US1016193A - Embroidery-machine. - Google Patents

Description

R. ZAHN. EMBROIDERY MACHINE. APPLICATION FILED DEC. 17, 1909.

1,016,193. I Patented m 30,1912.

ROBERT ZAHN, OF PLAUEN, GERMANY.

EMBROIDERY-MACHINE.

Specification of Letters Patent.

Patented Jan. 30, 1912.

Application filed December 17, 1909. Serial No. 533,508.

movements of the mechanism are controlled by a jacquard device.

In the accompanying drawing, Figure 1 shows those parts of the machine which are important for the understanding of this invention in side elevation, viewed from the left, and Fig. 2 is a perspective view of a detail of Fig. 1.

At the front side of the embroidery surface :22 are, as is well known, series of needles 1 securedto rails 2, of which two for two series of needles are shown, superposed in the present example, and which, together with the rods 3 form a rigid whole. The rods 3 are longitudinally movable in bearings 4, and are capable of being horizontally reciprocated therein by means of mechanism not shown in the drawing, for the purpose of forcing the needles 1 with their threads through the embroidery surface 00, to produce the embroidery design. The thread is drawn oil from the supply spool 8 and carried around the guide roller 7, to and over the,two guides 6 and 5 and from here to the needle 1. At the moment in which the thread is to be drawn taut at the needle 1, the roller 7 must be held stationary. To this end the roller 7 is provided with a ratchet wheel 9, with the teeth, of which a pawl 10 is caused to engage, 1n order to stop the roller at the instant required. Each pawl 10 is arranged on a lever 11, and all these levers are connected or pivoted to a common connecting rod 12. Secured to the main shaft 13 of the machine is a cam 14, the circumference of which engages with a roller 15, which is rotatably journaled at the end of the rod 12. Each revolution of the main shaft 13 causes the cam to raise the connecting rod 12, .thereby releasing the roller 7 at the instant required for the take up of thread by the needle 1.

Some embroidery patterns are sometimes enriched by a thick cord secured thereto 1n the form of astraight horizontal relief line. To this end arms 16 are secured at both ends of the embroidery to a common shaft 17 (Fig. 2) allotted to each needle series. Ar-

ranged at the end of eacharm is a hook 18. The two shafts 17 of the upper and lower needle series are movably connected by aconnecting bar 19 in such manner that on moving the bar both hooks 18 are simultaneously so moved toward the embroidery surface aas to precisely coincide with the.

line of points at which the needles 1 enter the embroidery. Thus, if a cord is carried by the hooks 18 and the arms 16 are swung forward by the connecting bar into the position 16, shown in dotted lines, while the machine is running, the cord will be sewn or fixed by all the needles 1 of each series to the embroidery surface as, which is the object of the cord inserting device 16, 17', 18, 19, just described. All working movements of the whole embroidery machine are controlled by a jacquard device and the main shaft 13 effects the drivin' of all parts.

In the drawing the jacquar 'jdevice is indicated by the square box 20, 21, 22, 23 and only those parts are shown wb fich are essential for the understanding-of the invention.

Secured on the shaft 24 of the jacquard device is a toothed wheel 25 having twice as many teeth as a toothed wheel 26 which is mounted on the main shaft 13 and with which it engages. Thus, while the shaft 2 1 makes one revolution, the main shaft 13 makes two revolutions. Secured to the shaft 24 is a cam having a cam groove 27, 28, 29, 30, within which is guided a roller 31 on the arm of a bell crank lever which is pivoted at 32. The portion between the points 27, 28 and the portion between the points 29, 30 of the cam grooveare concentric with the shaft 24. Thus, as long-as the roller-31 travels along these circular parts of the groove, the bell crank lever 31, 32, 33 remains stationary and only when the roller is guided in the descending portion 2928 and in the ascending portion '2730, is the bell crank 1ever operatedj Movably attached to the free end 3 1 of the cord carrying lever 17, 16, is a coupling rod 35, the other end of which carries a head 36. The upper and the lower faces of this'head 36 are each provided with a recess of which the lower one is adapted toengage with the free end 33 of the cam operated lever, while the upper recess is capable of cooperating with one or the other of two stationaryabutments 37 38. The coupling rod 35 is loosely supported within a head portion 39 of a rod 40 which from time to time is reciprocated in the directions of the double arrow 41. The displacement of the rod 40 in these directions is due to the jacquard mechanism according to the nature of the pattern to be embroidered.

