US233559A - scott - Google Patents

Description

3 Sheets--Sheet 1 J. R. SCOTT. Machine for Sewing Boots and Shoes. No. 233,559. 1 P nted Oct. 19,1880.

WITNESSES: INVENTOE ATTORNEYS.

N. PETERS, PKOTO-LITHOGRAPNER, WASHINGTON. D C.

- 3 Sheets-Sheet} 2.

J. R. SCOTT. Machine for Sewing Boots and Shoes. No. 233,559.

5 Pa tented Oct. 19,1880;

WITNESSES: INVB TOR: 5/ MK H W 7r [2 [yank/(7 N.PETER5. PHOTO-LITHOGRAPHER, WASHINGTON, D C

= TTORNEYS 3 Sheets-Sheet; 3.

J. R. SCOTT. Machine for Sewing Boots and Shoes. No. 233,559. Patented Oct. 19, I880.

VM- I WITNESSES: INVENTOR: zazajdf' 1 01% c L/; 6 I a. @W W ATTORNEYS.-

NITED STATES FFICE.

JACOB R. SCOTT, OF NYAOK, NE\V YORK, ASSIGNOR TO HIMSELF AND ANDREW H. JAOKMAN, OF SAMEPLAOE.

MACHINE FOR SEWING BOOTS AND SHOES.

SPECIFICATION forming part of Letters Patent No. 233,559, dated October 19, 1880.

Application filed December 19. 1879.

To all whom it may concern.-

Be it known that I, JACOB R. Scorn-of N yack, in the county of Rockland and State of New York, have invented new and useful Improvements in Machines for Sewing Boots and Shoes, of which the following is a specification.

My improvements relate to machines for sewing boots and shoes.

The object of my invention is to furnish a machine that will meet the peculiar requirements of that class of work without complicated mechanism; and the invention consists, specially, in the mechanism for tightening the stitch, whereby the layers of leather shall be tightly drawn together, and also in the looping mechanism for forming the stitch, the construction and operation of which parts I will particularly describe with reference to the accompanying drawings, which show my improvements in connection with such other parts of the machine as are necessary in understanding the operation.

In the drawings, Figure 1 is a side elevation of the machine. Fig. 2 is a front elevation, partially in section. Fig. 3 is a section vertically through the end of the horn, and showing the looping mechanism. Fig. 4 is a top view of the looping device. Fig. 5 is a section showing the relative position of the needle and looper at the extreme downward position of the needle. Fig. 6 is a view of the same parts at right angles to Fig. 5, showing the. needle raised. Fig. 7 is a plan view of the tension device for the thread-spool. Fig. Sis an inverted plan view of the same. Fig. 9 is an opposite side elevation to that of Fig. 1, with the balance-wheel removed and the feet broken off.

Similar letters of reference indicate corresponding parts.

The horn A is sustained upon a bed, B, that is fitted to revolve, and which carries upon a vertical pin, a, the spool b for the thread. 0 is the needle in bar (I, operated as hereinafter described, and e is the presser-foot upon the lower end'of post f. The thread-loopin g mechanism is fitted in the end of the horn A, and will be next described.

In the end of horn A, which revolves freely in a horizontal direction, is fitted a tube, 9,

forming a socket-piece, in which the looper 7b is hung. The top of tube 9 is covered by a plate that is apertured for the passage of the needle, and extends to a form on arm it, upon which the work will rest.

The looper h, as shown clearly in Figs. 3, 4. and 5, consists of a plate or block of metal with a projection, 71, extending at right angles and apertured for the passage of the thread, the two portions forming an angular block that is hung loosely in tube 9 by a cross-pin, 7c. The looper h is held while the needle is descending in the position shown in Figs. 3 and 4 by the tension of the previously-formed stitches, and is thrown down to the position shown in Fig. 5 by the needle, whereby the thread is thrown above the needle-hook, where it is held by the projection t of the looper. At the upward movement of the needle it carries the thread up to form a new loop, at the same time raising the looper and drawing the thread from the spool.

As well understood in sewing boots and shoes, it is essential that the loops be drawn tightly, and as the thickness of material is.

constantly varying automaticallyacting devices have been used to vary the stroke of the needle, according to the thickness of the material. My looping devices may be used in connection with any such devices; but I prefer the mechanism as hereinafter described.

