US1168593A - Sewing-machine for boot-soles and the like. - Google Patents

Description

G. BEER..

SEWING MACHINE FOR BOOT SOLES AND THE LIKE.

APPLICATION FILED MAR 7, I913.

Patented Jan. 18, 1916.

fra /0w) Georg} Bee r:

E A] 70 rneyst THE COLUMBIA YuujlUURAPM (20., WASHINGTDN. D. C.

Mi. a

% TNT l TCE.

GEORG BEER, OF YVIESBADEN, GERMANY.

SEWING-MACHINE ron Boor-soLEs AND THE LIKE.

Specification of Letters Patent.

Patented Jan. 18, 1916.

Application filed March 7, 1913. Serial No. 752,610.

The object of the invention is to provide an improved machine more particularly adapted for stitching soles to the welts of footwear, butalso suitable for other work of a similar class.

The invention is illustrated in the accompanying drawing, inwhich it is shown as used for stitchlng the welt to the sole of a shoe, and in which Figure l is atop plan view of the machine. Fig. 2 is a side elevation. Fig. 3 is a bottom plan view. Fig. 4: is acrosssection of the presser bar, needle bar and cover plate, and Fig. 5 is a longitudinal section of the presser bar and means for actuating the same.

The sewing mechanism Works in the grooved guide 1 and'is covered in part by the cover plate 2 and in part by the guide plate 3. The guide 1 is arranged to turn about apivot 5 on a clamp 4, a pin6 serving to fix the guide in a horizontal position on said clamp when the machine is in use. After use, the pin 6 may be withdrawn and the machine swung up into a vertical'position. The machine is adaptedto be clamped to a table or the like by meansof the clamp 4, the screw 7 of which is provided with a grooved head 8. The clamp also serves to carry a spirit container 9 provided with a wick holder 10. This arrangement serves to warm the shuttle 11 during the sewing, in order to soften the thread, and facilitates its passage through the work. The guide 1 carries a reservoir 1 for a liquid such as tragacanth or the like. for moisteningand lubricating the thread, said reservoir be ing covered for the greater part of its length by the guide plate 3. The thread isled through the liquid in the reservoir 1 by the thread guide 12.

WVhen the machine is in its horizontal position for use, the liquid spreads over the whole of the bottom of the reservoir 1 so that the thread is moistened in passing therethrough. When the machine is out of use, and in a vertical position, the liquid flows to that part of its container which is covered, so that the thread guide 12 is clear of the liquid. 1

The machine is actuated by means of a slide 13, which is reciprocated by hand, with the aid ofa handle 14, although said slide may be mechanically operated, if desired.

A roller 15 on the slide 13 engages a slot 22 in a lever 17, the latter being by this means rocked about its pivot 21 on the plate 8. The lever 17 is also provided with a slot 20 which is engaged with a roller 19 onthe needle bar 18, the amplitude of the movement of the latter being approximately threetenths of that of the slide 13. A slot 23 in the guide plate 3 limits the movement of the slide 13. The presser bar 24 is provided with a guidegroove in which the needle bar 18 slides, the latter being covered at the top by the plate 3. Screwed to the presser bar 24, which is guided in a groove in the guide 1, is the presser foot 25. At its end, the presser bar 24: is provided with a shallow recess 2% to make room for the upper of the shoe, so that the needle can work close to the upper; this enables shoes with narrow welts to be sewn. The surface of the recess in the presser bar is substantially flush with the underside of the needle, so that the shoe can be pressed close to the needle without deflecting the same (see F ig. 2). p The presser bar 24: also carries the presser lever 26 which is rotatably mounted by means of the stud 27. The presser lever 26 is provided with a cam plate 26*, the edge of which eoacts with two pins 28 29 on the slide 1; A spring 30, coiled around the boss of the presser lever 26, tends to rotate the same, so that the edge of the cam 26 slides along the pin 29, and shifts the axis of the lever 26, with the presser bar, the presser foot 25 being pressed toward the needle plate 31. The edge of the cam 26 working against the pin 29 is provided with shallow notches, which, in sliding over the pin 29, create a certain amount of friction sothat only a fraction of the force of the spring acts onthe presser foot 25, and the latter consequently only presses the leather lightly against the needle plate 81. When, however, the needle 49 is withdrawn from the work, the presser foot 25 is, by virtue of the notches in the cam, able toresist the drag imposed on the leather by. the needle, but, when the lever 26 is actuatedby hand so that the smooth part of the cam slides on the pin 28, the presser foot is withdrawn from the work. A brake spring 32 pres ses groove 37 in'the slide 13 effect the drive of the. shuttle 11; and feeder 39. The recess 38 engages a roller 40, and the groove 37 en-v gages a roller 41 on a toothed segment 42, which is 'journaled, by means of a stout pivot46,in the guide 1. The feeder 391 is eccentrically and revolubly mounted on the pivot 46 by means of a spindle 413- A spring 48 holds the feeder 39 against the screw 47 until the feeder is actuated to perform its feeding movement. tjet screw e7 serves. to

regulate the lengthjof the stitch. The shuttle 11' is moved by a driver 45, the spindle of which carries a toothed wheel 4E4: meshing with the toothed segment. I

The stitches are made in the following manner: When the slide 13 is moved toward the. take-up, the needle is, during approxie mately'three-twentieths of this movement, retracted so as to forma thread loop for the shuttle. The shuttle 11 is rotated through approximately 20 degrees by the action of an inclined partof the recess 38, and duringthismovement itspoint enters the. thread'loop. In the further course of the slide movement, the needle is drawn out of the work, this being effected when the slide has completed about eight-twentieths of its travel, the shuttle remaining stationary during this period to avoid. damaging the needle thread while the needle-eye is passing through the work. During further movement of the slide, while it completes about thirteen-twentieths of its travel, the toothed segment 42 is rocked again by the inclined end of the recess 38, and when the roller-4O has moved out of the recess, the movement of the segment is accelerated by the action of the shoulder-37 in the groove 15.5.

