US540462A - Machines - Google Patents

Description

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M. SOHOENPELD. STITGHIADJUSTING MECHANISM FOR EMBROIDERING MACHINES.

Patented'June 4 18975.

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M. SCHOENFELD. STITCH ADJUSTING MEGHANISM FOR BMBROIDERING MACHINES. No. 540,462.

Patented June 4, 1895.

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M. SGHOENFELD. STITGH ADJUSTING MECHANISM FOR EMBROIDBRING MACHINES.

No. 540,462 PatentedJu ne 4, 1895.

UNITED STA ATENT (FFICE.

MORRIS SCHOENFELD, OF RORSOHAOH, SW ITZERLAND.

STITCH-ADJUSTING MECHANISM :FOR EMBROIDERING MACHINES.

SPECIFICATION forming part of Letters. Patent No. 540,462, dated June 4, 1895. Application filed Dfltember l L Serial No. 414,130. (No model.) Patented in Germany November 20, 1891, T

T0 at whom it may concern: Beitkuown that I, MORRIS Sononnnnnma citizen of the United States'of America, residing at Rorschach, Switzerland, have invented certain new and useful Improvements in Automatic Stitch-Adjusting Apparatus for Embroidering-Machines, (for which I have obtain ed Letters Patent in Germany, No. 63,946, dated November 20, 1891,) ofwhich the following is a specification.

This invention relates to improvements in embroidery-machines and the object of my invention is to control and regulate the movements of the fabric-holding frame of an embroidery-machine' by means of a strip of paper, fabric or like material provided with holes in accordance with the pattern to be reproduced. v

The invention consists in mechanism operated from the embroidery-machine driving shaft and controlled by a pattern sheet or strip having holes for receiving pins which at times are engaged by tappet screws moved by swinging arms from which motion is transmitted to the tambour frame, said motions being up or down or to the right or left in any desired order as may be necessary so as to shift the tambour frame successivelyin such a manner that any desired pattern can be embroidered by the machine on the fabric held on the tambour frame.

The invention also consists in the construction and combination of parts and details as.

will be fully described and set forth hereinafter and finally pointed out in the claims.

In theaccompanyingdrawings, Figure l is a front elevation of my improved attachment and of the end part of an embroidery-machine.

Fig. 1 is a plan view. Fig. 2 is a side view of my improved pattern attachment. Fig. 2

is a side view, in section, on the line 1/ 'y' of i a reciprocating motion. rigidly connected'with the three racks e a e diagrammaticalviews illustrating the movements of the parts.

' Similar letters and numerals of reference indicate like parts in all the figures.

The apparatus is operated from the disk B,

mounted on the main shaft A of the embroidery machine, which disk by means of the connecting-rod O oscillates the lever D "and the shaft a rigidly connected therewith. (See Figs. 1*,2, and 2 A second arm dof the shaft (1. transmits these oscillating movements by means of the rod 0 to a slide-piece 0' (see j Figs. 2 5, 5 and 5 which slide-piece c is guided by suitable guides c 0 so as to have The slide-piece c is which, as shown in Figs. 1, 2 5, 5 and 5 iengage the three cog-wheels f, f f that are mounted loosely on the vertical shaft g fixed on the frame Nof the apparatus.v (See fFigs. 1 and 2 The rack e engages its cor- :responding cog-wheel f on that side of the shaft g opposite the one at which the racks 5e e engage their cog-wheels, so that the movement of the slide-piece 0" causes the :cog-wheel f to vrotate in reversed direction to that in which the cog-wheels f and f are @rotated by their racks e and 6 ;wheels f and f ,-whicl1 are turned in the :same direction by their racks e'and e engage these wheels on the same side of the shaft g {The cog-wheels h and 77. Figs. 3, 5, 5 and 5", fare rigidly connected, with the co -wheelsf and f which cog-wheels h k transmit to the jracks i and '5 and their connecting-piecei (Figs 8 and 4) a corresponding reciprocating {-motion when the slide-piece c is moved. The connecting-piece i is further provided with four adjustable tappets It 10 10 and (Fig. 6}, I which can be adjusted to project more-or less ,from the connecting-piece i by means of suitable threads, and which tappets during the movements of the connecting-piece i can act on four corresponding pins Z Z l and Z The cog-.

