US645424A - Fair-stitch machine. - Google Patents

Description

(No Model.)

' Patented Mar. I3, 1900. E. F. MUWER.

FAIR STITCH MACHINE.

(Application led May 11, 1899.)

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Unrrnn STATES EDWIN F. Ol/VER, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO CHARLES P. STANBON, OF LYNN, MASSACHUSETTS.

FAIR-STITCH MACHINE.

SPECIFICATION forming part of Letters Patent No. 645,424, dated March 13, 1900.

Appnmion ineanty 11, 1899. serai No. 716,452. (Numan.)

To @ZZ when?, it may concern:

Be it known that I, EDWIN F. Mownn, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Fair-Stitch Machines, of which the following, taken in connection With the accompanying drawings,is a specication.

Y My invention relates to that kind of sewingmachines that are called fair-stitch machines; and it consists in a novel device for releasing the thread from the needle and temporarily holding the doubled thread while the mechanism for forming the next stitch is in operation. The objects are to obtain a certainty of action, a better result, and a saving of thread. These objects I attain by the mechanism shown in the accompanying drawings, in which- Figure 1 shows in front elevation the working parts of a fair-stitch machine. Parts are shown in vertical section to illustrate the stitch formation. Fig. 2 is the same as Fig. l, except that some of the parts are shown in different positions; Figs. 3 and 4, plans showing the throat-plates and connected parts, the moving parts being shown in different positions. Figs. 5, 6, 7, and 8 are sectional sketches showing the positions of the needle and the other thread-operating devices as they appear in connection with the edge of the sole, the observer looking from the right side of the machine.

In the drawings only such portions of a fairstitch sewing-machine are shown that have a direct relation to the work to be accomplished.

The awl B -is adjustably attached to the awl-bar B and has a vertical motion only, its sole function being to puncture the sole for the passage of the needle and thread. The presser-foot A and thread-carrier C C' are of ordinary construction and need not be described.

The machine is provided with a threadlocking device, which may be located at P, and the usual tension, take-up, and other devices common to machines of this class are added.

The feed-post D has a swinging lateral motion, which is imparted to the needle N, which also has a vertical motion, and not only manipulates the thread, but feeds the sole stitch by stitch.

The novel fea-tures of this machine consist of the following-described parts: A rockerarm E has an earpiece E3, by which it is pivoted by a screw-pivot E2 to the throat-plate L. This rocker-arm E has a projection E', by which itis pivot-ally connected at D2 to a link D and through said link and pivot D5 to needle-feed post- D, so that as the feed part D moves to the right or left the rocker-lever E will partake of its motion. The rocker-arm E has adjustably connected to it a bent retaining-iing'er K K and a loop-placer H. The bent end K of the finger K K' moves in a horizontal plane across the needle-opening in the raised part L of the throat-plate L and serves to temporarily holdthe loop of the thread of one stitch while the mechanism is operating to complete the said stitch and to form the next. The loop-placer H also moves in a horizontal plane, but is under the throatplate L.

The operation of my machine may be set forth as follows: The boot or shoe to be operated upon is placed upon the raised part L of the throat-plate, its sole S occupying the position shown in the drawings. The presser- Afoot is let down and the machine started, the

rst operation being to puncture the sole by the awl B. Now the needleN passes upward through the hole in the sole made by the awl. Then the thread-carrier C places the thread in such a position that the hook of the needle N engages with it, and as the needle moves downward the thread is pulled through in the form of a loop, as shown at T2, Fig. 1. Next the needle moves to the right and at the same time the loop-placer H passes over the top of the needle, taking the loop from the hook of the needle and carrying it out of the line of the needle. (See Fig. 6.) Now the needle rises and passes through the puncture made for the next stitch and feeds to the left, taking the sole With it. While this feeding action is going on the bent retaining-finger K passes into the loop. (See Figs. 7 and 8.) Now the thread is locked at P, and the return motion of the thread-carrier C draws the loop up against IOO.

'the thread, doubled so as to form a loop,

through the stock, and mechanism for operating the awl and needle; a loop-placer adapted to take' the loop from the needle and place it in the path of motion of the loop-retainer; a loop-retainer adapted to engage vith and prevent the doubled thread from being drawn back through the puncture in the stock; 'a mechanically-moved rocker-arm adapted to give motion to the said loop-placer and loopretainer; and a threadcarrier, adapted to place the thread in the barb of the needle, and also to draw the thread back to the nnder surface of the stock after the needle has taken it through and beyond the said surface, and a tension mechanism whereby a stitchlike ornament is formed; substantially as and for the purpose set forth.

2. Afair-stitch machine, comprising an awl, a. barbed needle, a thread-carrier, and mechanism for operating said awl, needle and thread-carrier; in combination with a loop'- placer, and aloop-retainer, both connected to and operated by a rocker arm; and said rocker-arm, and mechanism for operating the said arm; substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing Witnesses, on this 10th day of May, A. D; 1899.

EDWIN F. MOW'ER.

Vitnesses: l

FRANK G. PARKER, WILLIAM EDsoN.

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