US1683666A - Welt-attaching mechanism - Google Patents

Description

Sept. 11, 1928.

J B HADAWAY WELT ATTACHING MECHANISM Filed May 22, 1922 s Shets Sheet 2 Sept. 11, 1928.

J. B. HADAWAY WELT ATTACHING MECHANISM Filed May 22. 1922 6 Sheets-Sheet 3 Sept. 11, 19221 1,683,666 J. B. HADAWAY WELT ATTACHING MECHANISM Filed May 22. 1922 6 Sheets-Sheet 4 Sept. 11, 1918.

J. a. HADAWAY mam ATTAGHING uncamrsu Filed May 22, 1922 cs-Sheet 5 Sept. 11, 1928.

1,683,666 J. B. HADAWAY WELT ATTACHING MECHANISM Filed May 22. 1922 6 Sheets-Sheet 6 Patented Sept. 11, 1928.

UNITED STATES PATENT OFFICE.

JOHN B. HADAWAY, or swnnrsco'rr, MASSACHUSETTS, ASSIGNOR To witnesses MACHINERY CORPORATION, or rA-rnnson, new JERSEY, n condemns or JERSEY.

wnLT-A'rTAoH-Iner MECHANISM.

Application filed May22, 1922. Serial No. 562,615.

In attaching welts or similar narrow strips to shoes it has been customary to treat as by slashing those portions of the welt which are to be bent around sharply curved por v tions of the shoesuch as the toe in order that the welt may lie'flat or may be more readily brought into the plane of the sole to which it is attached. Inthe case of Welt scwingmachines for securing together the welt upper and insole of welted shoes it has been proposed to utilize various forms and arrangements of welt slashing mechanism for slashing the welt before it reaches the stitch 12 01111 ing devices and thus facilitate the attaching of the welt about the toe or other sharply curved contour and also the subsequent beating out of the welt to bring it into the plane of the insole. These mechanisms are either operated to slit the welt throughout its attached length, which is objectionable, or have depended on the careful attention and skill of'thc operator to throw them into or into and out of operation at the proper point in the welt attaching operation, which also objectionablev I The present invention eliminates the objCCtlOIlitblG features of prior constructions by the provision of means for treating the welt to facilitate its lateral bending, which,

is so constructed and arranged that it is ren dcred active instarting the machine to treat that portion of the welt'only which is laid about a pro-determined contour of the shoe by the attaching mechanism. The welt treating mechanism is preferably arranged at a distance in advance of the attaching point corresponding to the length of welt which will he attachedbcforereaching that part of the shoe with which the treated portion of the welt is to register, sincethis permits the simultaneous starting of welt: treating and attaching operations. .The welt treating mechan sm may, therefore, beso connected with the starting mechanism of themac'hine that it star s its operation at the proper point on the welt without attention or care on the part of the operator'and continues to operate untilithe desired {ire-determined lengthof welt has been operated upon, when its operation ceases. Sinc'ethe length of welt which is attached before reaching that part of the with which the treated portion of the welt should register varies with different lengths of shoesthc welt treating mechanism is preferably so mounted that its distance from the attaching point may be varied in accordance with the length of shoe to be operated on. The length of that port-ion of the welt which should be treated also varies and means is therefore provided for adjusting thewelt treating mechanism to operate during varying periods.

In embodying the invention in an inseam sewing machineto' slash that part of the welt which is laid about the toe of the shoea welt slashing mechanism constructed to make a pre-determined number of slashes and then stop is preferably connected with the starting treadle of the machine to be started when the treadle is operated to start the sewing. The slashing which is thus started without imposing any additional duty upon the operator continues until the slashing mechanism is zuitomatically stopped by a n cchanismwhich may be set to throw the slashing-mechanism out of operation afterany desired number -of cycles of the sewing mechanism. Means is also providedfor rendering the mechanism The preferred form of the invention is shown in the drawings applied to a machine for sewingthe inseam of a welt shoe. In these drawings Fig. 1 is a front view of the ma chine; Fig. 2 is a side view looking toward the left in Fig. 1, a part of the standard being brol fenout; Fig. 3 is a plan view of the welt slashing mechanism F g. 4 1$ a sectional detail view on a horizontal plane passing through the axis of the actuating shaft 'of the slashing mechanism F1g. 5 1s a'sect onal elevation on line 5 of Fig. 3; Fig.- 6 s asinnlar view of a part of the mechanism showingthe parts in a different positlon; Fig. 7 1s a detailed elevation showing the" welt clamping and slashing devices; Fig. 8 is a front elevation of the welt clamping and slashing devices; Fig. 9 is a similar view'showing the parts in a different position; Fig.1!) is a side elevation of the parts shown in Fig. i and Figs. 11 and 12 are views similar to Fig s. 10 and 9 respectively, showing devices for stretching instead of slashing the outer edge of the welt.

