US524986A - Shoe-sewing machine - Google Patents

Description

' (No Model.) 2 Sheets-Sheet 1.

. E. E. BEA

SHOE SEWING MA E. No. 524,986 Patented Aug. 21, 1894.

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E. E. BEAN.

SHOE SEWING MACHINE No. 524,986. Patented Au QZl, 1894.

UNITED STATES PATENT OFFICE.

EDWIN E. BEAN, OF BOSTON, MASSACHUSETTS.

SHOE-SEWING MACHINE.

SPECIFICATION forming part of Letterslatent No. 524,986, dated August 21, 1894. Application filed A ril is, 1894.. Serial No. 507,431. (No model.)

.To all whom it may concern.-

Be it known that I, EDWIN E.'BEAN, of Bos ton, in the county of Suffolk and State of Massachusetts, have invented anew and useful Improvement in Shoe Sewing Machines, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to attachments to be combined with the working parts of a shoe sewing machine described in Letters Patent of the United States No. 513,048, dated Jan uary 16, 1894, subject, shoe sewing machine, the object being to make a shoe sewing machine that will rapidly make a lock stitch having two threads, one of which only goes through the stock. This object I attain by means of the mechanism shown in the accompanying drawings, in which Figure 1 is a view in elevation showing the principal parts of a shoe sewing machine, having my improvements. Fig. 2 is a perspective view showing the stitch forming parts, the stitch being" partly formed. Fig. 3 is a perspective view showing the stitch forming parts, the stitch being about complete. Fig. 4 is a perspective view showing a part of a shoe, illustrating the stitch and the method of making it.

In the drawings, A represents a part of the derstanding of the working of the stitch for m-.

ing appliances. The mechanism for operating such parts may be of the kind shown and described with patent above referred to, or of any desirable construction.

B is a lever pivoted at B to the frame A of the machine; a thread clamp B is rigidly attached to the front end of this lever byscrews B B or otherwise.

O C is a pendent arm pivoted to the lever B at 0. down with the front end of the lever Band has in addition a swinging movement imparted to it by the link 0 which is operated by a cam or other suitablemechanism; a plate 0 is attached to the front of the arm 0 C and This arm 0 0 moves bodily up and is so curved and arranged that it, together with the arm 0 0 forms a thread holder and carrier for the second thread S.

"For convenience in'description, I designate the thread S, the second thread. This thread forms the bite (see S S Fig. 4) and engaging with the loop T T of the thread '1 (first thread) and makes a lock stitch of it. The second thread passes downward in a channel made on the under side of the arm 0 G and is pushed forward in said channel by the thread pushing arm E. This pushing forward of the thread S causes it to form a loop S S in front of the end of the carrier C which forms a bite or look for the stitch formed by the first thread T. The pushing forward of the second thread to form the bite is effected by the following described device: The thread pushing arm E E is pivoted at D to the lever D while the said lever D is pivoted in turn to the pendent armOO at D and has an arm D attached to it, so arranged that as the pendent arm 0 is moved downward by the lever B and inward by the link 0 the arm D will come in contact with the pin A which will stop its downward movement and thus cause the lever D to swing so as to throw its lower end inward; this action will carry the feeder E in the same direction, which in turn will take the second thread with it and thus form the loop or bite S S. The feeder E E is held in contact with the thread by the spring F. Now the loop-bite being formed as shown in Fig. 2, the loop-bite holder H will descend so as to enter and hold the loop-bite as shown in Fig. 3. The pendant arm O C will be swung outward by the motion of the link 0 This movement will cause the thread to be drawn taut, since the part S is held by a previously made stitch, and that part of the thread that. is between the holder H and the reel S will be clamped and held by the clamp plate B and the pendent arm G; for the reason that the clamp B is relatively stationary while the arm 0 O is made to swing against it, thus pinching the thread S and giving it the required tension for insuring the proper j drawing up of the loop-bite. The lever D is held in its normal position by a spring D and a pin which limits the movement of the upper end D of the lever D.

While the above described formation of the loop-bite from the second thread S has been taking place, the stitch from the first thread T has also been made as I will now explain.

The thread Tor first thread comes through the looper k which passes it around the point of the needle 11 so as to engage with the hook of the needle; now the needle retreats and draws the thread through the stock and forms a long-loop T T (Fig. 2); this loop is thrown off the hook of the needle by the cast-oh. e

and immediately the take-up (not shown) op-' the lever B, carrying the thread clamp B and the pendent arm C O pivoted to the lever B, and adapted to swing back and forth in re1ation to the thread clamp B and therewith form a tension device for the thread S 8*; with the clamp B substantially as and for the purpose set forth.

2. In a sewing machine, the combination of the lever B, carrying the'thread clamp 13* and the pendent arm 0 O pivoted to the lever B and having attached to it a plate 0 adapted to act in connection with channeled part 0 of the arm 0 G as a thread-holder and carrier; with the lever D pivoted to pendent arm 0 0, thread pushing arm E, arm D attached to said lever D and pin A all adapted to operate together 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 th day of March, A. D. 1894.

. EDWIN E. BEAN.

Witnesses: I

FRANK G. PARKER, FRANK G. HATTIE.

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