37 on the roller 41. During this period, the shuttle is rotated'through approximately 200 degrees and takes up the loop of the needle thread. At the same time, the feeder 39 is pressed into the leather. The subsequent movement of the slide to the end :of its stroke actuates the take-up 35, to draw the thread, whereby the needle thread loop is drawn over the shuttle and engaged with the shuttle thread. During this period, the

work is fed'forward in, thedirection indi- The roller 15 also actuates the take-up cated by the arrow in Fig. 1 the segment 42 being turned b'y'the inclined end part 37* of the groove 37, so that the shorter arm of the feeder 39 is pressed against a stop pin 50. The point of the feeder is thus caused to shift the leather forward to the extent of the lengthof a stitch. During the return movement of the slide, 13, the. needle 49 the slide 13 has been drawn toward the takeup, the presser lever 26 is turned by hand until the presser foot 25 is withdrawn to.

the desired distance from the needle plate 31, whereupon the welt is placed between the needle plate 31 and presser foot 25, and the latter allowed to move forwardunder the .action of the spring '30. The slide 13'is then reciprocated with. the right hand, while the boot is guided with the left hand. In this manner, the thickest soles can be sewn, since only one stitch is made'during each backs ward and forward movement, andthe movement of the handle 14 is much greater than the piercing movement of the needle.

If it isdesired tosew trunks orother heavy articles, which cannot be readily held in place relative to the machine, the clamp 8 may be detached and the machine manually held in cooperative relation to the work to be done.

Having thus fully described the invention,-

what I claim as new, and desire to secure by Letters Patent, is

1. In a sewing machine, the combination of a supporting clamp adapted to be secured to a support, a .guide frame secured to said clamp for pivotal movement between a horizontal and vertical position, means for locking said guide frame to the clamp in a hori-,

zontal position, and stitching mechanism mounted on said guide frame. 2.. In a sewmg machine, a shuttle, shuttle V actuating mechanism including a toothedsegment, rollers mounted on said segment, a reactuating mechanism including a toothed segment, a reciprocating slide, means m unted 01.1 th segm n a o p a urg with the slide for imparting movement to the shuttle when the slide is reciprocated, a reciprocating needle bar, and a pivoted lever having loose connection with the needle bar and with the slide whereby the movement of the slide simultaneously imparts movement to the shuttle and needle bar, said lever being so formed that the power generated by the movement of the slide is multiplied in the needle bar, in combination with means whereby said slide is reciprocated.

4. In a sewing machine, the combination of a shuttle, shuttle actuating mechanism including a toothed segment, rollers mounted on the toothed segment, a reciprocating slide having surfaces coacting with the rollers to actuate the segment, said surfaces being so formed that the segment is moved with an interval of rest during the movement of the slide in one direction, and is also moved, with an interval of rest, during the movement of the slide in the opposite direction, a needle bar, and means including a lever connecting said slide with said needle bar, whereby the movement of the slide simultaneously actuates the shuttle and needle bar.

5. In a sewing machine, the combination of a shuttle, shuttle actuating mechanism in-' cluding a toothed segment, a work feeder actuated by said toothed segment, a needle bar, a lever loosely connected to said needle bar, and a slide having loose connection with the lever and with the segment whereby the needle bar, shuttle and work feeder are simultaneously operated when the, slide is reciprocated.

6. In a sewing machine, a guide, a presser bar mounted on said guide, a needle bar slidable in the presser bar, a lever connected to said needle bar, and areciprocating actuating slide mounted on the guide and connected to the lever whereby movement of the slide imparts reciprocating movement to the needle bar, in combination with a cam rotatably mounted on the presser bar and having a notched edge, a fixed stop on the guide, and a spring cooperating with the cam for impelling and holding the notched edge of the cam against said stop, whereby the presser bar is maintained in necting the slide to the needle bar whereby the movement of the slide reciprocates the needle bar, and means for maintaining the presser bar in engagement with the work while the sewing operation is carried on.

8. In a sewing machine, a supporting guide, an actuating slide mounted for reciprocating movement on the guide, a lever pivoted at one of its ends to the guide and having loose connection at its other end with the slide, and a needle bar mounted on the guide and having connection with the lever intermediate its point of pivoting and the slide, in combination with a shuttle, means operated by the slide for actuating said shuttle in synchronism with the operations of the needle bar, and a take-up also operated by the slide whereby the movement of the slide serves to actuate all the parts in timed relation.

9. In a sewing machine, a shuttle, a pivoted toothed segment cooperating with the shuttle for actuating the same, and means for oscillating said segment, in combination with a work feeder pivotally connected to the segment at a point exterior of thecenter of oscillation of said segment whereby the oscillation of the segment imparts eccentric movement tothe work feeder for the purpose of imparting a step-by-step movement thereto, to feed the work through the machine, and means for regulating the magnitude of said stepby-step movement of the work feeder. I

In witness whereof I have signed this specification in the presence of two witnesses.

GEORG BEER. Witnesses:

Morrrz VVETZEL, Gnone BENDER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, 1). G.

Images