US42770A - Improvement in sewing-machines - Google Patents

Description

W. M. HORNE.

Sewing Machine.

No. 42,776. Patented May 17, 1864.

UNITED STATES PATENT OFFICE.

\VM. M. HORNE, OF BOSTONZ, MASSACHUSETTS.

IMPROVEM ENT IN SEWING- MACHINES.

Specification forming part of Letters Patent- No. 12,770, dated May 17,

To all 'whom it may concern Be itknown that I, WILLIAM M. HORNE, of Boston, in the county of Suffolk and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Sewing- Machines; and I do hereby declare that the following, taken in connection with the drawings which accompany and form part of this specification, is a description of my invention sufiicient to enable those skilled in the art to practice it.

This invention relates to that class of sewing-machines in which, besides the thread or threads used to produce the stitches, there are employed other threads, generally in fancy colors, for the purpose of effecting various ornamental results.

My machine is an improvementon the mechanism seen in Patent No. 31,864; and theimprovement consists primarily in the employment of one or more loop-holders or fingers, in

combination with eye-pointed thread-crossing arms; also, in the mechanism for operating such loop-holders, and in the method of operating the thread-crossers.

A machine embodying my invention is represented in side elevation in Figure 1 and in front elevation in Fig. 2, so much of the ordinary sewing mechanism being shown as will enable my invention to be clearly understood. Fig. 3 is a top view of the loop-holders or fingers, showing their position when holding the threads in respect to the thread-crossers and the needle. Fig. 4 shows the arrangement of the ornamental threads produced by the action of the loop-holders. Fig. 5 represents a modification of the invention where only one loopholder is employed, the result being to produce an arrangementof the ornamental threads as shown in Fig. 6.

a denotes the bed-plate of the sewing-machine, upon which is arranged in any of the well-known methods a sewing-machine mechanism employing to produce the stitches either one thread, as in whatareknown as the chainstitch machines, or two threads, as in the loop-stitch or the shuttle-stitch machines.

11 is the vertical needle; c,theneedle-thread; d, the presser and feed foot; ef, the eye-pointed thread-crossin g arms; g IL, the crossing threads; 'ik, the loop-holders or fingers. Each loop-holder consists of a long arm or finger fastened at its rear end to a lever, 1, arranged as seen inthe drawings,b v an adjusting-screw, m, which screw admits of the adjustment of the finger to make theloop of thread longer or shorter, as circumstances may require. These loopholders or fingers have an up-and-down and forward-and-back movement, as follows: They first move forward toward the needle over the work and over the cross-threads g h, the two finger-points being on opposite sides of the needle and between the needle and the threadcrossers. Next the points of the holders have a downward movement upon the work and upon the threads. There they hold the threads while the arms ef cross, carrying the threads just in rear of the ueedle,which has previously descended into and is now in the cloth. As the needle ascends, and while the loop-fingers rest upon the work, the feed-foot moves back over and down upon the cloth, preparatory to feeding it, and its descent brings it upon the loops during the latter part of the ascent of the needle. After the feed-foot has come down upon the cloth the loop-fingers t k retreat. As or before the cloth is fed the fingers z it rise, preparatory to their next forward movement over and down upon the cross-threads, to anticipate the next cross-movement ot' the arms cfand their threads g it. Before the next descent of the loop-fingers and subsequent crossing of the threads the needle descends or partially descends, so that its thread 0 shall bind the last loops in position on each side of the seam made by the thread 0. These movements of the loop-fingers are produced as follows: The rear end of the lever I has a stud or projection, a, which passes through the table and is operated upon by a cam, 0, on a cam-shaft, p. This cam has two operative camsurfaces, one on its inner face and another-on its periphery, the lower end of the stud being operated upon by the periphery-cam, which is so made as to impart at proper times, in connection with a spring, q, the desired extent of upward and downward movement to the loopfingers, while a lip, r, from the stud n is operated by the face-cam, or so as, in connection with a spring suitably arranged, to effect the lateral movement of the fingers.

In the modification of my invention shown in Fig. 5 there is but one-loopfinger, and this opposite directions, as seen in Fig. 1. When has a movement which elongates the loop, as

will be understood from the drawings. The cam to operate the lever s, to which this finger is applied, may be so made that the finger shall take the thread from each crossing arm cf, or from only one of them; and when desirable only one crossing thread maybe used. The back movement of the finger brings it in rear of the loop-thread, between the eye of the vthread-crosser and the needle, and so that in its forward movement it shall catch into the thread and bring it into the position shown in Fig. 5, and so as to lay the threads in long and successive loops, as seen in Figs. 5 and 6. An adjusting-screw, 2, permits the loop-finger to be drawn in or out from the lever s in order to regulate the length of loop. In the employment of either of the devices shown in Figs. 3 and 5 it will be observed that there is substantially the same operation performed-namely, the detaining of the thread drawn out by the thread-crosser, so that the succeeding movement of the thread-crosser,in conjunction with the other parts of the mechanism, shall cause the thread or threads to be laid in the form of loose loops upon the surface of the work, and either on one or both sides of the seam prod need by the binding-thread, the modification shown not only detaining the thread so as to form the loop, but elongating the loop, as shown. The arrangement of threads shown in Fig.4 is whatis known as gimp trimming, while that shown in Fig. 6 is a fringe trimming.

Other modifications may be made without departing from the spirit of this inventionas, forinstance,the loops upon one side of the needle may be all formed from one spool and those on the other side from the otherspool, instead of interminglingthem or taking them from both spools alternately, as seen in Fig. at.

The movement of the thread-crossers is effected as follows: The arms cj'are hung at top upon a pin, 1., which passes through them into the goose-neck, and so as to allow them to swing freely. Each arm is provided with adiagonal 'slot-, a, and through the two slots a pin, a, projecting from the upper arm, 10, of a bent lever, 00, extends. The two slots have inclinationsin the pin is at the bottom ot'the slots the threaded ends of the crossers lie on one side of the needle, While by movement of the pin to the upper ends of the slots the arms are crossed and the position of the threaded ends and the threads reversed. The lower arm, 3 ot' the lever :20 is operated upon to raise and lower thepin e by acam, 2, on the cam-shaft 1); or any other suitable means may be employed for producing the vertical movements of the pin 1) to operate the slotted arms 0 By this arrangement of the mechanism to operate the arms g h the movement of the thread-crossers is made definite and positive, and noirregularity can take place in the length of the loops, at whatever speed the machine may be run.

To use the modification of my invention shown in Fig. 5 it is not requisite to have the loop-fingers lie upon the loop,as shown in Fig. 3, as the loop-finger holds the loop outside of or beyond the thread-crosser, instead of between the crossers and the needle. It is only therefore necessary to impart a reciprocating horizontal movement to the lever 5', instead of the up-and-down and l'orward-and-back movement given to the lever land fingersi it, this reci n'ocating movement being imparted by a face-cam on the shaft 1). This will be understood from Fig. 7.

I claim- 1. Combining with the thread-erossers g 71. and the stitch-forming mechanism a device or devices for holding the ornamental thread or threads, so as to form the same into a series of loose loops on one or both sides of the bindingthread, substantially as set forth.

2. The mechanism for producing the movements of the loop-fingers, substantially as described.

Operating the thread-carriers by means of the diagonal slots at and pin 0:, in the manner specified.

Executed this 26th day of March, A. D. 1864.

\VILLIAM M. HORNE.

In presence of- J. B. CROSBY, FRANCIS GOULD.

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