US25059A - Improvement in sewing-machines - Google Patents

Description

2 Sheets Sheet 1.

G.- s. TAPLEY.

"Sewing Machine.

Patented Aug. 9, 1859.

Inventor:

-W'itnesses:

JJM

- 2 Sheets-Sheet 2. G. S. TAPLEY.

' Sewing Machine. No. 25,059 Patented Aug. 9,1859.

.Wjgzoesses Inventor:

s. Phnm-Lahe n w, Wumn m. D. C.

side of the machine. Fig. 2 is the machinery 1 f, to receive the shuttle, there being a notch at Ihsrrna S'rarns G. s. TAPLEY, or BRISTOL, CONNECTICUT.

IMPROVEMENT IN SEWING- MACHINES.

Specification forming part of Letters Patent No. 25,059, dated August 9, 1859.

To all whom, it may concern.-

Be it known that I, GEORGE S. TAPLEY, of Bristol, Hartford county, Connecticut, have invented certain new and useful Improvements in Sewing-Machines; and I do hereby describe and ascertain said inventions and their mode of operation, referring to the accompanying drawings, in which- Figure l is a perspective view of the upper at the rear or sewing end of the machine. Fig. 3 is a plan of the under side of the machine. Fig. 4 is the shuttle and spool separated. Fig. 5 is the upper feed-cam.

I will indicate the various parts of my machine, referring to the drawings, without minutely describing the same.

a a is the table, 011 the rear end of which there are proper standards to sustain the axis of the needle-arm I).

c is a high standard, on top of which there is a compound joint, by which the feed-arm d is sustained, as clearly seen in Fig. 1. A rear arm, d, (see Fig. 2,) serves to vibrate it by means of the cam (1 (seen in Fig. 5,) this cam being on the driving-shaft e, and forming also the driving-pulley. The driving-shaft 6 extends under the table to near the front of the machine, and bears on its front end a socket,

h in its rim, that receives a projecting boss, 2', on the shuttle, by means of which the shuttle is made to revolve with the driving shaft.

g is a cup-formed receiver on a line with and opposite socket f, for keeping the shuttle in place. The stem of this cup is held in a socket, n, by a set-screw, so as to be brought up into place to hold the shuttle, or back to release it. The socket is affiXed to an arm 011 a slide, m, that slides parallel to the drivingshaft. The movement of this slide m is governed by a cam, 02, on the driving-shaft, just behind the socket f, that has a cam-groove around its periphery, into which a pin, 0, on the slide m fits.

The operation of these parts is to hold the shuttle tight during a portion of the revolution, so as to produce the necessary friction thereon and allow it a loose play as it casts off the loop. The-shuttle has a recess in one 7 side to receive the spool of thread or silk, the

end of which thread passes out through a hole at p in the side of the shuttle, and if the tension at this point is to be increased, two or more similar holes are to be made through the rim of the shuttle, to lace the thread through before passing off. From the last hole through which the thread is passed, it runs to the center of the shuttle, through a hole, r, in which it passes, and thence off to the work. This carrying the thread to the center is very important to equalize the tension thereof, the thread being guarded from touching the spool after it passes out through, the shuttle or bobbin, especially at the center, which would otherwise cause the spool to bind and deliver the thread with unequal tension. Passing the thread through the center of the spool has before been done, and is therefore not'new or claimed as such by me; but'passing the thread through the center of the bobbin or shuttle, guarded so as not to touch the spool, and thus leave the spool free, 'is new and useful.

The needle and other undescribed parts of the machine work like other well-knownv machines. When the needle descends to its lowest point and commences returning, a hook, the peculiar form of which isdelineated at S, Fig. 4, catches into the loop, and by its revolutioneasts it over the shuttle. At the time the hook seizes the needle-loop it is held firm in its position by the pressure of cup 9; but as it revolves, cup 9 falls back and allows the loop a free and unobstructed passage over the shuttle. This operation is repeated at every stitch.

In order to feed either the upper. or lower portion of cloth faster or slower independently of the other portion, I move the upper and lower jaws of the feed independently of each other. The movement of the upper jaw is already described. The lower one consists of a slide-plate, :10, which slides in the upper sun face of the table and flush with it. This plate as has a projection downward from the under side, (seen at y, Fig. 3,) which is made to press against a cam, .2, on the driving-shaft. By means of a spring, w, this slide has its motion adjustable by a set-screw, 'v, to vary its range, and its movement is entirely independnt of the movune nt' of the upper jaw of the 2. The construction and arrangement of the zed, but can be made to work in, unison with feed apparatus, as and for the purpose herein 1 or Vary therefrom. set forth.

I claim- G. S. TAPLEY. 1. The movable cup 9 and its appendages, itnesses:

)r gripping and automatically releasing the JAs. \V. FRASER,

huttle at intervals,substantially as specified. A. XVORTH.

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