In the drawings the invention is shown applied to the welt sewing machine 'for attaching a welt and'upper to the insole of a welt shoe which is shown and described in Patent No..l,.260,527, March 26, 1918. This machine is provided with the usual stitch forming and work feeding devices, including a channel guide 2, an awl 4, a looper 6 and a welt guide 8. The machine is provided w th driving and stopping mechanism which may be the same in construction as that shown and described in Patent No. 1,0995326, June 9, 1914: which is controlled by a treadle 10 as is usual in this type of machine.

The mechanism for treating the welt shown in Figs. 1 to 10 eonsistsiof a welt slashing mechanism which, when rendered active, op

crates on the welt during a pro-determined number of stitch forming and work feeding cycles and then becomes inactive and remains so until again thrown into operation. It is arranged to act on the welt between the welt Y with the size of the shoe to be sewed.

guide 8 and the welt guiding and measuring roll 12 and at a distance from the sewing point substantially equal to the distance from the heel breast or the point where the inseam begins to the toe portion of the shoe. The welt supporting and slashing devices of the mechanism are carried on a slide 14 mounted on a fixed guide 16 for adjustment toward or away f rom the sewing point in accordance The slide may be readily adjusted to position the weltslashing devices at the proper distance from the sewing point by means of an adjusting lever 18, the upper end of which s provided with a segment 20 engaging a rack 22 on the slide andthe other end of which is provided with a spring pressedpin 24: of common construction arranged to engage any one of series of holes in a fixed plate 26.

The welt passes from the guide roll 12 about a guide 28 and thence over a support 30 which is secured to the slide 1i and is provided with edge gagesembraeing the welt. The weltis clamped to the support while heing operated upon by two arms which project forward from a'yoke-shaped clamp lever 32 mounted on a shaft 34 on the slide. The

and releasethewelt through a lever 36 mounted on the shaft 34 and engaging the rear end of a spring pressed plunger 38 mounted in the clamp lever. The lever is held in engagementwith the rear end of the plunger by a spring 40 and the rearward movement of the plungeris limited by the stop nuts 42. The

lever 36 is rocked through toggle links 44 connected with a reciprocating actuating bar 46 by the pivot pin 48;. The spring 40 normally connects the levers 36 and 32 so that they move together; NVhen the toggle is straightened the levers will move together until the c'lampinglever engages the welt, after which the plunger 38 will yield to permit continued a carrier lever 56 at an inclination to the welt.

The carrier lever is pivoted on a bracket 58 which is adj ustably secured by a set screw (50 to the forwardly projecting arm of a lever 62 which is mounted on the shaft 34. The upper end of the knife carrier lever is normally held in engagement with a stop (it on the brackot 58 by a spring 66. The lever (32 is rocked from the actuating bar46 through a roll 68carried by the bar and engaging a cam slot 70 in the rear end of the lever. The cam slot is so shaped that the knife is held in its upper position during the forward movement of the bar which brings the clamp lever into engagement with the welt, after-which the continued movement of the bar rocks the lever to bring the knife into engagement with and force it into the welt. During the first part of the movement of the lever (12 the knife carrier lever 56 remains in engagement with engagement with the cam by a spring 78.

