US2868148A - Welt shoe sewing machines - Google Patents

Description

1959 o. F. HOPPE ETI'AL 2, 8, WELT SHOE SEWING MACHINES 4 Sheets-Sheet 1 Filed July 2, 1954 In ven tors F 06250 fi'azzz Jan. 13', 1959 F, HOPPE ET A 2,868,148

WELT SHOE SEWING MACHINES Filed July 2 1954 4 Sheets-Sheet 3 In ven tors 1959 o. F. HOPPE ETAL 2,86

. WELT SHOE SEWING MACHINES Filed July 2, 1954 4 Sheets-Sheet 4 zit:

- '4 IIIIIII {III/IIIA 1 III/II In ventorg United States Patent 2,368,148 Patented Jan. 13, 1 959 2,868,148 WELTSHOE SEWING MACHINES Otto Franz Hoppe, Schonberg, and Heinrich Richard v Ruhr, Frankfurt am Main, Germany, assiguors, by

mesne assignments, to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application July 2, 1954, Serial N 0. 441,144

Claims priority, application Germany July 10, 1953 13 Claims. (Cl. 1'12-46) The present invention relates to welt wetting and tempering devices intended for use with shoe sewing machines, and more particularly to improvements in welt shoe sewing machines equipped with welt tempering devices which are readily adjustable and adaptable for use under different conditions with varying styles and sizes of welts. t

In United States Letters Patent No. 1,972,970, granted September 11, 1934, upon application of Fred Ashworth, a welt tempering device is disclosed similar to that embodying the present invention. That device is provided with a series of interchangeable welt enclosing guides for immersing a welt Within a moistening liquid contained in a suitable receptacle. In use the patented device has been found to set up frictional resistance within the guides as they engage the welt to immerse it within the moisten ing liquid. Occasionally excessive resistance is imparted to the welt as it is drawn towards the point of operation of the machine. To o-vercomethis difliculty it has been found desirable to employ a feeding device for pulling the welt through the moistening device in order to deliver it to the sewing machine as free as possible from tension. For this purpose a welt feeding device hasbeen employed similar to that disclosed in United States Letters Patent No. 2,321,610, granted June 15, 1943, upon application of A. R. Morrill. In this feeding device the welt is wrapped loosely about a continually rotating roll and is pressed intermittently into frictional engagement therewith whenever the machine exerts a light tension on the welt. Intermittent exertion of even a light tension on the welt, however, is detrimental to smooth operation of a welt sewing machine and for this reason use of both the welt tempering and the feeding device has not become widespread in spite of the desirability of properly tempering a welt before sewing. 1

v The basic purposes of the present invention are to overcome the difficulties encountered in the use of prior welt tempering devices for shoe sewing machines, to provide such devices 'withsuitably arranged guides for directing welt through a m'oistening liquid in a manner which will avoid impressing frictional resistance on the welt in large degree and to provide a feeding device which insures delivery of welt to a sewing machine uniformly free of tension while at the same time preserving features of adaptability, quick threading of the welt through the machine, uniformity of tempering operations and durability not found in the prior machines. Another purpose is to pro vide an improved welt feeding device for a shoe sewing machine which'will enable tension free welt to be delivered to the machine under all circumstances, thus improving the welt sewing operation. A further object is ning through moisteningliquid contained in the receptacle of the tempering device embodying the present invention, a simplified and improved friction eliminating immersion guide is provided which not only reduces the drag imparted to the welt running through the device but which is arranged also to facilitate quick threading of the welt, as well as to enable easy adjustment to different forms of welt, such as beaded storm welt and flat welt of various sizes and dimensions. To these ends the sewing machine in which the present invention is embodied includes the usual stitch forming and shoe feeding devices and their actuating mechanisms, a sewing welt guide for directing a welt into the point of operation of said devices and a receptacle for a welt moistening liquid on which is mounted a Welt immersing means comprising a roll rotating onan axis inclined to the surface of the liquid in the receptacle, the roll pressing the welt beneath the level of the liquid, an edge guide flange extending into theliquid in-the receptacle and acting to direct one edge of the welt through the liquid, a stud for the roll on the flange and a resilient edge gage engaging the edge of the welt to press it against the edge. guide flange.

