Patent GB-190500541-A (GB)
Title: Improvements in or relating to Machines or Apparatus for Twisting-in New Warps
Inventor: ZAPPERT ERNST
Filed: 1905-01-11
Granted: 1905-06-15
Abstract: 541. Zappert, E., [Warp Twisting-in Machine Co.]. Jan. 11. Warp threads, uniting. - Relates to apparatus for twisting-in warps, in the loom or otherwise, and consists in improvements o the e invention described i n Specifications Nos. 4333 and 14,111, A.D. 1900, and No. 9495, A.D. 1901. The old and new warps are arranged with their ends in clamps on the outer sides of spring- pressed sliding carriages, which are held back by a latch during the operation, the warps first passing over and above leaserods &e. m<10>, m<8>, Fig. 57, and extending over rods t<1>, s<5>, Fig. 1, then under a fork l<4> and up, through the latter, to the clamps. They are kept crossed by hook-bars n<4> &c., and, on the rotation of the band-wheel j, are fed by separating-devices including spirals a', a<2>, w, between a rubber-covered adjustable stationary member and a rotating twisting-member, by which a warp from the old set is twisted round a warp from the new set. The ends are cut off, and the united warps are delivered by a spiral n<2>, which prevents entanglement of successive warps. The main shaft e is driven by bevel-gearing from a shaft h driven by a clutch from the drive-wheel j. A stop-motion device is described, by which the clutch is broken if one of the two successive warps to be twisted together is absent. Arrangements are also described for grinding the rubber surfaces of the pads of the members of the twisting- mechanism. The apparatus is clamped to a carriage f<7>, Fig. 57, partly supported by a rod e<10>, Fig. 66, and partly by a lug g<6> carrying a roller bearing against one of the tie-rods of a frame d', the apparatus being secured in position by turning a spring-pressed cam g<10>, Fig. 66, which presses up a roller h<9> and clamps the carriage. The latter, when unclamped, is moved along, as the warps are successively twisted together, by adjustable ratchet mechanism i<9>, i<10> and crank and worm gearing j<8>, j<6>, by which the shaft of the wheel f<6> is rotated, when the wheel j<3> is rotated. The two carriages v<4> have re-bent portions sliding on four guide-ways formed by two horizontal and two vertical slots on an adjustable bracket t<2> carried by a vertically-reciprocated rod s<2>, the re-bent portions being provided with rollers. Springs v<3> fastened to an adjustable block w<2> bear against lugs on the carriages, which are lined on the outer surfaces with rubber pads. Between these and corresponding pads on clips which are hinged to the carriages and are provided with latch fastenings, the two sets of warps are clamped. Lugs limit the movement of the carriages, which may be moved by handles. A bar y<3>, against which the threads abut, permits the carriages to advance only so fast as the portions of the vertical thread are successively twisted together and cut off. The threads are separated one at a time by four bars n' provided with loose pinions o<1>, Fig. 6, geared together by a gear p<2>, one of the pinions being driven from a gear r which is driven from a starwheel, intermittently rotated by a pin-wheel. A carriage q<5>, Fig. 1, reciprocated by a cam-groove m and penetrated by, and sliding on, a guide, has a winged ratchet-plate fitting peripheral channels in the hook-bars, thus reciprocating the latter horizontally. At the same time, spring-pressed members o<2>, Fig. 6, provided with keys sliding in grooves in the bars n<4>, and having projections o<3> fitting in notches o<4> in the pinions o<1>, cause the hooks to make half a revolution at each reciprocation. A frame is provided with a curved slot in which a roller on a disk fits and reciprocates the frame, the latter carrying the rod s<2> and also, at its bifurcated lower end, two horizontal rods s<5>, Fig. 1. By means of the latter, in conjunction with a stationary fork, stationary rods t<1>, and hook-bars n<4> &c., entanglements of threads are broken. The warps are, by the aid of a hook k<3> on a rock-shaft j<4> which is oscillated by lever and crank mechanism, fed in pairs to the rotating spirals a<1>, a', w, by which they are kept separated, finally being guided into a concentrator f<4>, Fig. 26, and into the twisting-mechanism. The stationary member c<2>, Figs. 17 and 26, of the latter