US1643449A - Jacquard mechanism for embroidering machines - Google Patents

Description

Se t. 27 1927.

p M. HADAM JACQUARD MECHANISM FOR EMBROIDERING MACHINES Filed May 15, 1925 H mg efyd y CMwnd shown.

Patented Sept. 27, 1927.

UNITED STATES 1,643,449 PATENT OFFIQE.

MAX HAIDAM, OF CEIEMNITZ, GERMANY, ASSIGNOR TO MASCHINENFABRIK KAPPEL,

A.G., OF CHEMNI'I'Z-KAPPEL, GERMANY.

JACQUARD MECHANISM FOR EMBROIDERING MACHINES.

Application filed May 15, 1925, Serial No. 30,580, and in Germany July 9, 1924.

This invention relates to jacquard operated mechanism for braiding, net or lace making machines and the like, of the kind shown in US. Patent 1,005,436 granted to Johann Jacob Knecht, October. 10, 1911 wherein the various motions of the needles as controlled by the jacquard mechanism are transmitted to planet wheel carriers which co-act with planet gear to cause axial displacements of endless screws, such displacements controlling the position of the embroidery frame. In such machines the planet wheel carriers are at present caused to oscillate through their required angles by means of complicated toothed mechanism, which is expensive to produce, and which, when worn, causes irregularities in the extent of the oscillation of each separate planet wheel carrler.

The object of the present invention is to avoid these objections, and this is effected by transmitting the motions of the needles as determined by the jacquard mechanism to the planet wheel carriers by means of lever pawls, and employing a stop-lever to hold each carrier in its exact position. The transmission of motion from the planet wheel carriers to the embroidery frame is performed as at present.

'The invention is illustrated diagrammatically by way of example in the accompanying drawings, in which for the sake of clearness, only one drive for a planet wheel carrier as effected by the jacquard mechanism is In the drawings,

Figure 1 is a side view thereof.

Figure 2 is a front veiw of a series of planet wheel carriers and of the accompanying pawl levers which effect their oscillations. The planet gear for the planet wheel carriers is not shown in detail since it is known and furthermore the present invention is not concerned therewith.

In carrying the invention into effect, the

' known series of differential drives constituted by the planet gears such as shown in U. S. Patent No. 1,005,436, referred to above are mounted on a shaft 3,'which is supported in the side frames 12 of the machine. The planet wheel carriers 4 are in the form of discs, of which seven are shown in Figure 2, arranged side by side on the shaft 3. The discs 4 are mounted loosely on the shaft 3 as in known practice but co-act with planet gear as before described to transmit motion to the embroidery frame. They receive their partial rotation selectively according to the pattern of the jacquard card. They have mounted on them engaging membersin the form ofpins or rollers 5, spaced apart at equal distances. Beneath the differential shaft 3 and parallel therewith is mounted a shaft .6, on which are uloosely pivoted the levers 7. These levers are arranged one. pair at each slde of the machlne and the respective pairs are connected by spindles 8 and 9, on which there are also loosely mounted the pawl levers 11 and on opposite sides of the axis of oscillation 8 of the planet wheel carriers 4. By means of a cam 12, shown in Figure l, a slide 13 is caused .to rise and fall in guides, and this slide is connected by rods 14 and 15 to the spindles 8 and 9 respectively, the latter being thereby caused to rise and fall, pivoting about the axis 6. The extreme end positions of the spindles 8 and 9 are indicated in Figure 1, in full and dotted lines. The distance between. their extremepositions exactly corresponds to the distance apart of the pins or rollers 5 on the planet wheel carrier discs 4. At a point to one side of the mechanism described, and above the level of the shaft 3, there is supported a spindle16, on which stop-levers 17 are loosely pivoted, one such lever being provided for each of the discs 4. Each stop-lever 17 has a groove at its frceend adapted in the swinging of the lever to embrace one of the pins 5 of the planet wheel carrier, when the oscillating movement of the said carrier has been completed by the selected pawl lever 10 or 11, as hereafterodescribed. V I The pawl levers 11 have each a nose piece at their upper ends, which are adapted to engage the inclined grooves 17 on the I lower side of the-stop-levers 17 Y and raise them out of operative position priorto the commencement of the oscillating movement of the planet wheel carriers 4. I

The direction of oscillation of any given planet wheel carrier disc is determined by the jacquard card mechanism, which is illustrated diagrammatically at the left hand 1 side of Figure 1. This mechanism selects the pawl lever 11 or the pawl lever 10 as the effective operating member for the oscillation of the carrier, and thereby determines whether the said carrier will oscillate in a clockwise or a counter-clockwise direction.