For the most beneficial welt tempering results the edge guide flange is formed on a bracket along which the lower edge of the welt is directed and a stud on which the imrnersion roll is rotatably mounted extends upwardly at right angles from the guide flange at the preferred angular inclination to the level of the liquid. In order to insure convenient access to .the immersion roll for the purpose either of applying the welt or replacing the roll it is mounted for ready removal from the stud.

The frictional resistance imparted to the welt is kept uniformly low through the use of welt guide rolls properly located to keep the welt in its horizontal path until 'it reaches the sewing welt guide and is reduced fro-m the amount met with in prior constructions to such an extent that it is possible toemploy a simple form of welt feed dog connected to adjustable mechanism for actuating the feeding devices of the sewing machine. The feed dog delivers the welt at all times from the moistening liquid in a tension free condition to the sewing machine, the connection with the feeding mechanism of the sewing machine being such that the welt is drawn through the moistening liquid at a rate of speed slightly greater than the feeding movement imparted to a shoe by the feeding devices without causing excessive overfeed regardless of adjustments of the feed length. While this feature of the invention is particularly beneficial when employed with a welt tempering device for a sewing machine, it is also useful when a welt is being sewn which does not require mo-istening or when an operation is being performed in which no welt tempering device is utilized.

These and other features of the invention, as hereinafter described and claimed will readily be apparent to those skilled inthe art from the following detailed specifiaction taken in connection with the accompanying drawings, in which:

Fig. 1 is a perspective view-looking from the right front of a shoe inseam sewing machine embodying the features of the present invention;

Fig. 2 is a detail sectional plan view on an enlarged scale of a feed slide and its actuating lever in the machine of Fig. 1;

Fig. 3 is a detail view in right side elevation of the feed slide and actuating lever;

Fig. 4 is a plan view on a further enlarged scale of the welt tempering device of the machine illustrated in Fig. 1;

Fig. 5 is a vertical sectional view taken along the line VV of Fig. 4;

Fig. 6 is a detail view of a substitute welt guide roll employed in the welt tempering device;

' VIlL-VIII of Fig. 4;

Fig. 9 is a detail sectional view of a welt feed dog and its mounting taken along the line IX-IX of Fig. 7; and

Fig. 10 is a similar view showing the welt feed dog disengaged from the welt.

The machine of the present invention is a welt shoe sewing machine similar to that disclosed in United States Letters Patent No. 1,108,560, granted August 25, 1914, upon application of Andrew Eppler and No. 1,971,575, granted August 28, 1934, upon application of Alfred R. Morrill. The machine frame has a sewing guide 2 to direct the welt into the point of operation or" the stitch forming and feeding devices, including a curved hook needle 4 and a curved work feeding awl 5. For actuating the stitch forming and feeding devices the machine is provided with mechanisms corresponding to those of the patent, some of which mechanisms will be described more fully below. For retaining a supply of welt moistening liquid the present machine has mounted on it a cast iron receptacle 6 in which the liquid is maintained at a constant height by a float valve control bottle 8 supported within a receiver 10, the bottle having a float valve cap 12 (Fig. resting on a lug 14 projecting upwardy from the bottom surface of the receiver which communicates with the receptacle 6.

In order to mount the receptacle and receiver on the machine its head frame, indicated at 16, has passing through it a vertical bolt 18 extending upwardly into threaded engagement with a bearing stanchion 20. The bolt 18 passes loosely through one end of an arm 22 rigidly clamped to the underside of the frame by the head of the bolt, and the other end of the arm has an opening through which the threaded lower end of a clamp screw 24 passes. Above the arm 22 the clamp screw is secured to a laterally projecting lug on the receptacle 6.