paper or sheet, it is pressed by its spring into the same and moves to the front, whereby it is moved out of the path of movement of the tappet k, which can now pass by the same without acting on it. (See Fig. 6.) Each pin Z Z Z and Z is connected with one of the racks m m m and m, which slide in the guides M on the fixed shaftg and which racks engage the loose cog-wheels n n n n on the shaft g, and on the hubs of said cog-wheels swinging carrier-arms o o o are fastened, which carry the pivoted pawls g g q, which are pressed by springs against the ratchet-wheels E, E, F and F respectively (Figsti and 4), as will be set forth hereinafter. If one of the pins (P, for example) is pushed along by the tappet k it carries along the rack m and thereby moves or turns the cog-wheel n whereby the carrier arm 0 is moved from its initial position until the pin l drops into one of the holes of the pattern paper or chart P. At this moment the tappet it passes over the pin 1 and the arm 0 remains at rest and the pawl g drops under the action of its spring in engagement with the teeth of its ratchetwheel. The cog-wheelsf'f are also provided with arms 8 s and the cog-wheel f is provided with the two arms .9 and .5 which carry screws s", Fig. 4, which when the arms swing strike against wings of the pawls q (1 g and (1 The motion is transmitted in the apparatus in such a manner that the arms .9 s s and s at the same time describe a greater path than the carrier-arms o 0 o and 0 so that during the forward motion of the slide-piece i the arm 3 will swing back farther than the arm 0 which is held, as its pin has dropped into one of the holes of the pattern chart or paper. Accordingly as this stopping takes place sooner or later the size of the movement of the embroidery frame is controlled. If during the return motion of the piece 0' the racks e e and e begin their return movement, the arm 3 for example, strikes at a certain fixed position the pawl g of the carrierarm 0 and the latter and also a ratchet-wheel engaged by said pawl g is swung in the direction of the movements of the hand of the clock back to the starting position of the swinging arm.

The above mentioned ratchet-wheels work in pairs with each other, and of the pair E E one is at each side of the toothed wheel E and of the other pair F F one is at each side of the toothed wheel F and rigidly connected therewith. The toothed wheels E and F can turn on the disks E and F", that are rigidly connected with the axle G. The ratchetwheels E and E which are firmly connected with the opposite sides of the toothed wheel E, have their teeth inclined in the opposite direction, as shown in Fig. 4, so that the toothed wheel can turn either to the right or to the left, according as the pawl q is engaged with the ratchet-wheel E or the pawl g is engaged with the ratchet-wheel E In an analogous manner the ratchet-wheels F and F are arranged in relation to the toothed wheel F.

If, for example, as shown in Fig. 4, the pawl g is engaged with the ratchebwheel E and is pushed forward by the carrier-arm s and the ratchet-wheel E and the toothed wheel E is to be turned, the second pawl q must be disengaged from the ratchet-wheel E, which is accomplished by the lug H fixed on the frame, which lug carries at the same height as the pawl q aspring-pin t. Corresponding springpins are also arranged for the other pawls; forexample, the spring-pin t for the pawl Fig. 4. If the arms 8 s s and s all swing back until their pawls g g g strike against the lug H, that is, until the spring-pins 15' and t the, are pressed back into their sockets, then all the pawls g Q2 g g are pressed by their springs on the corresponding ratchetwheels and thereby the toothed wheels E and F are held at absolute rest. As soon as one of the arms, for example, 8, (Fig. 4,) is moved from its corresponding pawl q the corresponding spring-pin t is pressed by its spring to the front and throws back the pawl of the arm that has remained at rest and thus destroys the connection between the pawl q and the ratchet-wheel E, so that the ratchet-wheel E can freely move and turn the toothed wheel E. The two toothed wheels E and F engage the cog-wheels I and 1 of which the former is rigidly secured on the shaft I, whereas the latter is mounted loosely on the shaft I and engages the cog-wheel K of the spindle K. By the turning of the spindle K a support K is moved vertically, said support K carryinginsuitable bearings the horizontalspindle L on the end of which a bevel cog-wheel L is fixed and which engages and is rotated by the bevel cog-wheel I that is so mounted on the shaft las to turn with the same by means of aspline, so that said wheel 1 can be shifted on the shaft. Thereby the nut M mounted on the spindle L is adjusted horizontally, which nut carries the embroidery frame 0.

The not M and the embroidery frame perform a movement which is the resultant of the movements of the two toothed wheels E and F, that is,a movement corresponding to the distance between the holes of the pattern paper. The connection N between the nut M and the embroidery frame 0 can be disconnected by raising the cover of the hearing, so that the embroidery frame can be shifted independently of the above described mechanism, for performing certain operations without requiring any change on the above described apparatus.