Thejacquard card 18 is fed over the bar 19, which is moved backwards and forwards in the known manner each advance of the.

perforation in the jacquard card, the said needle is undisturbed, but if no perforation is on the card, the needle 20 is moved to the "right looking at Figure 1. The needles 20 are att-achcdto jacks 21 and 22, which have butt-s 23 and 24 adapted to cooperate or not, according to the position of the perforations on the jacquard card '18 with the feeler levers 28 and 29.

Loosely mounted on a spindle 25 there is a lever 26, which is adapted to be oscillated in step with the rising and falling of the slide 13, by means of a connecting rod 30. The connecting rod has an elongated slot 30 atits end, and the pin 26 'on the lever 26, which engages inthis slot, is held against the lower endthereof, by means of a spring 88. The lever 26 carries a cross-spindle 39,

on which the three-armed lever 27 is mounted; On the horizontal arms 27 --27 of this lever are pivoted the feeler levers 28 and 29 which co-operate with the butts 23, 2- l'ofthe jacks 21, 22 as above mentioned; and tot-he vertical arm there is connected a link 83, which operates the end of the pawl levers 11 and 10, which are held apart, one on each side of the centre ofoscillation 3 of the planet wheellcarrier' 4 at the required dis tance, by means of a tie linlrE-St. The link 34: islof suchlei'igth thatboth pawl levers 10 and 11 may be out of engagement at the same time. The three-armed lever 27, by its articulation to the pair of pawl levers, is adapted to move these levers in unison transversely to the axis of rotation of the planet wheel carriers, and thereby tobring one or other of the pawl levers 10 or 11 into operative position.

Connected with the mechanism described there is a 111210111118 stop gear provided; which may be of any convenient form, and is set in operation by the mechanism here described. In the form shown, the actuating mechanism is illustrated as a Bowden wire mechanism and comprises central core wire 37, which; passes through the outer cable 36, which is fixed to some point on the rod 30. The core was 37 is fixed to some suitable point of the lever 26, near to its free end. it

The method ofoperat'ion of the mechanism isas followsc p ,The jacquard cylinder 19 on its approach presses for example the needle 20; connected to the jack 22, from left to right,.'looking at Figure 1, whereby the butt 24 ismoved out of alignment with'the feeler lever 29. If the jack 21 had beense'lecte'd', the butt 24 would have remained in alignment with the In this and synchronizes with the downward movement of the cross-spindle39, under the action of the lever 26. In this way the threearmed lever 27 is tilted in a clockwise or counter-clockwise direction, when the lever 26is moved downwardly. At the same time,

the slidel3 is at the upper end of its travel, and m the position illustrated in Figure 1, the three-armed lever 27 has been tilted to move the pawl lever 11 into engagement with oneof the pins 5 on the disc t showmwhilst the pawl lever 10 is left free. During this engaging movement of the lever 11, the nose slides along the inclined groove 1'7 on the underside oflever' 17, therebyraisingthe said lever out of engagement with thepin or roller 5, which it was embracing. The disc 4 is thenfree to rotate.

When the slide 13 moves downwards, the disc 4 is rotated'through an angle corresponding to the distance apartof the pins or rollers 5. At the same time the connecting rod 30 has'moved the lever 26 upwards, so that the arms 27 --27 of the three-armed 'pawl lever 11, whe11 inthe dotted position lever"27 impinge against the fixed rails illustrated in Figure 1, is withdrawn from engagement with the pin or roller 5, and the stop-lever 17 thenengagespover the next pm on the disc. The disc has thus been given a counter-clockwise movementthrou-gh' an angle of degrees in the form i'llustrat- I ed. It will be readily understood in the event of the butt24 coming into operation, the rotation of the 'discwould be through an angle: of 60 degrees in a clockwise direction.