In the welt tempering device of the Ashworth patent above referred to the welt is carried through moistening liquid in a receptacle with the plane of the welt inclined at an angle to the surface of the liquid to ensure entry of the liquid into the groove of the welt with a minimum extent of immersion. The welt is led through a series of guides in the form of slotted plates which cause the welt to travel in as straight a path as is possible from a source of supply. In order to bring the welt into line with the point of sewing operations from the prior tempering device it is necessary to lead the welt through rightangle bends, which are likely to impart excessive frictional resistance to the welt as it approaches the sewing machine. After passing through the guides the welt is drawn into the sewing point of the machine solely by the feeding action of the machine. As the welt is drawn through the slots of the guides a certain amount of friction is imparted to it which increases the burden imposed on the stitch forming and feeding devices, and, in some instances, due to irregularities in the dimensions of the welt, the resistance offered along the right-angle bends become excessive, so that improper operation results. To overcome these difficulties and to enable the welt to be delivered in a tension free condition to the stitch forming device in the present machine the slotted plate which frictionally engages the welt is replaced by a friction reducing guide constructed in the form of a freely rotating roll for directing the welt toward and from the moistening liquid and other guides which maintain the welt in a' substantially horizontal path, the immersed section of which welt comprises a twist about a lengthwise axis to rolls 28, 30 and 32 having axes inclined at an angle to the level'of the liquid in the receptacle 6. The roll 26 has flanges at both of its ends (see Fig. 4) and is rotatable on a horizontal screw 33 threaded into the receiver 10. The rolls 28 and 32 have flanges at their forward upper ends only. The axes of the rolls 28 and 32 comprise a pair of similar screws 34 threaded into a welt guide plate formed by an inclined flange 36 fixed on a bracket 38. From the roll 32 the welt is delivered directly into the sewing point of the machine with substantially no deviation from the horizontal welt path, the path extending forwardly and downwardly only slightly, as indicated in Fig. 1.

The rolls 28 and 32 form a welt twisting immersing and moistening guide together with the main immersing roll 38 which rotates on an axis inclined at an angle to the horizontal surface of the liquid in the receptacle 6 and parallel to the axes of the rolls 28 and 32. The lower edge of the welt is pressed against the underside of the welt immersing roll 30 and beneath the level of the liquid and passes over the upper surfaces of rolls 28 and32 while the upper edge of the welt is kept free of the liquid. To maintain the welt under proper control, the flanges on the rolls and the inclination of the roll axes with relation to each other prevents displacement of the welt in any direction across their surfaces.

For convenience in mounting the immersing roll 30 and in applying the welt thereto, this roll is rotatably mounted for ready removal on a stud 40 (see Fig. 5) extending upwardly at right angles from the higher side of the fixed flange 36 of the bracket 38. The bracket is slidably mounted on the upper end of a vertical rod 41 which is clamped by a set screw 42 (Fig. 5) threaded in a passage extending through a rear enlargement of the receptacle containing the moistening liquid. The arrangement is such that the bracket with the guide rolls 28 and 32 and the immersing roll 30 between them are movable as a unit vertically toward and from the moistening liquid in the receptacle.

To prevent the roll mounting bracket 38 from swinging about the vertical rod 41, the bracket has formed in its right end a slot provided with'opposed bearing surfaces engaging a square bar 43 (see Fig. 4) extending upwardly from the rear of the receptacle 6 in parallel relation to the vertical rod 41. During operation of the machine the bracket 38 holds the roll-30 in a position with the lowermost portion of its peripheral edge dipping below the level, indicated in Fig. 5 at 44, of the moistening liquid within the receptacle. The bracket is adjusted with relation to the level 44 of the moistening liquid to a position such that a welt, indicated at 46, having the usual groove 47 is immersed at least to the depth of the groove along one side of the welt and slightly below the corner of the welt at the side opposite the groove. To guide the welt accurately the guide flange 36 extends into the liquid in the receptacle at an angle to its level 44, and as the immersing roll 30 rotates the welt is flexed downwardly about it and pressed to the proper depth beneath the liquid level.