The pattern chart or paper P (Figs. 1, 1 and 2) is rolled on a Wooden roller Q, and is guided to the roller R and to the roller S, upon which it is again rolled. If the pattern has been embroidered, the pattern paper or chart is wound back around the roller P, the cord 19 passing over guide-rollers 'r and kept taut by a weight 19 serving for the purpose of keeping those parts of the pattern chart or paper that are not operating taut on the rollers P and 'S.- For the purpose of protecting lever to on the shaft a (Fig. 2), which lever by means of the rod 11. and the pawl 11. turns a ratchet-wheel connected with the roller B. By means of the lever 1;, also mounted on the shaft a, the rod o and the pawl 0 a wheel to is operated periodically, whereby by means of the levers w and w the pattern chart or paper 13 is brought at the proper time in contact with the pins l, Z Z and Z and moved from the same respectively for the purpose of protecting said chart fromjundue wear. In the lever d (Figs. 2 and 2), which operates the slidepiece 0', the pivot d of the rod 0 can be adjnsted and the stroke of the entire mechanism thus changed, whereas the movements of the pattern chartp remain the same. For example, if a pattern is to be embroidered that only has short stitches, then thestroke of the racks c c 0 can be decreased, and thus the number of strokes increased without requiring the mechanism of the apparatus itself to have greater speed in relation to the distance to be traveled; in other words, for small stitches the apparatus can make a greater number in the same time and for larger stitches-it makes a less number in the same time. v

The operation is as follows: The slide a with its three racks and wheels f f f is reciprocated at regular intervals. Thereby the arms ss s sflwith their lugs s are swung and the connecting-piece @with its tappets, is reciprocated. These tappets 7t 70 k 10 move the pins Z Z 'Z Z along and swing the pawls. Figs. 1 and 1 show the arrangement of the holes in the pattern paper; and 1 corresponds to the movement to the right, 2 to the left, 3 upward, and 4 downwardrand it is evident that oftwo holes that represent opposite movements one must be directly un- 7 der the starting position of its pin and the other must be a greater or less distance away from the first hole;'that is, from the starting position of the pin. The first kind of holes will therefore always be in one row and the second kind corresponding to the stitch will have corresponding positions to theleftand in any suitable manner and without depending upon the subdivisions ofthe stitch-regulating devices used heretofore. By this arrangement of the holes'it is desired to accomplish the turning of one of the pair of carrierarms 0, 0 or the pair 0 0 while the other remains stationary, for, at the moment that the turning of one of said arms begins the pattern paper or chart 10 is pressed by the devices previously described against the pins:

1' Z and Z? Z and thereby a tappctis moved into the corresponding hole of the pattern chart by the two pairs of pins Z l and Z Z. Thus the movement of the corresponding rack of the carrier-arm is stopped from the start, so that only the movements 1 or 2, and 3 or 4:, Figs. 1 and 3, can take place. These movements of the carrier-arms 0' 0 and the arms 8' s are shown diagrammatically in Figs. 7 to 9. Fig. 7 shows a position after the connecting piece 7) has arrived at its end position in being pushed over the pattern chart or paper. The arms 8 s with their lugs s are also in their end position, whereas the carrier-arm 0 by means of its pin Z engaging in the corresponding hole in the pattern chart, is locked in its desired position. The carrier-arm 0' could perform no movements whatever, as at the beginning of the operation it is held by its pin that has dropped into one of the holes, whereas at the same time its pawl has been disengaged from the teeth of a corresponding ratchet-wheel E by the pin 25. (See Fig. 4.) Fig. 8 shows the return movement. The arm 3 turns freely, the arm s strikes, according to the pattern, sooner or later against the carrier-arm 0 and turns the ratchet-Wheel E until the two arms .9 s arrive at the starting positionthat is, until the arm .9 strikes against the carrier-arm o'the pawl q and presses back the pin 15', permitting the pawl to engage the ratchet-wheel E, whereby the toothed wheel E, which was formerly moved in the same direction as the arm .9 is now locked. The toothed wheel E in this case transmitted the movement to the nut M to the embroidery frame 0 in the direction 2, that is, moved the same to the left. The toothed wheel F operates in a similar manner, and if the same during the left movement that has just occurred is turned in the direction of the ratchet-wheel F the movementsof the embroidery frame will be 2 and 3, that is, to the ,left and upward.