If the jacquard card should be torn, or shon ld any mistake have been made in pen forating the card, both jacks 21 and 22 will remain undisturbed, and both butts 23 and 2a will register with the feeler 1- ods 28 and 29. In thiscase the lever 26 willbe arrested before it completes its downward movement, and the continued downwardmovement of the connecting rod 30 will cause the spring 38 to stretch, andthe core 87 of the Bowden Lriers co-acting with planet gear to actuate the embroldery frame; means for opera-tlng Lea-ch planet: wheel carrier, comprising, a air of pawl levers, members 011 the planet w eel carrier adapted to be engaged by one or other of the said pawl levers, means for moving one or other .of said pawl levers into engaging position, a stop-lever and means for disengaging the stop-lever from the planet wheel carrier when the selected pawl lever is brought into engagement with one of, the engaging-members of the planet wheel carrier.

2. In a lace machine planet wheel carrier, (as in claim 1) comprising two lever pawls, located one on each side of the centre of oscillation of the planet wheel carrier. pins on the planet wheel carrier with which one or other of said pawl levers engages to oscillate the planet wheel carrier in one or other direction, jacquard actuated means for selecting which of the pawl levers is in engaging position, a stop-lever adapted to on gage one of the pins on the planet wheel carrier, and means on the pawl levers for disengaging the said stop-lever as one or other of the pawl levers is placed in engaging position.

3. In a lace machine planet wheel carrier (as in claim 1) comprising two pawl levers located one on each side of the axis of oscillation of the carrier, a link connecting said pawl levers and holding them at a predetermined distance apart, means for raising and lowering said pawl levers together, pins on the planet wheel carriers spaced apart at equal distances and with which said pawl levers are adapted to engage, a three-armed lever articulated to said pawls to move them in unison transversely to the axis of oscillation of the carriers to engage one or other of said pawl levers'with the pins on the carrier, feeler bars on the said three-armed lever, jacquard-operated jacks co-operating with said feeler bars, an oscillating lever carrying said three-armed lever and moving said feeler bars into engagement with said jacquard operated jacks, and a stop-lever for arresting the carrier in the position to which it has been moved by the pawl lever.

4;. In a lace machine wherein the motions of needles actuated by jacquard card mechanism are transmitted to planet Wheel carriers co-acting with planet gear to actuate an embroidery frame, the combination of side frames, a transverse shaft supported in said frames, planet wheel carriers grouped on said shaft, two pawl levers for each planet wheel carrier arranged one on each side of said shaft, 21 second transverse shaft, levers mounted on said second shaft at each end thereof, cross bars connecting said levers and on which said pawl levers are mounted, means for oscillating the levers on said second shaft, a rod connecting said pawl levers to hold them apart at a predetermined distance and jacquard-operated means for oscillating said pavvls in unison transversely to the axis of rotation of the planet wheel'carriers to select which of said pawl levers shall operate the said carrier, substantially as described.

In a lace machine wherein the motions of needles actuated by jacquard card mechanism are transmitted to planet wheelcarriers co-acting with planet gear to actuate an embroidery frame, jacquard operated mechanism for selectively oscillating the planet wheel carriers in one or other direction, comprising two sets of slidable jacks having differently-located butts thereon, a jacquard card mechanism operating said jacks selectively, a three-armed lever, an oscillating lever carrying said three-armed lever, feeler. bars on two arms of said lever adapted on the oscillation of the carrying lever to co-operate with the butts on said jacks which have not been operated by the jacquard mechanism, an actuating rod for said carrying lever, said actuating rod hav ing an elongated slot therein, a pin on the free end of the carrying lever engaging in the elongated slot, a spring holding said pin at one end of said slot. a Bowden core wire fixed near the free end of the carrying lever and a Bowden cable fixed to the actuati'ng rod for said carrying lever.

6. In a lace machine wherein the motions,

of needles actuated by jacquard card mecl1- anism are transmitted to planet wheel car riers co-acting with planet gear to actuate an embroidery frame, jacquard-operated mechanism for selectively oscillating the planet wheel carriers in one or other direction, comprising two sets of slidable jacks having dilferently located butts thereon, a jacquard card mechanism operating said jacks selectively, a three-armed lever, an oscillating lever carrying said three-armed lever, feeler bars on two arms of said lever adapted in the oscillation of the carrying lever to c o-operate with the butts on said jacks which have not been operated by the jacquard mechanism, an actuating rod for said carrying lever, said actuating rod having an elongated slot therein, a pin on the free end of the carrying lever engaging in the elongated slot, and machine-stopping mechanism operated by a movement of the said pin along the elongated slot.

MAX HADAM.

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