To insure that the lower edge of the welt is directed by and maintained uniformly in contact with the edge guide flange 36, the bracket 38 supports a resilient edge gage 48, formed at its lower end with several step-shaped sections concentric with the curvature of the roll 30 and with a curved extremity on a counterbearing arm 54) mounted for quick displacement on the bracket 38 above the roll 30 in a position to receive and support within a recess formed in the arm the upper forward end of the stud 40. The arm 50 has extending forwardly from it in concentric relation to the recess for the stud 40 an integral shaft 52 on which the edge gage 48 is rotatably and slidably mounted, the edge gage having a sleeve portion surrounding the shaft 52. The edge gage is pressed yieldingly-downwardly and, in turn, presses the lower edge of the welt yieldingly against the guide flange 36 through in Fig. 5.

the action :o'f'a relatively light compression spring '54 coiled about the'shaft 52'be'tw'een'th'e head of a screw '56 threaded into the shaft and the lower edge of a counterbore in the sleeve portion of the edge gage.

For ipreventi ng rotation of the edge gage.- and for con venience -in threading the welt beneath the moistening roll 30, the edge gage' tfi hassecured to its sleeve portion by a screw 58 a spring supported'key 60 passing through a slot .in the sleeve portion of the'edge gage and into a recess formed in -the shaft 52. Uponsliding the edge gage upwardlyalong "theshaft 52, the shaft 52 displaced the key60 from the recess. As soon as the key is displaced from the recess in the' shaft the edge gage may be 1 rotated until one of its'step portions slides over the alin'ement with the recess in the shaft 52.

The welt immersing guide mu 30 has a fiat outer periphery for engaging a flat welt-46 similar to that shown When a'be'aded' storm welt is to be operated upon the'roll 30 is removed from the shaft 40 and a roll 62 ('Fig. 6) "having agroove 63 is substituted. The bead of the welt then fits into the 'grooveand is guided thereby.

To enable ready removal of the immersing roll and easy substitution of one welt' guideroll for another the counterbearing arm Fil which supports the upper end of the stud 40 is provided with quickly releasable clamping means. For. this purpose the arm has passing through its upper enda thumb screw 64 threaded at its lower end in the bracket 38 with its axis running parallel to the axis of the studetl. When the arm 50 is engaged with the stud 40, tightening the thumb screw secures the'parts in fixed relationship. Uponfloosening the thumb screw the arm may be lifted and rotated on the thumb screw to swing it clear ofthe roll 30 for rernoval of the roll. To assist in holding the armclear of the immersing roll the bracket beneath the arm is counterbored to receive a coil spring66 which. bears-at its upper end against the under surface of the counterbearing arm.

To adjust the extent of w elt immersion the bracket 38 which is slidingly mounted on the vertical rod -41 at its upper end is formed with a bore within which is mounted a coil spring 68 compressed between the lower end of the bore in the rod and the upper end of a passage in the bracket which surrounds the rod.

The rearwardportion ofthe bracket 38 also has a slot 70 through which a screw 72 passes (see Figs. 4 and 8). Engaging the upper end of the screw is a thumb nut 73 acting to limit the upward movement of the bracket under the pressure of the spring 68. By rotating the thumb nut the extent of welt immersion may be increased or decreased. The lower end of the screw 72 is split and has rotatably mounted on a pin 74 passing diametrically through it, the upper end of a link 76. The lower end of the link is pivotally mounted on a pin '78 secured in a cylindrical block 80 rotatably mounted on a threaded pivot 'screw'82 fixed to the lower end of the rod 41. Rotation of the block 80 on the pivot screw 82 causes the bracket 38 to bez-lowered a fixed amount or raised by the spring 68 to bring the welt engaging the roll 30 above the level'44 of the liquid in the'receptacle 6. For rotat-' ing the block 80, it is provided with a handle 84 (Figs. 1