carries a segmental section c<3>. Headed projections or studs on an arcuate metal pad c<4> covered with rubber fit, and are kept by spring action in, slots in the edges of the section c<3>, and are forced against their closed ends during the wiping action. The pad c<4> may thus be detached when desired. The rotary member d<5>, e<1>, e', Fig. 26, driven by gearing i<5> &c., Fig. 1, is somewhat similar, the shaft d<5> being prevented from longitudinal displacement by the gear i<5> and hub j<2> of a disk abutting against the upright i. The pad e' is cushioned on the segment d<4> by spring action. The shaft a<3> carrying the stationary member of the twisting-mechanism is pressed outwards by a spring acting on a collar, and is delicately adjusted by turning a screw on a forked arm secured by a pin to the rear of the shaft. The parts may be locked by a set-screw. The threads are cut by a knife f<5>, Fig. 26, on an arm g<4> on a spindle g<5> oscillated by a cam h<3> acting on the toe h<2>. The spindle is returned by a spring. In a modified thread cutter, the concentrator has a re-bend receiving cutters consisting of a spring-pressed stationary disk i<1>, Fig. 41, and a rotating cutter i<2> having a cutting-edge i<3>, the threads entering the notch formed between the cutting-edge i<3> and disk i<1> being cut by a scissors-like action. A shaft k<5>, Fig. 17, in a sleeve in the upright b, Fig. 1, is longitudinally reciprocated by the cam-groove m acting on an arm l<1>, a fixed stud fitting through, and preventing rotation of, the latter. The shaft k<5> carries a fork l<4>, Figs. 1 and 17, having elastic wire thread-holders l<5> bent upwards and adapted to hold the threads freely and accurately and to release them quickly at the required time. After being united, the threads are forced out and kept separated by a spiral n' on a shaft m<5>, Fig. 17, driven by bevel-gearing from the spindle d<5>. In the stop-motion mechanism, arms y<5>, Fig. 9, on a bracket are first opened and then the warps are passed between them. When both threads are intact, fingers z<1> are moved outwards on the outward movement of the carriage and rods n <4> &c., and by lever mechanism y<6>, z<6>, a<6>, two levers b<6> are moved out of the path of an arm b<9> on a rock-shaft b<8> carrying an arm b<10>, Fig. 16. If one or both threads are broken, the corresponding lever or levers b<6> come in contact with the arm b<9>. The arm b<10> is thus rocked out of contact with the ball c<6> in a notch in the handle sleeve j, the clutch coupling being disengaged and the shaft h no longer rotating with the sleeve. When the carriage moves back, a spring-actuated pawl c<10>, Fig. 1, having a laterally-projecting arm, moves into the path of a lug a<7> carried by each link a<6>, and carries back the latter, a lug d<8> finally depressing the arm out of engagement with the lugs a<7>. To grind the rubber faces of the two pads, they are placed between a plate p<7>, Fig. 63, on a bracket p<6> on the framework k<8>, Fig. 57, and a disk p<8> having an abrading-face p<9>. The plate p<7> is provided with orifices for the studs on the pads, a plate spring q<7> on the shank q<8> abutting against the heads of the studs, and being held there by a spring-actuated lever q<9>. The reed l<8>, Fig. 57, is suspended by cords from an adjustable rod k<10> on an adjustable rod k<9>, which carries rods l<6> supporting clamps for the upper shafts of the harness, and books to hold a lease-rod m<8>. A- lease-rod m<10> is also carried by the bracket n<6>. The new warp roller d<12> is supported by a toothed bracket n<9> provided with bolding-pawls n<10> and adjusted by a lever o<6>. One of the brackets n<9> may be guided directly on the frame d<9>, the other being arranged in a casting on tubular braces of the frame d<9> and having a roller bearing against the upper tubular brace, against which it is held by the tension means for the warp roll. The spirals a<1>, a<2>, &c., Fig. 1, are carried by an extension shaft v, pivotally mounted on a shaft t driven from the shaft e. A sleeve z keeps the shafts v, t alined. The spiral w is adapted to be folded around out of the way, and is then supported by a rigid arm x. The hook-bars n<4> are provided with milled shoulders n<5>, whereby they may be manually adjusted rotatably. In a modification, one hook-bar n<4> in each pair is dispensed with, and fixed rods are used instead.