The shaft is driven through a gear loosely mounted on the shaft and continuously rotated during the sewing from the cam shaft 82 of the sewing machine through gearing 84. When the starting treadle is operated by the operator to start the sewing machine the driving gear 80 is temporarily connected with the shaft 7 2 through a clutch sleeve 86 keyed to slide on the shaft and provided with a clutch lug 88 adapted to engage a similar lug 90 on the hub of the gear. The clutch is normally held out of engagement with the gear a ainst the pressure of a spring 92 by a stop bolt 94:, the inner end of which is arranged to engage a stop cam 96 on the clutch. The stop bolt is normally held with its inner end in engagement with the cam 96 as indicated in Figs. 3 and 5 by a spring 98. The stop'bolt is withdrawn to permit the clutch to engage the driving gear and thus throw the slashing mechanism into operation through a lever 100, the upper end of which engagesa collar 102 on the bolt. The lever is connected with a tripping lever 104 by a latch 106 which-is pivoted on the lever 104 Inn anism. Then the treadle is depressed the tripping lever is rocked into the position in dicated in Fig. 6, thus withdrawing the locle ing bolt to start the slashing mechanism. The final downward movement imparted to the trip lever from the treadle brings the tail of the lat-ca 106 into engagement with the stop screw 11 1 and disengages the latchfrom the lever 100 so that the lever is immediately returned to initial positionby the spring 116 where it does not interfere with r the return of the stop bolt to stopping-position. The immediate return of the stop bolt is prevented at this time, however, by a timing latch 118, which rides on the collar 102 as indicated in 5 and drops down back of the collar as indicated in Fig. 6 when thestop bolt is withdrawn. The timing latch holds the stop bolt in retracted position until the cam shaft of the sewing machine and the shaft 7 2 have made a number of revolutions determined by a timing mechanism which disengages the timing latch and permit-s the stop bolt to return to stopping position. V

The timing mechanism comprises a sleeve 120 loosely mounted on the shaft 72 and held in initial position by a coil spring 122, one end of which is connected with the sleeve,- and the otherend of which is connected to a fixed clamp 12 1 igs. 4 and 6). The sleeve provided with a ratchet wheel 126 through which it is intermittently advanced, and its initial position is determined by a lug 128 projecting from the ratchet wheel, and a lag 130 projecting from the side of an adjustable gear 132 mounted on the shaft 7 2 at the end of the sleeve. The pawl 13% for engaging the ratchet wheel 126 and intermittently advancing the timing sleeve is pivoted to the upper end of a pawl carrying arm 136, the lower end of which is providedwith a hub 138 pivotally supported upon the fixed plate 140. The hub carries a second upwardly projecting arm142, the upper end of which carries a roll 144 engaging a cam 146 which is keyed to the shaft 72. The roll is held in engagement with the cambya spring 148, acting on an arm 150 which projects from the hub138. The pawl 134 is normally held out of engagement with the ratchet wheel by a pin 15 2 projecting laterally from an arm 154i projecting fromthe sleeve 156 which forms the hub of the timing stop 118. The arm 15 1 also carries aspring ressed stop pawl 158 which is normally he clout of engagement with the teeth of the ratchet wheel 126 as indicated in Fig. ,5. The timing sleeve is provided with a cam 1:60 arranged to engage a roll 162 on the arm 15% and :to raise this-arm and the timing latch 118 into the position 1-, dicated in Fig. V

lVhen the stop bolt is withdrawnin start ingthe machine to start the slashing mechani-sm the timing latch 118'a id the connected arm 15st are'swung down into the position indicated in Fig.6 by the spring 116%. This brings the timing latch into position to pre vent the return of the stop'bolt' and also the roll 162 and lifts the arm 154l and tim-- ing latch back to initial position. lVhen this w occurs the stop bolt will return to stopping position and will bring the collar 162 under s the timing latch where it will support the latch and arm 15 1 1n their raised positions.

The lifting of the arm 154E disengages the ac-,

tuating pawl and stop pawl-from the ratchet wheel so that the ratchet wheel and timing sleeve are returned to initial position by the coil spring 122. The number of cycles during which thesla'shing mechanism continues in action will depend upon the initial of the lugs 130 and 128.

To enable the lug 136 to be readily adjusted to vary the number of cycles during which positions the slashing mechanism continues in action the gear 132 on which the lug 130 is formed is engaged by a segment 166 secured tothe i inner end of a shaft 168, the outer end of which is connected by beveled gears 170 with the rear end ofa shaft 172. The forward end of the shaft carries an adjusting lever 174 which'may be adjusted to bring a pin 176 carried therebyinto engagementwith any one of a series of holes in an index plate 17 8 and thus vary the position of the lug 130 so that the slashing mechanism will continue in action during the number of cycles indicated by the adjustment of the lever.

