US767666A - Shoe-sewing machine. - Google Patents

Description

PATBNTED AUG. 16, 1904.

E. SMITH. SHOE SEWING MACHINE.

APPLIOATLOH FILED we. a, 19m. no nonnn.

4- SHEETS-SHEBT 11 1X i cmeooao No. 767,666. PATENI'ED AUG. 16, 1904.

I B. SMITH.

SHOE SEWING MACHINE. APILNATIOH rmzn ma. 8, 1901.

N0 MODEL. 4 SHEETS-SHEET 2.

i L 2 1 g I n r I lllll l l I P ATENTED AUG. 16, 1904.

E. SMITH, SHOE SEWING MACHINE.

APPLICATION FILED AUG. 8, 1901.

4 SHEETS-SHEET 3.

N0 MODEL.

w m m No. 767,666. PATENTED AUG. 16

E. SMITH.

SHOE SEWING MAGHINB.

APPLICATION" FILED AUG. 8, 1901.

NO MODEL.

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Patented August 16, 1904:.

UNITED STATES PATENT OEEIcE.

EUGENE SMITH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF TVVO- THIRDS TO THOMAS H. TAYLOR, OF WILMINGTON, DELAWARE.

SHOE-SEWING. MACHINE.

SPECIFICATION forming part of Letters Patent No. 767,666, dated August 16, 1904.

Application filed August 8, 1901.

To all whom, it may concern:

Be it known that I, EUGENE SMITH, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Shoe Sewing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make This invention relates to sewing-machines, and particularly to machines which make a lock-stitch.

The object of the invention is to provide a machine for sewing welts to the uppers and insoles of boots and shoes and also forstitching the welts to the soles which will make a strong and durable seam and will be simple in its parts and operations.

The features of novelty will be hereinafter described in detail and then pointed out in the clauses of the claim.

In the drawings accompanying this description, Figure 1 is an elevation of the right-hand side of the machine, parts being shown in sections. Fig. 2 is a top plan. Fig. 3 is a front elevation. Fig. 4 is an elevation same as Fig. 1, showing the parts in different position. Fig. 5 is an elevation of the left-hand side of the machine, a portion of the cam-disk A being broken away to show clearly the conformation of the groove for actuating the awl. Fig. 6 is a plan showing in detail the awl mechanism, and Fig. 7 is a front elevation showing portions of the awl-actuating mechanism in detail.

The frame of the machine is designated generally by F and has at each side thereof an angular extension f. The main shaft S is supported by and journaled in said extensions at the angle thereof, and a counter-shaft s is' journaled in the free ends of said extensions; The frame also has an upright f at the front in and by which certain parts are journaled and supported, as hereinafter described.

Two disks A and B are suitably secured to, so as to rotate with, the main shaft. The

disks embody all the various cam-grooves Serial'No. 71,325. (N0 model.)

which are instrumental in actuating the sev- 5 eral parts of the machine. The counter-shaft affords a journal for and supports the needle,

take-up, and hook-actuating levers.

Journaled in the upright f is a tubular shaft 02., having near the outer end two arms,

the one 92/ having suitably clamped thereto a curved hooked needle 71 and the other, u being connected by a link n journaled, as stated, and carrying between its ends a roller, which travels in the cam-groove n of disk B. The

needle is arc-shaped and has its hook on the outside of the arc. The tubular shaft n is cut awayat of both circumferentially and longitudinally to a considerable extent for the purpose of permitting the independent 5 movements of the awl-carrying shaft, as hereinafter explained.

The take-up lever is indicated by t, is journaled, as stated, and carries a roller between its ends, which travels in the cam-groove t 7 of disk B. The lever t has journaled in its outer end a thread truck 6 around which the needle-thread 12 runs to the looper Z.

The oscillating hook it, which takes the loop of needle-thread and passes it around the bob- 75 bin-case containingthelower or lockingthread, is formed on and projected radially and laterally from a carrier or disk 7t, secured in any suitable way to the outer end of a short shaft 7Z2, journaled in a bracket 72, of the upright f.

