US673930A - Harness-sewing machine. - Google Patents

Description

No. 673,930. 1 Patented May 14, l90l. S. SIMON.

HARNESS SEWING MAUI-"NE.

(Application filed July 10, 1900.; (No Model.)

UNTTED STATES PATENT EEICE.

SIEGMUND SIMON, OF IDAGROVE, IOWA.

HARNESS-SEWING MACHINE.

:aLEEGlZLElGA'IION formingpart of Letters Patent No. 673,930, dated May 14, 1901. Application filed July 10, 1900. Serial No. 23,081. (No model.)

To a. whom it may concern.-

Be itknown that I, SIEGMUND SIMON, a citizen of the United States, residing at Idagrove, in the county of Ida and State of Iowa, have invented certain new and useful Improvements in Harness-Sewing Machines, of which the following is a specification.

This invention relates to and consists in certain improvements upon a harness-sewing machine for which United States Letters Patent were issued to Jacob G. Eicholtz on August 8, 1899, No. 630,335.

My object-is to provide simple, durable, and inexpensive means for adjusting the position of the device for releasing the thread-holder, whereby the tension of the stitches may be adjusted to a nicety and the machine adapted for sewing articles of varying thicknesses.

My invention consists in the construction of the device for releasing the thread-holder and in the arrangement and combination thereof with the harness-sewing machineabove noted, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which-- Figure 1 shows in perspective a portion of the machine-frame with needle-bar therein, the means for operating the needle-bar, the thread-holder, and the adjustable device for releasing the thread-holder. Fig. 2 shows a vertical transverse sectional View through a portion of the machine-frame and through the device for releasing the thread-holder to illustrate the construction and arrangement of said device within the frame. Fig. 3 shows a detail perspective view illustrating a modified form of thread-holder-releasing device.

Referring to the accompanying drawings, I have used the reference-numeral 10 to indicate that portion of the machine-frame shown. Slidingly mounted in the frame 10 is the needle-bar 11, and in the outer end of the needle-bar the needle 12 is detachably secured by means of the set-screw 13. Pivoted to a portion of the frame 10 is a link 14:, and to the other end of this link is pivoted a lever 15, and said lever is pivotally connected to the needle-arm, by which means it is obvious the needle-bar may be reciprocated in the frame.

The thread-holder comprises a rod, preferably made of spring metal, fixed at one end to the needle-arm and projected straight up wardly therefrom a short distance and then horizontally parallel with the needle-arm and passing through an opening in the frame to a point adjacent to the end of the needle-arm. This device is indicated by the reference-numeral 16. An inclined shoulder 17 is formed in the part 16 near its end, and beyond the shoulder the end is bent downwardly to enter the opening in the needle-arm.

In practical use, as will be seen by reference to the above-noted patent, the thread is passed through the eye of the needle and then through the opening in the needle-bar, into which the end of the thread-holder is placed. Then as the needle-bar is reciprocated and the shoulder 17 engages the frame the threadholder is forced upwardly until its end is withdrawn from the opening in the needlebar and the thread released. The said threadholder is normally held, by reason of its resiliency, with its end in said opening and in engagement with the thread passed through the opening, thereby securely clamping the thread at that point. In'my present improvement this operation is'similar tothat shown and described in the above-noted patcut.

The adjustable device for releasing the thread-holder comprises a metal sleeve, (indicated by the reference-numeral 18,) which sleeve is slidingly mounted in the opening of the frame 10, through which the thread-holder is passed. This sleeve is of such proportion that when the needle-bar is reciprocated the sleeve will strike the shoulder 17 of the thread holder and elevate it as required to release the thread. Seated in the frame 10 adjacent to the sleeve 18 is a set-screw 19, the inner end of which is designed to engage the said sleeve. Obviously this sleeve may be projected any desirable distance in advance of the frame 10 and by means of said set-screw clamped in said position. As hereinbefore noted, the thread is released from the threadholder when the shoulder 17 of the threadholder strikes against the end of the sleeve. Hence it is obvious that if the sleeve is projected a considerable distance beyond the frame the thread-holder will be released at an earlier point in the stroke than if the sleeve were flush with the surface of the frame.

In practical operation and assuming that it is desired to sew comparatively thick leather the sleeve is adjusted to a position a considerable distancein advance of the frame. Then upon the return movement of the needle through the leather the thread is held in the thread-hold er until the stitch is drawn tight and is then released, whereas if thinner leather were used it would be desirable to draw the thread through the leather on its return movement until the stitch were drawn tight before being released. It is obvious that in the latter instance the needle should travel farther before the thread is released than in the former case. Hence when thick leather is being used the sleeve is projected beyond the frame a distance proportionate to the thickness of the material being sewed. This distance to which the sleeve is projected is easily determined by experiment, and, furthermore, it is obvious that even if the same leather were used stitches of difierent degrees of tension may be sewed by an adjustment of said sleeve.

In the modified form shown in Fig. 3 I have shown a set-screw 2O seated in the sleeve and projected through a slot 21 in the frame, which slot is disposed longitudinally of the needle-bar. On the lower side of the slot I have provided a series of notches 22, into which the set-screw 20 may be passed. By this means the operator may grasp a set-screw and force it upwardlyinto the slot 21. Then he may move the set-screw, together with the sleeve, longitudinally within the slot to the desired position and then pass the set-screw downwardly into the adjacent notch 22 and then turn the set-screw and securely clamp the sleeve in position. of the notches 22 positively lock the sleeve against longitudinal movement.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States therefor, is

1. In a harness-sewing machine, the combination with a frame, a reciprocating needlebar having a thread-opening therein and a thread-holder comprising a spring-actuated rod fixed at one end to the needle-bar, passed through the frame and having an inclined shoulder, and also having its free end normally held by the resiliency of the bar into the said thread-opening, of a sleeve slidingly mounted in the frame to surround the threadholder, and a set-screw seated in the frame to engage said sleeve, for the purposes stated.

2. In a harness-sewing machine, the combination with a frame, a reciprocating needlebar having a thread-opening therein and a thread-holder comprising a spring-actuated rod fixed at one end to the needle-bar, passed through the frame and having an inclined shoulder, and also having its free end normally held by the resiliency of the bar into the said thread-opening, of a sleeve slidingly mounted in the frame to surround the threadholder, and adjustable means for holding said sleeve, for the purposes stated.

SIEGMUND SIMON.

Witnesses:

J. ELKINTON, J. RALPH Onwre.

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