF'NEw- HAVEN, eonnnc'rrcc'r, ASSIGNORS TO SAID 'roor.

vSEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 587,908, dated August 10,1897. I Application filed October 24, 1890. Serial No. 9,246. No model.)

Be it known that we, WILLIAM M. AMMER- MAN and EDWIN J. TOOF, citizens 'of the United States, and residents of New Haven, county of New Haven, and State of Connecticut, have invented new and usefullmprovemerits in Sewing-Machines, of which the following, taken in connection with the accompanying drawings, is a specification. a:

This invention relates particularly to the feeding mechanism of sewing-machines; and it consists in the construction and combination of parts for operating and regulating the movements of the feed device proper, as hereinafter set forth in detail, and pointed out in the claims.

Referring to the drawings, Figure 1 represents the bottom of the bed-plate of a sewingmachine provided with our improved feeding and i'eed-adjusting mechanism. Fig. 2 is an end View of the same through line a: at; Fig. 3, a top view of the feed-adj usting-lever-regulating device; and Fig. 4, a detail view of the feed-adjusting lever from the side opposite that shown in Fig. 1, showing its mode of Pi\'-,'

otal connection with its supporting-plate.

In the drawings, A represents the bed-plate of a sewing-machine; l3,the feed-bar,by which the serrated dog I, which projects above the by means or pins orprojections c, i'ocated'on' the latter, which project into horizontallyarranged siots b in thesaid feed-bar. Said disks are connected by a rod 0, pivotally and give the disks 0 0, connected thereto, a

rocking motion, which action causes the pins or projections c thereon to rise and fall, as

will be readily understood, and give the feedbar carried thereby its vertical or up-anddown movement.

The vibrating lever D is' centrally pivoted ment through the medium of a vibrating lever E, which is centrally slotted to slide and fulcrum on the saidstud'Aand atone end connects or engages with said feed-bar to operate the latter and at its opposite end is provided with a pin or projection thereon which extends and operates within a groove or guide-- way It, located in one end of a feed-adjusting lever II, in a manner and for the pu'ipose as will hereinafter be described. v

l represents a connecting-rod pivotal] y attached at one end to the said lever l and at its'opposite end embraces a cam or eccentric also located on the said vertically-operating shaft E, by which .it is operated to reciprocat-e saidlever F and cause it to vibrate (and thereby the feed-bar) by reason of the pin or projectionat one end thereof operating in the said guidcway h, which is adapted to be adjusted to a greater or less angle in its rela-. tion to the length of the lever F, according to thelength of the throw of the feed desired, as it will be readily understood that the degree at which the angle of said guideway is set, whether greater or less,will regulate the length of, vibrations at said lever aceordingiy. T he fled-adjusting lever ll, which is adapted to be adjusted from the upper silt;

face of the cloth-plate by a connecting setserew h, is provided with two pivot-pins h? h, arranged thereon in a line parallel with the pivot-pins b have their hearing, are arof the lever F, or when the end of the lever l is immediately over one of said pivotal centers of the lever 11, the feed-bar engaged by the opposite end of the lever F is in its normal starting position at the front of its r'o raceway in the cloth-plate of the machine.

By moving or adjusting said lever II from one to the other of its pivotal centers reverses the angle of the guideway 7i therein and changes or reverses the throw or feed of t5 the feeding device accordingly, as will be ,readily understood.

The object of the lever 11 operating on two ;pivotal centers, as described, is to throw the whole length of the guideway It to one or the same side of the line of its pivotal centers whenadj usted on eithcr of the same, in order that the lever F, engaged and guided thereby, may ca use the feed-dog to start when feeding forward and end when feeding backward at a normal'position at the front end of its raceway.

The feed-adjusting lever II is provided with a pin or projection 71 thereon, which projects and operates in a groove h located in the plate It and formed in the arc of the "circle of each pivot-point of said leven-the object of said groove, as described, being to prevent an undue vertical movement of the pivot-pins 7t h and insure their proper operation.

,In order to regulate the adjustment of said lever 11 when moved to change the direction of the feed in such manner that the length of throw of the feed may be the same when 40 adjusted to feed in opposite directions alt-erin unison to change the length of the slot a,

which terms the path in which the adjustingscrew it is adapted to be moved. Said regulating arms or levers are secnredor held.

stationary when adjusted to the "desired position by means of a clamping-plate 1', secured above. the pivoted end of said lever, and by a set-screw i, which latter is adapted to clamp said plate. One of said arms I I is provided with a slotj' for the passage of the set-screw i and allow said arm or, lever to be moved oradjusted.

lVe claim- 1. Ina sewing-machine, the combination with the feeding device and its operating-lever, of astitehregulating mechanism, comprising an adjusting-lever having a groove therein to receive and guide a-pin located 011' said feed-operating lever, and provided with two pins or projections arranged in a line parallel with the said groove therein, a stationary plate having two guidewa-ys in which the pins on said lcverextend to pivotally support the latter, means for holding said lever with the groove therein in a stationary adjusted position, and means for giving vertical movement to the feed, substantially as described and for the purpose set forth.

2. In a sewing-machine, the combination with the feeding device and its operating-lever, of a stitch-controlling lever having a guideway therein to receive a pin or projection on said operating-lever, and a pair of pivoted disk-levers operatively connectedwhereby the arm with which each is proided may be moved simultaneously to and from a giveirpoint, whereby the throw of the stitch-controlling lever is restricted at the will of the operator, and means forgivingvertical movement to the feed device, substantially as set forth.

3,111 a sewing-machine, the combination with the feed-bar, and means for giving the same its vertical movement, of a cent-rally pivoted vibrating lever engaging at one end with said feed-bar, a pivoted ad justing-lever provided with a groove therein to receive and I guide a pin or projection on said vibrating lever, means for holding said grooved adj usting-lever in a stationary adjusted position, and a pair of pivoted adjustable stops arrangedto move simultaneously for regulating the} movement of said adjusting-lever, substantially as set forth.

4:. The combinatign in asewing-machine, with the'driving-shaft, feed-bar, two crankdisks supporting said bar and united by a connecting-rod, and means operating said crank-disks to give a vertical movement to the connected teed-bar, of a centrally-pivoted vibratinglever connecting at one end with said feed-bar, and at or near its opposite end provided with a pin or projection thereon, a pivoted lever provided with a groove arranged to receive. said pin or projection, means for holding said grooved lever in a stationary adjusted position, and a driving-rod connecting wit-h said vibrating lever and operated by a cam-or eccentric located on the driving-shaft,

substantially as and'for the purpose set forth.

5. In a sewing-machine,'the combination with the driving-shaft, and feed-bar,-of two crank-disks supporting said feed-bar and from the'driving-shaft, substantially as described and for the purpose set forth.

6. In a sewing-machine, the combination tends and operates Within agi'oove in thefbeiiwith the feed-bar, means for giving'rise and plate, and means for adjustingv said feed-adfail to the same, and. a. vibrating lever conjusting lever, substantially as and for the meeting at one end with said feed-bar, of a purpose set forth.

5 feed-adjustiiw lever having nwo pins or pro- 7 I l J; 1 T jeotions exteiiding within gnideways in the r g' gg bed-plate to move and pivot therein, and pro vided with a transverse groove or guideway \Vitnesses: to receive a pin or projection on said vibrat- ANNIE L. HAYES, 1o ing lever, and with a guiding-pin which ex- JOSEPH M. CRANE.

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