and projecting forwardly in a convenient position for manipulation the operator. To limit rotation of the block 80 on its pivot screw it carries a pin 85 arranged toengage the rearward side of the rod 41, the force of the spring 68 and the friction of the parts serving to maintain the bracket 4} in position at either limit of its vertical movement. When in raised position the immersing guide roll isaccessible for cleaning purposes and the welt may readily be threaded beneath it. Also it is desirable .to retain the'welt above the level of the moistening liquid at all "times when the machine is not operating, the handle 84 being actuated to bring the welt into an immersed position just before starting a welt sewing operation.

By reason of the reduced friction on the welt as it passes over 'the'guide rolls it is possible to employ a simple form of welt feed dog mounted for reciprocation along a path parallel toxthe welt substantially throughout its length between the receptacle and the stitch forming'devicesfor pullin'gwelt through the moistening liquid and for delivering it in a condition free of tension to the stitch forming devices without causing indentation or other injury to the welt by reason of the action of the feed dog. The 'feed dog is illustrated at 86 in Figs. 7, 9, and 10. 'In Fig. 7 it is shown with a serrated edge along its free end engaging the welt 46 to press it yieldingly against the guide surface of a U-shaped plate 88. The plate 88 has at one end a perforated ear through which passes a dog operating shaft 90. The shaft 90 also has secured to it'a flanged block 92, a pin94 passing through it and the shaft. The plate 88 is in the form of a removable spring clip having a'reverse'ly bent part engaging an angular recess '96 in the block 92. With the use of a flat'welt it is pressed by the feed dog against the plate 88 (Fig/9). When a beaded storm welt 93 '(Fig.

10.) is being operated upon, the clip is removable by disengaging its reversely bent portion from the recess '96, and slipping the perforated ear from the end of the shaft 9%. When the plate is removed from the block '92, a groove 98 in the block is exposed so that the bead of the welt may {enter therein and provide a firm support for the welt '(see Fig. 1 0).

The feed dog 86 is :pivo'tally 'mounted'by means of a pair of alined screws 100 threaded into the flanges of the block 92. The feed dog is slotted through its central portion as 'best'shown in Fig. 7 and within its slot there "is disposed one end of a tension spring 102 engaging a pin 11M passing across the slot in the dog.- The spring 102 also is engaged with a pin 166 passing between the flanges of the 'block '92 in such aposition that the spring extends from the pin 104 at one side of the screws 1%,

acting to draw the feed dog'yieldingly into engagement with the welt. "When the dog is swung about its pivot screws, the spring 102 moves across the axis of the screws with a snap action to'hold the dog away frorn the welt engaging surface of the plate 88 or from the underlying block 9221s the case'may be, while a new welt is being threaded through the machine. 1 For convenience in swinging the dog toward ;and from the welt it has projecting from it a stud 107. To limit the movement of the dog away from the welt the dog has a shoulder which engages a pin M8 carried by the block 92 (Fi 19).

During operation of the machin'ethe feed dog 86 and its mounting block 92-a're actuated with a stroke slightly greater thanthat imparted by the feeding devices to the shoe being operated 'upon to cause tension free welt to p any excess not consumed in the sewing operations.

For actuating the welt 'feed dog and its mounting block. the shaft 90 is reciprocated in a bearing formed by a perforated headon a vertical support 109. The support iii- 3 is secured in a split clamp formed at one end of a bar illltl through'which passes a clamp screw 112. The support 109 also has secured to its upper end a collar 114 to prevent removal of theisupport when the clamp screw 112 is loosened. The bar '110 is secured to the stanchion 20 of the machine'frame by a nut 116 engaging a' threadleft end is a sheet metal brace 120 (see also Fig. 4) bent into angular form, the angular portion of which lies parallel with the welt as it is delivered from the feed dog.

