US580849A

US580849A - Sewing-machine

Info

Publication number: US580849A
Authority: US
Publication date: 1897-04-20
Anticipated expiration: 1914-04-20

Description

(N0 Model.) 2 Sheets-Sheet 1.

W. H. CURRIBR. SEWING MAGHINE.

No. 580,849. Y Patented Apr. 20, 1897.

mmh

WITNEEEEE FNVENTUR d W. H. CURRIER.`

No Model.) 2 Sheets-Sheet 2.

. SEWING MACHINE.

Patented Apr. 20, 1897.

WITNEZ-:EEE

of. C?

Nirnen STATES Q 'PATENT OFFICE.

VILLIAM II. CURRIER, OF BRAINTREE, MASSACHUSETTS.

lSEWING-MAGHINE.

SPECIFICATION forming part of Letters Patent No. 580,849, dated April 20, 1897.

Application led November 6, 1896. Serial No. 611,194. (No model.) i

To @ZZ whom it may concern.-

Beit known that I, WILLIAM Il. CURRIER, a citizen of the United States, residing at South Braintree, in the county of Norfolk and State of Massachusetts,have invented certain new and useful Improvements in Sewing- Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to lock-stitch sewing-machines, and more particularly to that class of lock-stitch machines embodying a circular needle and reciprocating shuttle.

The object of the present invention is to provide a simple and eective means for holding the shuttle thread Within the path of movement of the needle, When the shuttle is in its retracted position, to prevent a twist or knot in the lock as the stitch is formed; and to this end the present invention consists of the devices and combination of devices hereinafter set forth and claimed.

The present invention is shown in the accompan ying drawings, in which- Figure l shows a portion of the head of a lock-stitch welt-machine embodying the invention. Fig. 2 shows an enlarged detail view of the shuttle box or race and portions of the mechanism for actuating the shuttle. Fig. 3 is a similar View showing a modified 4form of the present invention.

Similar letters of reference refer to similar parts throughout the several views. Referring to the drawings, A represents the back-rest; B, the looper; C, the needle; c, the needle-segment; D, the take-up; d, the take-up lever; E, the thread finger or measurer; F, the thread-retainer, which retains the loop of needle-thread while-the shuttle is passing through the same, and G the loopspreader, which spreads the loop while held by the retainer for the passage of the shuttle, all of which parts, except as hereinafter noted, together with their actuating mechanism, may be of any usual or convenient construction and form no part of the present invention.

As shown in the drawings, the parts above referred to are substantially similar in form and arrangement to corresponding parts of the machine now known in the trade as the Goodyear lock-stitch welt-machine and embodying the invention of Christian Danccl.

The shuttle is shown at I-I and is arranged to reciprocate in the inclined shuttle box or race I, being actuated therein by suitable mechanism, which may be and conveniently is substantially similar to that in said Goodyear machine.

In accordance with the present invention the shuttle-race I is provided with a threadguide, which receives the shuttle-thread as the shuttle is retracted and supports the same Within the path of motion of the needle-that is, Within the circle which would be formed by t-he rotation of the needle on its segment center.

The threadguide above referred to, as shown in Figs. l and 2, consists of the angularly-bent rod or finger i, one end of which is secured to the shuttle-race I upon one side of and adjacent to the rear of the shuttle and which extends vertically and laterally, (toward the front of the machine), and the forward end of which is secured to the front portion of the shuttle-race. The position of the angularly-bent rod or finger e' is such that as the shuttle falls it receives and retains the shuttle-thread and supports it within the path of motion of the needle. It will be noted that the laterally or forwardly extending portion of the rod or finger t is arranged at such an angle that the thread will not slip oif of said finger.

As shown in Fig. 3, the thread-guide consists of a shoulder i2, formed upon the shuttle box or race I, the upper edge ofthe shoulder i2 being arranged to receive and support the thread substantially in .the manner in which the same is supported up on the angular rod or finger t', as hereinbefore described.

The operation of the machine of the drawings, in so far as the same is material to the present invention, is described as follows: The shuttle being in its retracted position, and the thread being held by the threadguide within the path of motion of the needle, the needle draws up a loop of thread outside of the shuttle-thread or, as shown in the drawings, under said thread, which loop is taken from the needle by the thread-retainer, and while the loop is still closed the shuttle moves vIo upward from its retracted position to a position above the loop,passing outside of the loop.

The loop is then opened by the spreader, and

the shuttle returns to its retracted position, L

passing through the loop and carrying its thread through the same, after which the stitch is set in the usual manner.

It will be noted in connection with the foregoing that if the shuttle-thread is allowed to fall outside of the path of motion of the needle before the needle brings up the loop the lock-stitch will be formed with a twist in the shuttle-thread or supply-thread, which will prevent said threads from properly rendering about each other to position the lock in the material; but as provided with my improved thread-guide the shuttle-thread is always held within the path of motion of the needle while the loop is being brought up, so that the lock-stitch is formed without any twist either in the shuttle-thread or the supply-thread, a result which enables the loop to be accurately positioned in the material.

I would say that I am aware that it is not novel to form a lock-stitch without a twist in the shuttle-thread or supply-thread, but in so far as I am informed of the state of the art it is novel in a machine embodying a reciprocating shuttle and a circular needle to secure such result by supporting a shuttlethread within the path of motion of the needle.

I therefore claim as novel and desire to secure by Letters Patent of the United Statesl. In a shoe-sewing machine, the combinal'tion with a reciprocating shuttle and a circular needle movable in substantially parallel planes, of means for actuating the shuttle and needle, and a thread-guide arranged to support the shuttle-thread within the path of motion of the needle while the shuttle is in its retracted position, substantially as described.

2. In a shoe-sewing machine, the combination with a reciprocating shuttle, of a circular needle and its actuating mechanism, and a shuttle-race provided with a threadguide arranged to support the shuttle-thread within the path of motion of the needle while the shuttle is in its retracted position, substantially asV described.

In testimony whereof I afliX my signature in presence of two witnesses.

VILLIAM H. CURRIER.

Witnesses:

A. E. IVHYTE, A. O. ORNE.