Patent GB-284192-A (GB)
Title: Improvements in devices for separating and supplying threads particularly to warp-heddling machines
IPC: D03J1/14
Filed: 1928-01-23
Abstract: 284,192. Zellweger Akt.-Ges. Jan. 21 1927, [Convention date]. