US353257A - Willaed a - Google Patents

Description

(No Model.) l 2 Sheets-Sheet 1.

r J. A. DAVIS, Decd.

W. A. DAVIS, Executor. FEED MECHANISM FOR SEWING MACHINES.

N0. v353,257. Patented Nov. 23. 1886.

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(No Model.) 2 Sheets-Sheet 2.

J. A. DAVIS, Deod. W. A. DAVIS, Executor. FEED MECHANISM FOR SEWING MACHINES.

No. 353,257 Patented Nov. 23, 1886.

UNITED STATES PATENT OFFICE.

JOB A. DAVIS, OF BOSTON, MASSACHUSETTS; WILLARD A. DAVIS (EXEGUTOR OF SAID JOB A. DAVIS, DECEASED) AS SIGNOR OF ONE-HALF TO LEE E. MOORE, BOTH OF SAME PLACE.

FEED MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 353,257, dated November 23, 1886.

Application filed December 22, 1885. Serial No. 186,472. (No model.)

To aZZ whom it may concern.- forked at its upper end to receive theshaft 0, Be it known that I, JOB A. DAVIS, of Bosas shown in Fig. 3. The lower end of this ton, in the county of Suffolk and State of Maslink L is loosely connected, preferably by a 5 sachusetts, have invented a new and useful Imball-and socket joint, J, with an arm, K,

5 provement in Feed Mechanism for Sewing-Maprojecting from a rock-shaft, N, mounted in chines, of which the following, taken in consuitable bearings formed on the frame, as in nection with the accompanying drawings, is a Figs. 1 and 2. specification. At the front end of the shaft N an arm, R 60 The object of this invention is to provide a is erected, having its upper end vertically resimple feed mechanism of the class known as cessed to receive the edge of the swinging needle-feed apparatus, in which the goods plate X, Fig. 2, and provided with an ad are carried forward intermittently by a latjusting-screw, S bearing on such edge to'regeral movement of the needle. ulate the stroke of the arm R or rather the The general arrangement of the machine time in said stroke when it shall begin to I 5 shown in the drawings, aside from the feed move the plate X. This plate returns against mechanism, is similar to that set forth in my a stop, 0 under the action of a spring, K applications, Serial Nos. 186,467 and 186,470, secured to the frame by a screw Y It follows for patents on wax-thread sewing-machines, that if the screw S is retracted so as not to 70 filed simultaneously herewith, to which referquite touch the plate X when the arm It begins ence may be made, the same part in all cases to move, its movement will not carry the plate being designated by the same letter. X the full length of the stroke, and thus the My present invention consistsin the devices extent to which the work will be advanced by and combinations of devices set forth in the the sidewise movement of the needle while 75 appended claim. passed through it and through the work-plate In the drawings, Figure 1 is a side eleva- B is readily controlled.

tion, showing my present improvement ap- It will be clear without further explanation plied to a suitable frame. Fig. 2 is an end that when in the rotation of the pulley D the elevation of the same, and Fig. 3 an enlarged cam-grove G forces down the link L and arm 80 detail, the main shaft in transverse section on K, the rock-shaft N will be turned slightly linemw, Fig. 1. on its axis, and the upright arm R fixed The neeedle A has a vertical reciprocation thereon will be swung slightly to the left in imparted to it by the oscillation of an ob- Fig. 1, carrying with it the plate X, needleliquely-slotted plate, U, which engages a bar Z, andneedleAZwith thework being'oper- 85 stud, V, projecting from the side of the neeated upon.

dle'bar Z, as set forth in detail in my appli- What I claim is I cation No. 186,470, hereinbefore referred to. The combination, with the needle-bar Z The needle-bar Z is mounted in a recess in and mechanism for reciprocating the same a vertical plate, X, pivoted to the frame at vertically, of the swinging plate X, in which 90 Y, so that a slight swinging movement may said needle-bar works, the rock-shaft N, hav- 0 be given to it, as also explained in said case ing arms K. and R the latter provided with No. 186,470. I however effect this lateral the adjusting-screw S", the link L, and the movement on the pivot Y by my present inrotary pulley D, having the cam-groove G, vention in a somewhat simpler manner than substantially as set forth. 9 5 in such other case, as will be explained. In testimony whereof Ihave signed my name A is the frame of the machine, and O the to this specification, in the presence of two submain shaft rotating in bearings B. D is a scribing witnesses, 011 this 13th day of Novempulley fixed on said shaft, and revolving in her, A. D. 1885. i

the direction indicated by the arrows, Figs. 2 JOB A DAVIS.

and 3. In the side of the pulleyD is a cam-groove, Witnesses:

G, to receive a stud and friction-roller, H, MILAN F. STEVENS,

projecting from a depending rod or link, L, WILLARD A. DAVIS.

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