Upon the pin a, carrying the spool b, is a three-armed plate, 5, that is titted with pads l, of leather or othersoft or elastic material, upon which pads the lower head of spool b rests. A nut, b, is fitted on the upper end of pin a, by which the spool may be pressed upon the pads I, so that the spool b and plate l will be connected by friction and will turn together.

To the plate 1 is connected one end of the spring m, that is attached by its other end to the horizontal portion of the horn A, from which pin a rises. The springm is connected in such manner that it tends to turn plate Z, and with it the spool, in a direction to wind the thread, the movement of plate I in the other direction being checked by a pin, m.

It is to be noticed that the tension required for the thread is given by the friction of the pads I, while the spring at will act to draw back any surplus length of thread in case more is drawn off than is required to form the loop. These parts should be adjusted so that as the needle rises and the spool turns to draw off the thread the first effect is to draw out the spring at until its tension is greater than the friction between the pads l and the spool, or until the plate Z is stopped by the pin m, when the spool will slip until the needle has completed its upward movement, and the spring m will then act to draw back the spool, and thus take up or tighten the thread. Thus it will be seen that, the needle havingits stroke adjusted for the greatest thickness of material, any looseness of stitches by thinner materials or soft places in the material will be prevented, as every stitch will be drawn tightly.

I have shown mechanism for automatically varying the stroke of the needle according to the variations in the thickness of material passing between the horn and presser-foot. This mechanism may be preferable in some kinds of work, especially fine work. For the reason that no rest is required at the completion of the downward stroke of the needle, I am enabled to use for this purpose much simpler devices than heretofore required.

The needle-bar is hung by means of a connecting-rod, e, on the end of a lever, 71, that is rocked by an eccentric, 0, which lever is pivoted on a fulcrum-post, 19, that is fitted for vertical movement and carries the levers q q, through which the presser post or bar f passes. The lever q is moved by a cam to raise the presser-bar after the feed is given, and lever g, by its cam, gives pressure on bar fthrough the spring'r, that is around barf. These movements are as usual.

Above the bar, in suitable supports, is titted a rock-shaft, w, that carries a spring-arm, s, projecting in the path of the barf, and upon the same shaft is fixed an arm, 13, that is connected by alink, .T, with a Wedge-shaped slide, a, fitted to move on the top plate of the machine, beneath an inclined projection, p, on fulcrum-postp. These parts form a crank-lever that is operated every time the presser-bar f rises to move the slide a beneath the projection 19 and raise the post p bodily more or less, such movement being varied necessarily by the thickness of the material beneath the presserfoot. The movement of post p upward necessarily raises the fulcrum of lever n, to which the needle-bar is hung, and increases the stroke of the needle. spring, a.

The slide it is withdrawn by a The socket-piece g and looper h are maintained in the same relative position to the needle by the revolving horn A. In some instances it may be desirable to use a stationary horn; then the socket is made to revolve freely in said horn, in order that the looper may be held in the same relative position to the needle by its arm h, which conforms generally to the shape of the sole and will move with the shoe.

The machine above described may be used for sewing boots and shoes with or Without a groove, and is especially adapted for sewing without a groove.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent 1. In a sewing-machine, the three-armed plate I, provided with pads l, the spring on, and the pin m, in combination with the spool b, the horn A, and the looper h, pivoted in an aperture in the end'of the horn, substantially as and for the purpose set forth.

2. In a sewing-machine, a rocking looper constructed substantially as herein shown and described, and pivoted in an aperture in the end of the horn, in combination with the needle and mechanism for reciprocating it, substantially as and for the purpose set forth.

3. The rocking looper h, having the projection '5, which is provided with an aperture for the passage of the thread, in combination with the socket g, the horn A, the needle 0, and mechanism for reciprocating it, substantially as and for the purpose set forth.

4. The socket g, provided with the arm h, and the looper h, pivoted within the said socket, in combination with the horn A, the needle 0, and mechanism for reciprocating it, substantially as and for the purpose set forth.

5. The combination of the fulcrum-postp, provided with inclined projection 10, the wedgeshaped slide a, and the spring a with the link m, rock-shaft w, arms 8 t, lever n, needle-bar d, and presser-foot barf, substantially as and for the purpose set forth.

6. The combination of the presser-foot bar f, spring 1", levers q q, arms 8 t, rock-shaft w, link 00, wedge-shaped slide u, and spring a with the fulcrum-post 19, provided with the inclined projection 19, lever n, and the needle-bar d, substantially as and for the purpose set forth.

JACOB R. SCOTT. Witnesses:

Gno. D. WALKER, O. SEDGWIGK.

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