In order that the operator mayrender the devices for throwing the slashing mechanism into operation inactive in case hewishes I tooperate the starting treadle without throwing the slashing mechanism into operation means is provided underthe control of the operator for disconnecting the trip lever from the starting treadle.- As shown this 7 of a spring 184 so that its upper hooked end will be disengaged from the trip lever. 10 1. When the lever is in the position indicated in .Fig. 1 thetrip lever is connected with'the treadle so that the slashing mechanism will be thrown into operation in starting the machine. If the operator throws the lever down into a Vertical position the cam projection 182 will move the upper end of the rod 110 out of engagement with the trip lever so that the treadle may be operated to start the machine without effecting the slashing mechanism. The slashing mechanism may be rc-connected by merely throwing the lever into horizontal'position.

In the constructionshown in Figs. 11 and 12 welt stretching devices have been substituted for the welt slashing devices of 8, 9 and 10. The welt stretching devices comprise a transversely slotted welt support 186 upon which the welt is clamped by the arms of the clamp lever and a welt pressing head 188 secured to the forwardly projecting arm of the lever 62 and arranged to deflect and stretch the outer edge of the welt between the spaced sections of the support. The welt engaging face of the block is inclined transversely to the welt so that the stretching of the welt is the greatest at its outer edge and gradually diminishes toward its inner edge. This repeated stretching of the welt along that portion which is to be laid about the toe of the shoe facilitates its lateral bending and attachment when this point in the seam is reached.

lVhile it is preferred to employ the specific construction and arrangement of parts shown and described in applying the invention to an inseam sewing machine of the type shown in the patent referred to it will be understood that this construction and arrangement is not essential to the broader features of the invention and may be varied or modified as found desirable orbest suited to the construction and mode of operation of the machine to which it is'to be applied.

What isclaimed is: 1 I 1. A machine .i'or attaching welts having, in coii'ibination, welt attaching mechanism, welt treating mechanism acting when thrown into operation to operate on the welt for a limited period during the operation of the Walt attaching mechanism and then automatically stop,'said welt treatingmechanism being arranged to acton the welt at a distance from the attaching mechanism corresponding to the length of 'welt which will be attached before reaching a sharply curved marginal portion of the shoe. and means act ing to render the welt treating mechanism active in starting the machine to treat the portion, of the welt to be attached to said sharply curved marginal portion of the shoe.

2. A machine for attaching welts having, in combination, welt attaching mechanism, welt treating mechanism arranged to act on the. welt at a distance'from the attaching mechanismcorresponding to the length of welt which will be attached before reaching a sharply curved marginal portion of the shoe, means acting to render the welt treating mechanism active in starting the machine to treat the portion of the welt to be attached to said sharply curved marginal portion of the shoe, and mechanism acting during the operation of the attaching mechanism to render the welt treating mechanism inactive on the welt after a fixed period of operation thereon.

3. A machine for attaching welts having, in combination, welt attaching mechanism, welt treating mechanism arranged to act on the welt at a distance from the attaching mechanism corresponding to the length of welt which will be attached before reaching a sharply curved marginal portion of the shoe, means acting to render the welt treating mechanism active in starting the machine to treat the portion of the welt to be attached to said sharply curved marginal portion of the shoe, and mechanism acting to render the welt treating mechanism inactive on the welt after a predetermined period of operation thereon adjustable to vary the period.

4:. A machine for attaching welts having, in con'ibination, welt attaching mechanism, welt treating mechanism acting when thrown into operation to operate on the welt for a limited period during the operation of the welt attaching mechanism and then automatically stop, said welt treating mechanism being arranged to act on the welt at a distance from the attaching mechanism corresponding to the length of welt which will be attached before reaching a sharply curved marginal portion of the shoe. and mechanism thrown into operation by the operator in starting the machine and acting automatically to start the operation of the welt treating mechanism on the welt to treat the portion of the welt to be attached to said sharply curved marginal portion of the shoe.