Pivotally connected with the feed dog actuating shaft 90 at its left end is a downwardly extending boss of a feed adjusting slide 122 (see Figs. 1, 2, 3 and 4). The feed adjusting slide 122 is clamped within a slot 124 of a horizontal cam actuated feed lever 126 fulcrumed at its forward end on a vertical pin 128 secured to the frame of the machine. For actuating the work feeding awl through its feeding movements the awl is mounted for oscillation on a feed carrier 130 having a lower slotted portion arranged in parallel relation to the feed lever 126. Within the slotted portion of the feed carrier 130 projects a block 132 pivotally mounted on a stud'134 passing through the feed adjusting slide 122. For securing the feed adjusting slide to the feed lever the lower end of the stud 134 is threaded to receive a clamp nut 136 acting to clamp the adjusting slide to the lever. As will be apparent from Figs. 2 and 3 of the drawings the point of pivotal connection of the dog actuating shaft 90 to the feed adjustingslide 122 is further away from the fulcrum shaft 128 than the stud 134 which actuates the feed carrier. Thus, the rate of movement imparted to the feed dog 36 will always be greater than the rate of movement imparted to the shoe feeding awl 5 with the same excess of feeding movement of the feed dog toward the point of operation of the stitch-forming devices so that tension-free welt will be delivered at all times to the machine.

The nature and scope of the invention having been indicated and a particular embodiment having been described, what is claimed is:

1. A welt tempering device for use with a shoe sewing machine, having a main frame, and a receptacle on the main frame for moistening liquid into which the welt is dipped by twisting about a lengthwise axis of the welt, in combination with a welt immersing guide mounted above the receptacle and provided with a roll for pressing the welt beneaththe level of the liquid in the receptacle, a fixed edge guide flange extending into the liquid in the receptacle at an angle to the liquid surface and acting to direct one edge of the welt, a stud on which the roll is rotatably mounted extending upwardly from the higher side of and at right angles to the flange, and

two guide rolls on the flange rotating on axes parallel to 7 that of the immersing roll, between which guide rolls the immersing roll stud is mounted.

2. A welt tampering device for use with a shoe sewing machine, having a main frame, and a receptacle on the main frame for moistening liquid into which the welt is dipped by twisting about a lengthwise axis of the Welt, in combination with a Welt immersing guide mounted above the receptacle and provided with a roll for pressing the welt beneath the level of the liquid in the receptacle, an edge guide flange extending into the liquid in the receptacle at an angle to the liquid surface and acting to direct one edge of the welt through the liquid, a stud on which the roll is rotatably mounted extending upwardly from the higher side of the flange, and a resilient edge gage engaging the other edge of the welt to press it against the guide flange. v

3. A welt tempering device for use with a shoe sewing machine,.having a main frame, and a receptacle for moistening liquid on the main frame, in combination with a welt immersing guide mounted above the receptacle and provided with a roll'for pressing the welt beneath the level of the liquidin the receptacle, said roll rotating on an axisinclined to the level, ofthe liquid to direct thewelt with a twisting action about the axis of the welt, an inclined edge guide flange extending into the liquid in the receptacle and acting to direct one edge of the Welt through the liquid, a stud on which the roll is rotatably mounted extending upwardly from the higher side of the flange, means for supporting the upper end of the stud arranged for quick displacement to enable ready removal of the immersing roll from the stud, a resilient edge gage rotatably and slidably mounted engaging the other edge of the Welt to press the welt yieldingly against the guide flange and means for preventing rotation of the edge gage on its mounting.

