US268804A - Thomas k - Google Patents

Description

(No-Model.)

T. K. KEITH 8E R. ARLETN.

EEED MEGHANISM EOE SEWING MACHINES.

No.268,804. Patente 'i I. H

E14/@'06 Mdm UNITED STATES vPATENT OFFICE.

.THOMAS K. KEITH AND ROSWELL UARLETON, F HAVIIRHILII,` MASS.

FEED MECHANISM FOR SEWING-MACHINES.

j SPECIFICATION forming part of vLetters ,Patent No. 268,804, dated December 12, 1882.

Application niednprnemsee. (Naumann.) l

To all whom it may concern Beit known that we, THOMAS K. KEITH and RoswELL CAELETON, both of Haverhill, in the improved feed mechanism for a sewing -machine, whereby any desired series of horizontal movements can be given to the work, so as to cause the stitch-forming mechanism to automatically arrange the stitches in any desired pattern-or design.

To these ends our invention consists in the employment of pattern-cams, rotated, step by step, by the power of the machine, and a work holding and feeding device capable ot' a horizontal movement in' any direction on the bed of the machine, and operated by said patterncams to give the work the ,desired series of movements.

The invention also consists in the provision of means for automatically raising the presserfoot while the work is being fed, and allowing it to hold the work when the stitches are being formed.

The invention also consists in certain details ot' construction, all of which we will now proceed to describeand claim.

Ot' the accompanying drawings, forming a part of this specitication,`Figure l represents aside elevation of a machine embodying our invention. Fig. 2 represents a top view of the same with a portion of the arm broken away. Fig. 3 represents an end view of the arm of the machine with the face-plate removed. Fig. 4 represents a section on line a: w, Fig. 1. Fig. 5 represents a design formed in stitches by the machine.

The same letters of reference indicate the same parts in al1 the gures.

In the drawings, A represents the bed of a sewing-machine. B represents the arm; G, the needle; D, the presserfoot,and E the shuttle, said parts operating inthe usual manner.

In the bed A are transverse dovetail grooves E E, extending from front to back, and in these grooves are fitted slides F F, which are adapted to reciprocate in said grooves. The slides F F are connected lat their ends by plates G G,

which are under the presser foot and needle,

so that the plates do not obstruct the operation Y Voi" the stitch-forming mechanism.

K represents a studjournaled in the rear portion of the arm of the machine, and provided. with aratchet, L, which is rotated, step by step, by apawl, M, operated by a rod, N, bell-crank lever O, and arm l?, and an eccentric, Q, on the driving-shaft R of the machine. On the stud K is placed a pair of pattern cams or plates, S T, whichare connected by a pin, U, with the ratchet L, so as to rotate therewith. The plate S has a camgroove, a, and the plate T a cam; groove, b.

c d represent levers pivoted to a stud, c, on the arm of the machine. The lever c is provided with a pin or roller, c', which enters the camgroove a', and the lever d is provided with a pin, d2, which enters the cam-groove b. The levers are thus caused to be oscillated by the rotary movements of the plates T S. The lower end of the lever c is connected with a bell crank lever, h, which is pivoted at t' to the bed of the machine, and is connected by a link, j, with one of the guides G. The lever dis connected by a rod, d', with the plate I.

It will be seen from the foregoing that the oscillations ot' the lever c will impart through thelever h and link j a reciprocating movement to the slides F F, guides G G, and plate I, carrying said parts toward and from the front of tliemachine. At the same time the oscillations of the lever d impart through the rod d a reciprocatin g movement to the plate I in a direction at right angles to the line of movement IOS . ings are adapted to move the work so as to form l needle-bar descends the pin p releases the lever he leaf-shaped design shown in Fig. 5; but it is obvious that a different design can be produced by differently shaped cams, so that by providing a number of pairs or sets of' cams, eachv differing from the others, a corresponding number of different designs may be produced.

The plates S T are adapted to be readily applied to and removed from the stud K. We prefer to secure the plates to the stud by means of a spring-hook,m, placed in a slot in the stud, and having a beveled outer end, which yields when the plates aremoved onto the stud, and springs out and prevents the withdrawal of the plates when they are in place.

The presser-bar D is provided with a pvoted lever, n, the lower end ot which bears on the lower end of the easing on the end of the arm B,and its other end projects upwardly toward the needle-bar C. The needle-bar has a pin, p, which, when said bar rises, strikes the lever ot and turnsit on its pivot so as to cause it to raise the presser-bar. The foot is thus raised slightly with the needle, so that it will not impede the movements-ot' the work. When the n and the presser-bar drops.

We claiml. In combination with the stitch -forming mechanism of a sewing-machine, a work-holding plate, means, substantially as described, whereby said plate is enabled to move horizontally in any direction on the bed of the machine, pattern-cams rotated by the power of the machine, and intermediate devices whereby said cams are caused to operate the work -holding plate, as set forth.

2. The combination of the bed having guidegrooves E, slides F, adapted to move in said grooves, and supporting-guides G, a work-holding plate, I, adapted to slide in the guides G, the pattern-cams01y b, and intermediate connecting devices, all arranged and operated as set forth. l

3. The combination ofthe arm B, the presser bar having the pivoted lever n, and the needlelVitnesses C. F. BROWN, A. L. WHITE.

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