5. A machine for attaching welts having, in combination, welt attaching mechanism and welt treating mechanism adjustable toward and from the attaching point to act on the welt at a distance therefrom corresponding to the length of the welt which will be attached before reaching a sharply curved marginal portion of the shoe, and timing devices for throwing said welt treating mechanism out of operation at the completion of a predetermined period of operation thereon.

6. A machine for attaching welts having, in combination, welt attaching mechanism, welt treating mechanism arranged to act on the welt at a distance in advance of the attaching point corresponding to the length of welt which will be attached before reaching a predetermined part of the, work with which the-treated portion of the welt is to register, and mechanism thrown into operationhby the operator in starting the machine and acting automatically to start the operation of the welt treating mechanism on the welt.

7. A machine for attaching welts toshoes llli having, in combination, welt attaching mechanism, mechanism for treating the portion of the welt that is to be laid about thetoe of the shoe while the forward end of the welt is being attached, timing device for throwing said mechanism out of operation at the completion of a predetermined period of operation thereof, and connections between said welt treating mechanism and the starting mechanism of the machine to throw said welt treating mechanism into operation.

8. A welt sewing machine having, in combination, stitch forming mechanism, mechanism for treating the portion of the welt that is to be laid about the toe of the shoe while the forward end of the welt is being attached, timing devices for throwing said mechanism out of operation at the completion of a pre determined period of operation thereof, and means for controlling thethrowing into operation of the welt treating mechanism from the starting mechanism of the machine.

9. A machine for attaching welts to shoes having, in combination, welt attaching mech anism, welt treating mechanism for operating on the portion of the welt that is to be laid about the toe of the shoe while the forward end of the welt is being attached, having provision for adjustment to vary the distance from the end of the welt to the treated portion in accordance with the length of the shoe operated upon, and means for controlling the throwing into operation of said welt treating mechanism from the starting mechanism of the machine.

10. A welt sewing machine having, in combination, stitch forming mechanism, welt slashing mechanism acting when thrown into operation to slash afixed length of welt and then automatically stop, and means for controlling the throwing into operation of the slashing mechanism from the starting mechanism of the machine. 7

11. A welt sewing machine having, in combination, stitch forming mechanism, welt slashing mechanism arranged and actuated to slash only the portion of the welt which is to be laid aboutthe toe of the shoe,and means for throwing the slashing mechanism into operation in starting the machine to cause said mechanism to slash the portion of the welt which is to be laid about the toe of the shoe.

12. A welt sewing machine having, in comthe slashing mechanism out of operatiomand means for throwing into operation the slashing mechanism from the starting mechanism of the machine. Y

13. A welt sewing machine having, in

welt guide at the sewing point, welt slashing mechanism arranged at a distance from the sewing point substantially equal to the length of weltfrom the initial end of the seam to the toe of the shoe and adjustable toward and from the sewing point to vary said distance in accordance with said length.

14:. A weltv sewing machine having, in combination, stitch forming mechanism, a welt guide at the sewing point, welt slashing mechanism arranged at a distance from the combination, stitch forming mechanism, a

sewing point substantially equal to the length of welt from the initial end of the seam to the toe of the shoe, and adjustable toward welt treating mechanism acting when thrown into operation to operate on the welt for a limited period during thewelt attachingoperation and then automatically stop, and means which may be rendered inoperative at the willof the operator for throwing the welt treating mechanism into operation from the starting mechanism of the machine.

16. A machinefor acting on welts having, in combination, a welt support, a knife carrying lever, a knife mounted, onthe lever at an inclination to the welt, and means for moving the pivot of the lever toward and away from thewelt.

17. A machine for acting on welts having, in combination, awelt support, a knife carrying lever having its pivot arranged transversely of the welt, a knife mounted on the lever at an inclination to the welt, means for yieldingly retaining the lever in normal position on its pivot, and means for moving the pivot toward: and away from the welt.

18. A machine for acting" on welts having, in combination, a welt support,a welt treating tool, a welt clamp, an actuator, yielding connections between the actuator and clamp for forcing the clamp against the welt, and connections between the tool and actuator for thereafter actuating the tool. I V

I JOHN B. HADAWVAY.

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