The operation of the described mechanism is as follows;:-Assuming the main shaft 13 to be rotating'and all the mechanism partaking in the ordinary embroidery process to be in regular working. The needles 1 enter the cloth w and the connecting rod 12- releases the thread guide rollers 7 at the required intervals in which operation the lever 31 33 is constantly rocked without, however, producing any effect. Supposing now the moment to have arrived in which a cord is to be attached to the embroidery. At this instant the jacquard causes the rod 40 to move so that the head 36 of the coupling rod is removed from engagement with the stationary abutment 37 and moved on to the lever end 33. Consequently when the roller 31 of the lever comes into engagement with the cam portion 2928, the rod 85 will be moved to the right and then the rod 40 is again moved to a small extent, in the opposite direction, whereby the head 36 comes into engagement with the abutment 38. By this operation the levers 16 are brought into the position 16; and simultaneously the connecting bar 19 is caused to strike with its abutment 42 against an abutment 43 on the connecting rod =whereby the two locking pawls 10 are lifted out of engagement with the teeth of tee c orresponding ratchet wheels 7. While all this is taking place, two attendants have seized a long cord at both ends and inserted it in the hooks 18, and this cord is immediately sewn on by all the needles 1. As soon as this sewing on. is effected, for which only a few A working movements of the needles 1 are required the levers 16 are brought back to their initial position. To this, end the rod 40'is so moved by the jacquard deyice that the head 36 of the coupling rod 85 is moved from the stationary abutment 38 on to the lever end 33 and back again to the stationary abutment 37.

In automatic jacquard devices as hitherto used for embroidery machines, besides the rod 10, another automatic mover was necessary for the purpose of pushing the thread releasing rod upward as soon as the cord inserting mechanism 16, 17, 18, 19 became operative. The object of the present invention is to bring about this necessary moving up of the rod 12 without the aid of a second jacquard driving member or mover by the movement of the rod 40 itself with the ald of the two abutments 4:2, 43 whereby the automatic embroidery machine is greatly simplified. The manufacture of the ma chine is moreover accordingly cheapened and interruptions or difliculties in the working of the mechanism occur less frequently roiaiee than hitherto where the usual devices were used. Also the production of the perforations in the card slip, the so-called jacquard card, is simplified, because the special perforations for a second jacquard mover are no longer necessary and consequently the number of errors in the embroidery .patterns, often caused by negligence of the pattern maker, is thus considerably decreased.

I claim: 1. In an embroidering machine, sets of needles and means for operating the'same,

means for braking the needle thread supply, means for applying ornamentalcords to the surface of the work, and means for operating the latter means having devices attached thereto for acting upon the braking mechanism.

2. In an embroidering machine, sets of needles and means for operating the same, means for braking the needle thread supply, means for applying ornamental cords to the surface of the work, .means for operating the latter means having devices attached thereto for acting upon the braking mechanism, and an automatic jacquard for controlling the means operating the cord applying means.

3. In an embroidering machine, sets of needles and means for operating the same, means for braking the needle thread supply, means for applying ornament-a1 cords to the surface of the work, a device for moving said latter means in and out of operative position, an automatic jacquard for controlling said device and means cooperating with said cord applying mechanism for releasing the braking mechanism.

4:- In an embroidering machine, a rocking mechanism for applying cords to the surface of the work, a reciprocatory rod attached to said mechanism, an automatic jacquard device, and a connecting rodintermediate the jacquard and thereciprocating rod, and a cam operated lever for moving the said reciprocating rod at predetermined times, said jacquard operating on said reciprocating rod to move the same from its'normal connection with said cam operated lever.

5. In an embroidery machine, the combination with sets of needles and means for operating the same, of means for applying ornamental cords to the surface of the work, means for braking the needle thread supply, an automatic jacquard device, means controlled by the latter for operating both the cord applying means and the thread supply braking means and having devices attached thereto for acting upon the braking mechan1s-m.

6. In an embroidery machine, the combination of means for applying ornamental ply, an automatic jacquard device, means intermediate the latter and the cord apply-- ing means for controlling the latter, and cooperating means between the-cord operating device and the thread controlling means for releasing the thread when the cord is applied to the work.

7. In an embroidery machine a cord applying device comprising a rocking arm, a cord support thereon, a rod for rocking said arm and a projection on said r.0d,a thread controlling mechanism comprising a toothed wheel and pawl, a rod to which said pawl is connected, and a lug on said rod adapted to engage with the-projection, and means for moving the rod operating the rocking arm at predetermined times, substantially as set forth.

8. In an embroidery machine a cord applying device comprising a rocking arm, a cord support thereon, a rod for rocking said arm and a projection on said rod, a thread controlling mechanism comprising a toothed wheel and pawl, a rod to which said pawl 'is connected, and a lug on said rod adapted to engage with the projection and an automatic jacquard controlled device for moving the rod operating the rocking'arm at predetermined times substantially as set forth.

9. Inv an embroiderymachine comprising a cord applying mechanism, a thread controlling device and an automatic jacquard device, a driving shaft, a toothed wheel and a cam on said shaft, a rod connected to thethread controlling mechanism' operated by said cam, a second toothed wheel gearing with the said toothed wheel, a shaft carrying said second toothed wheel and forming the shaft of said jacquard device, a cam mounted on said shaft and a pivoted lever operated by said cam and cooperating with the cord applying mechanism substantially as set forth. a

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ROBERT ZAHN.

Witnesses:

B. T. MURPHY, EUGENE LABIL.

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