4. A welt tempering device for use with a shoe sewing machine, having a main frame, and a receptacle for moistening fluid onthe frame, in combination with a welt immersing guide comprising a bracket provided with an edge guide flange extending into the receptacle, a stud projecting upwardly at an inclination to the level of the liquid in the receptacle from the flange, a roll rotatably mounted on the stud to direct the welt from the guide into the machine with a twisting action about a lengthwise axis of the welt, a bearing arm carried by the bracket and engaged with the upper end of the stud, and quickly releasable clamping means having a thumb nut for securing the bearing arm to the bracket.

5. A welt tempering device for use with a shoe sewing machine, having a main frame, and a receptacle for moistening fluid on the frame, in combination with a welt immersing guide comprising a bracket provided with an edge guide flange extending into the receptacle, a stud projecting upwardly at an inclination to the level of the liquid in the receptacle from the flange, a roll rotatably mounted on the stud to direct the Welt from the guide into the machine with a twisting action about a lengthwise axis of the welt, a, bearing arm carried by the bracket and engaged with the upper end of the stud, quickly releasable clamping means having a thumb nut for securing the bearing armto the bracket, said bearing arm having an integral shaft and an edge gage rotatably and slidably mounted on the shaft to press the welt against the guide flange.

6. A welt shoe sewing machine having a main frame, stitch forming and shoe feeding devices in the frame, mechanisms for actuating said devices, a guide for directing a welt into the point of operation of the stitch forming devices, a receptacle for moistening liquid on the frame and a welt immersing guide mounted above the receptacle and provided with means for pressing the welt beneath the level of the liquid in the receptacle including a freely rotatable roll, in combination with a yieldingly actuated welt feed dog mounted for reciprocation along a path parallel to the movement of the welt between the receptacle and the stitch forming devices and arranged to draw welt from the'receptacle while moving in one direction and to apply a frictional action to the welt in the other direction, and a connection between the mechanism for actuating the shoe feeding devices and the feed dog to pull welt beneath the roll through the moistening liquid within the receptacle and to deliver it to the stitch forming devices free of tension.

7. A Welt shoe sewing machine having a main frame, stitch forming and shoe feeding devices in the frame, mechanisms for actuating said devices, the feeding device mechanism being adjustable to change the length of feed, a guide for directing a welt into the point of operation of the stitch forming devices, a receptacle for moistening liquid on the frame and a welt immersing guide mounted above the receptacle and provided with means for pressing the welt beneath the level of the liquid in the receptacle including a freely rotatable roll, in combination with a yieldingly actuated welt feed dog mounted for reciprocation along a path parallel to the movement of the welt between the receptacle and the stitch forming devices and arranged to draw welt from the receptacle while moving in one direction and to apply a frictional action to the welt in the other direction, and a connection between the mechanism for actuating the shoe feeding devices and the feed dog to pull a slight excess of welt beneath the roll through the moistening liquid within the receptacle and to deliver it to the stitch forming devices free of tension, said connection with the feed actuating mechanism being located to impart the same excess of movement to the feed dog toward the point of operation of the stitch forming devices in the machine regardless of adjustments of the feed mechanism.

8. A welt shoe sewing machine having a main frame, stitch forming and shoe feeding devices in the frame, mechanisms connected to said feeding devices for actuating them including a cam actuated lever having a fulcrum on the frame, a receptacle for welt moistening liquid on the frame and welt immersing means mounted on the receptacle and provided with means to press a welt beneath the level of the moistening liquid including a freely rotatable roll, in combination with a welt feed dog mounted for reciprocation along a path parallel to the movement of the welt, arranged to draw welt beneath the roll from the receptacle while moving in one direction and to apply a frictional action to the welt in the other direction, and connected to the cam lever at a point further from its fulcrum than that at which the shoe feeding devices are connected to cause welt to be delivered from the moistening liquid during each sewing cycle of the machine at a rate greater than that of the feeding movement imparted to a shoe by the feeding devices.