Havingthus described my invention, what I claim as new, and desire to secure by Letters Patent, is

- 1. The combination, with an embroiderymachine tarnbour-frame, of mechanism for shifting the same vertically and horizontally, gearing for operating said mechanism, pins connected with said gearing and for operating the same, means for shifting said pins in a plane parallel with the surface of the patternsheet or strip and in contact with the same, and a pattern-sheet or strip provided with holes into which said pins can pass so asv to avoid the shifting means, substantially as set forth.

2. The combination, with an embroidery machine tambour-frame, of mechanism for shifting said frame vertically and horizon tally, gearing for: operating said mechanism arms connected with the gearing and provided with a series of pins, a reciprocating-frame having projections for engaging and shifting said pins in a plane parallel to the surface of a pattern-sheet or strip and in contact with the same, and a movable pattern-sheet or strip provided with holes into which said pins can pass so as to avoid the projections of said reciprocating-frame, substantially as set forth.

3. The combination, with an embroidery machine tambour frame, of mechanism for shifting the frame vertically and horizontally, cog-wheels for operating said mechanism, ratchet-wheels connected in pairs with said cog-wheels, swinging arms, carrying pawls for engaging said ratchet-wheels, cog-wheels formed on said swinging arms, reciprocating racks for engaging said cog-wheels, movable pins on said racks, a movable pattern sheet having holes into which the pins, when moved over said pattern sheet can pass, mechanism for moving the pattern-sheet and a reciprocating frame having projections for acting on said pins, so as to cause them to pass over the pattern sheets, substantially as set forth.

4. The combination, with an embroiderymachine tambour-frame, of mechanism for moving said tambour-frame vertically and horizontally, cog-wheels for operating said mechanism, two ratchet-wheels having opposite teeth, for each cog-wheel, a swinging-1ever for each ratchet-wheel, a pawl on each lever, a cog-wheel formed on each lever, a rack engaging each cog-wheel, a movable pin held in the end of each rack, a movable patternsheet or strip having holes into which the pins can pass, mechanism for moving said patternsheet or strip, and a reciprocating-frame having projections that can act on the pins, substantially as set forth.

5. The combination, with an embroidery machine tambour-frame, of mechanism for moving said frame vertically and horizontally, cog-wheels for engaging and driving said mechanism, two ratchet-wheels having opposite teeth at opposite sides of each cog-wheel and connected therewith, a lever for each ratchet-wheel, a pawl on the end of each lever,a cog-wheel formed on each lever, a rackbar engaging each of said cog-wheels, a movable pin in the outer end of each rack-bar, a movable pattern-sheet or strip provided with holes into which said pins can pass, mechanism for shifting the pattern-sheet, a reciproeating-frame having projections that can act on the pins and the rack-bars, swinging arms that can act on the pawls, cog-wheels formed on said swinging arms, rack-bars engaging said cog-wheels,and a reciprocating-frame with which said rack-bars are connected, substantially as set forth.

6. The combination, with an embroiderymachine tambour-frame, of mechanism for shifting the tambounframe horizontally and vertically, two cog-wheels engaging said mechanism, two ratchet-wheels having opposite teeth, connected with each cog-wheel, a swinging arm for each ratchet'wheel, a pawl on each swinging arm, a cog-wheel formed on each swinging pawlarm, a rack-bar engaging each cog-wheel, a movable pin held on the outer end of each of said rack-bars, a pattern-sheet or strip having holes through which the pins can pass, mechanism for moving the patternsheet or strip, a reciprocating cross-piece having projections that can act on the pins, a reciprocating-frame, rack-bars on said frame, cog-wheels with which said rack-bars engage, an arm on each cog-wheel, a projection on the end of each arm, which projection can act on the pawls of the ratchet-wheels, and springstops against which the pawls can strike, substantially as set forth.

7. The combination, with an embroidery machine tambonr frame, of mechanism for moving the same horizontally and vertically, gearing for operating said mechanism, rackbars engaging said gearing, pins on said rackbars, a movable pattern-sheet or strip having apertures into which the pins can pass, means for moving said pins over the pattern-sheet, a reciprocating pin provided with projections that can act on said pins on the rack-bars for moving them over the pattern-sheet or strip and a rocking lever for pressing the pattern sheet or strip against the pins for the purpose of bringing them into the path of the reciprocating frame, substantially as set forth.

In testimony whereof I hereunto sign my name, in the presence of two subscribing witnesses, this 3d day ofNovember, 1891.

MORRIS SGHOENFELD.

Witnesses:

S. H. M. BYERS, JOSEPH SIMON.

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