Patent GB-191111443-A (GB)
Title: Improvements in or relating to Machines for Threading Detached Loom Elements.
Inventor: HATHAWAY EDGAR FAY
IPC: D03J1/14
Filed: 1911-05-11
Granted: 1911-10-12
Abstract: 11,443. Hathaway, E. F., and Lea, C. May 12, 1910, [Convention date]. Healds, warp-stop detectors, and reeds, threading.-In drawing-in machines of the kind 'described in Specifications 6348/98 and 961/07 in which the reed, healds, drop-wires or detectors, and the warps are supported in a substantially parallel arrangement along the machine and a needle upon a travelling carriage effects the threading, the drop-wires when .arranged in compact' series before they are released and threaded are supported by one or more members mounted on the travelling carriage, and are merely guided by the usual fixed bars. Drop-wires a, a', which may be of the form shown in Fig. 18, are threaded alternately on a bar 6 Fig. 6, which is supported with its ends in.vertical slots in adjustable fixed brackets. The releasing-rod 14, which is mounted on the needle carriage and has a helical key-piece 13 at its end, passes through key-hole slots 15, 16 in the drop-wires and supports all or part of the drop-wires, the slots 15, 16 being so positioned that alternate drop-wires project below the others and may be supported by an auxiliary supporting-bar 17, which may be adjustable vertically to suit dropwires of different lengths. In the case of long drop-wires, the fixed guiding-bar 6 may be adjusted to support alternate drop-wires. In some cases, a roller may be adjustably mounted to raise the foremost drop-wires slightly and free them from any binding action of the releasing-rod 14 and the key 13. As the rod 14 rotates, the key 13 engages the slots 15, 16 in succession and moves a drop-wire from the series during each semi-revolution and into position for its lower unslotted end to be engaged by a worm 42, Fig. 21, on a shaft 43 rotating at twice the speed of the rod 14. When released from the rod 14, the drop-wire is supported by the fixed bar 6, and a recess 48 in' the worm is so shaped as to act upon the end of the drop-wire and turn part of it to face the needle 2, the drop-wire being held firmly between the worm and a standard on the carriage and prevented from lateral movement by flanges 45, 46 on the worm. The threading is then effected, and the drop-wire is freed from the worm and hangs on the bar 6. Before the threading, the series of drop-wires are held compactly pressed together by followers 31, Fig. 6, slidably mounted by rods 32 and sleeves 33 on a carriage 22, which runs on rollers 23 on an horizontal bar 24 of the needle carriage. The carriage 22 is pulled towards the dropwires by a chain 29, which passes round a pulley 30 and has its end connected, to a strap which is wound on a drum by the action of a spiral spring, the arrangement being such that, 'as the number of unthreaded drop-wires diminishes, the power of the spring also diminishes. The sleeves 33 are formed with racks engaged by a pinion between them, so that the pressure of the followers on two parallel series or banks of drop-wires is automatically equalized. The rods 6 pass through slots in the carriage 22 and are supported by a roller 38 on a bracket 37 adjustably secured to the carriage. The releasing-rod 14 and the wormshafts 43 are driven through spur-wheel gearing from a shaft rotated under control of the usual pattern mechanism. Change gear is provided to adapt the speed of rotation of the shafts for threading drop-wires arranged in one series or two parallel series, the change gear comprising a slidable sleeve carrying two spur-wheels and adapted to be locked in either of two positions by a spring-pressed pin engaging grooves therein. The guiding and the supporting bars may be arranged to suit various lengths and constructions of drop-wires, and the invention may be applied to the threading of metallic healds.