9. A welt tempering device for use with a shoe sewing machine, having a main frame, a receptacle for moistening liquid on the frame and a welt immersing guide mounted above the receptacle and provided with means for pressing the welt beneath the level of the liquid in the receptacle including a freely rotatable roll, in combination with means for delivering the welt from the moistening guide within the receptacle comprising a guide surface along which the welt moves, a pivoted feed dog mounted for reciprocation along a path parallel to the movement of the welt and arranged to draw welt beneath the roll from the receptacle while moving in one direction, and a spring connected to the feed dog to apply a frictional action to the welt when the feed dog moves in the other direction and extending at one side of its pivot to press the welt yieldingly into engagement with the guide surface and to move across the pivot when the dog is swung about its pivot to hold the dog away from the welt engaging surface while a new welt is being inserted.

10. A welt tempering device for use with a shoe sewing machine, having a main frame, a receptacle for moistening liquid on the frame and a welt immersing guide mounted above the receptacle and provided with means for pressing the welt beneath the level of the liquid in the receptacle including a freely rotatable roll, in combination with means for delivering the welt from the immersing guide within the receptacle comprising a guide surface along which the welt moves, a pivoted feed dog mounted for reciprocation along a path parallel to the movement of the welt and arranged to draw welt beneath the roll from the receptacle while moving in one direction, a spring connected to the feed dog to apply a frictional action to the welt when the feed dog moves in the other direction and extending at one side of its pivot to press the welt yieldingly into engagement with the guide surface and to move across the pivot when the dog is swung about its pivot to hold the dog away from the welt engaging surface while a new welt is being inserted, a manually operable stud on the feed dog for swinging it away from the welt and means for limiting the movement of the feed dog away from the welt after the spring has moved across the feed dog pivot.

11. A shoe machine having a main frame, shoe feeding devices in the frame, mechanism connected to said feeding devices for actuating them, including a cam actuated lever having a fulcrum on the frame, and a guide for directing a welt into the point of operation of the shoe feeding devices, in combination with a reciprocating welt feeding dog connected to the cam lever at a point further from its fulcrum than that at which the shoe feeding devices are connected to cause the welt to be delivered to the guide at a rate greater than the feeding movement imparted to a shoe by the feeding devices, said dog engaging the welt yieldingly to deliver welt to the welt guide while moving in one direction and to apply a frictional action to the welt when moving in the other direction.

12. A shoe machine having a main frame, shoe feeding devices in the frame, mechanism connected to said feeding devices for actuating them, including a cam actuated lever having a fulcrum on the frame, and a guide for directing a beaded welt into the point of operation of the shoe feeding devices, in combination with a welt feeding dog connected to the cam lever at a point further from its fulcrum than that at which the shoe feeding devices are connected to cause the welt to be delivered to the guide at a rate greater than the feeding movement imparted to a shoe by the feeding devices, and a grooved member within the groove of which the bead on the welt is pressed by the feed dog to support the action of the dog in feeding the welt.

13. A shoe machine having a main frame, shoe feeding devices in the frame, mechanism connected to said feeding devices for actuating them, including a cam actuated lever having a fulcrum on the frame, and a guide for directing a welt into the point of operation of the shoe feeding devices, in combination with a welt feeding dog connected to the cam lever at a point further from its fulcrum than that at which the shoe feeding devices are connected to cause the welt to be delivered to the guide at a rate greater than the feeding movement imparted to a shoe by the feeding devices, a grooved member against which the welt is pressed by the feed dog to support the action of the dog in feeding the welt, and a removable plate on said grooved member for covering the groove.

References Cited in the file of this patent UNITED STATES PATENTS 1,848,960 Lyon Mar. 8, 1932 1,866,003 Ashworth July 5, 1932 1,927,954 Schoenky Sept. 26, 1933 1,972,970 Ashworth Sept. 11, 1934 2,160,826 Boulton June 6, 1939 2,321,610 Morrill June 15, 1943 2,581,638 Deering Jan. 8, 1952 2,631,564 Stautfer et a1 Mar. 17, 1953

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