The inner end of the shaft 7L2 has secured to it a pinion h", with which meshes a segmental rack 72,5 on the free end of a lever 7L6, journaled, as stated. Lever it carries a roller between its ends which travels inthe cam-groove [L7 in 5 is slotted at Z for cooperation with its supporting-screws and is connected by a pin at its rear end with a slot in the upper end of a ver- The shank Z of the looper tical lever Z, pivoted to the frame at Z, and carrying between its ends a roller which travels in a cam-groove Z in disk A. The looper has a thread-guiding aperture in its outer end, which latter is extended horizontally from the downwardly and outwardly and laterally extending portion Z of the shank. The particular conformation is given to the shank of the looper in order to locate the same beside the path of the needle and just below the upper limit of its movement. The thread a from the supply extends between the two jaws of a thread-grip G over a thread-guiding truck 9, journaled in or near the wax-pot 9', under another truck 9 near the bottom of said pot, up through a stripping-guide g at or near the top of said pot, over the truck 6 on the end of the take-up lever, and thence downwardly to and through the end of the looper Z.

The work-rest is shown at W and is supported by an arm secured to the front of the upright f. Such rest extends into the path of the needle and awl and is provided with an enlarged opening to for the passage of the needle and awl and to permit of the lateral or feed movement of the latter.

The bobbin-case 7) is of ordinary form, has a thread-aperture in the periphery thereof, and is supported in place against the face of the disk h by a holder 6 of cup shape, having a bobbin-case-supporting ledge 6 The holder is hinged to a bracket-arm b on the frame and isheld vertically in place by aspring or rigid latch Z)", held by a screw Z1 tapped into the bracket-arm.

W is a welt-guide suitably supported on the upright f, which guides the welt to the stitching-point.

The thread-grip G consists of a stationary jaw carried by a bracket Gr, fastened to the frame in rear of the main shaft, and a pivoted jaw 9 located below and cooperating with the jaw g. Jaw g is pivoted at g to bracket G and has an enlarged tubular upper end or head g Through the tubular end extends a screw-threaded pin g swiveled to or bearing upon at its inner end a short bar 9 which slides in a squared socket in said end g and has an antifriction-roll which bears upon the periphery of disk B and cooperates with a cam-depression g thereiu. The outer end of the screw-pin g has a suitable manipulating-head g. The major portion of the weight of the pivoted jaw is so disposed as to cause the jaw normally to fall away from stationary jaw 9', thus permitting the free passage of the thread and to cause the roll to tend to fall into the cam-depression g. Obviously a spring to cause the same result suitably cooperating with the pivoted jaw would be a mechanical equivalent.

The work is punctured and fed by the awl a, the mechanism for actuating which in its best form to accomplish the two functions perfectly and easily is clearly shown in Figs.

5, 6, and 7. In these figures the awl ais shown as provided with a flat angular shank (0, held by a screw to the upper or outer end of a supporting pin or post (62, carried by a short horizontal shaft (4", journaled in the tubular needlecarrying shaft n. The awl-post (6 extends through and plays in the slota of the needleshaft. Extending laterally from the angular shank a is a short pin or journal at, which plays freely in and is guided by a slot a in a depending head a of the awl-actuating lever (4 The head a is carried by a vertical pin a", suitably held and rigidly clamped in the forward end of said actuating-lever a The lever (fin the form shown is provided with a long journal-pin a, supported by a lug a of a vibrating plate a, supported on the top of the upright f. The plate a is longitudinally slotted about half its length and at its rear end is provided with a transverse seat into which extends a guiding pin or, screw a, tapped into the frame. The fulcrum of the plate a is provided by a vertical stud a, extending into the slot (0. Stud a is carried by a block a having a screw-threaded aperture in its outer end and through which extends the adjusting-screw a, swiveled in the bracket-arms a". The awl-lever is actuated by a cam-groove (0 in disk A, which operates upon a roller carried by the rear end of the said lever. As shown in Figs. 5 and 6, the cam-groove a is provided with a depression a and a lateral digression (0 the former, aided by spring a causing a vertical oscillation of lever a and the latter causing a lateral vibration of the said lever to effect when the awl is in the work the proper feeding movement. The extent of the feed movement is regulated and controlled by the adjustment of the fulcrum-stud a, as above described.

The operation of the machine is as follows: The needle-thread is led to the looper, as previously stated, and a bobbin or cop of the thread is placed in the bobbin-case and the latter in the holder. The machine is now ready to sew, and presuming that one stitch has been made and set in the work held by the operator against the work-support and a feed movement has taken place the needlethread will lead from the work to the looper. The awl which caused the feed of the work will now be retracted, and likewise the looper. As shown in Fig. 1, the needle-lever will now be lowered by its roller running into the depression a resulting in the upward movement of the needle to pass through the work. As also shown in Fig. 1, the take-up lever is continued elevated by its roller running in thehighest part of the take-up cam-groove, thus supporting the thread substantially taut. The thread-grip is also shown closed, thus preventing supply of thread. Just before the needle reaches its extreme upward position of Fig. 1 the looper will have been advanced to its extreme forward position, re-

sulting in holding the thread stifily in the path of the needle. The lead of the thread will be substantially as shown in Figs. 1 and 7. The oscillating hook will be held in position inoperative. The needle-lever now rises. The needle is retracted and catches the thread in its hook and draws the same in loop form down through the work. At the same time the take-up descends, giving up the thread to form the loop, and the thread-grip is opened, permitting supply. When the needle has drawn the loop to the full extent, the hook will be moved forward from the dotted to the full line position of Fig. 4:, resulting in entering the loop and taking it from the needle, carrying it around and spreading it over the bobbin-case. Substantially at this time the looper will be retracted and the awl in substantially its highest position will have assumed laterally its penetrating plane. The awl will then be depressed by the high part of the cam penetrating the work and holding the same until a stitch is completed and will then be moved laterally to feed the work. Practically at the same time the take-up will rise and the thread-grip will close upon the thread, thus enabling the take-up to fully draw the loop and set the stitch. These operations are repeated successively.

It will be noted by reference to Fig. 7 that when the awl descends to enter the work it moves from one extreme lateral position gradually to the other, reaching the latter just about as it enters the work; but when it ascends its movement from one extreme to the other is-very rapid, and the same is finished before the awl leaves the work. The arrow and line 00 represent the former and the arrow and line 00 represent the latter movement.

Having thus described my invention, what Iclaimas novel is 1. In a shoe-sewing machine, the combination of a needle mechanism and an awl mechanism, the awl mechanism comprising an awl and means for impartinga lateral movement, a succeeding penetrating movement, and a combined feeding and withdrawing movement, the withdrawing movement taking place as the needle moves forward.

' 2. In a shoe-sewing machine, the combination of a needle mechanism and an awl mechanism, the awl mechanism comprising an awl and means for imparting a lateral movement, a downward penetrating movement, and a lateral and upward retractive movement, the retractive movement taking place as the needle moves forward.

3. In a shoe-sewing machine, the combination of a needle mechanism and an a'wl mechanism, the awl mechanism comprising an awl and means for imparting a lateral advancing movement, a following penetrating movement, and a lateral feeding and retractive movement, the retractive movement taking place as the needle moves forward.

4. The combination in a shoe-sewing machine, ofa needle and an awl, a tubular needle-shaft, an awl-carrying shaft journaled in the needle-shaft, the needle-shaft being cut away longitudinally and circumferentially to permit downward and lateral movements of the awl.

5. In a shoe-sewing machine, the combination with an awl, of an actuating-lever, a vibrating plate to control the feed movement of the awl longitudinally slotted at one end and transversely slotted at the other, each slot receiving a guide pin or stud, the pin engaged by the-longitudinal slot being carried by an adjustable block, and operating means for the. actuating-lever, substantially as de-- scribed.

6. In a shoe-sewing machine, an adjustable and regulable awl mechanism, comprising an awlwith a shank having aprojecting post, an actuating-lever having a depending head with a slot in which lies the awl-post, substantially as described.

In testimony whereofI afiix my signature in presence of two witnesses.

EUGENE SMITH. Witnesses: V

BALDWIN SPRINGER, MAURICE P. SATTERTHWAITE.

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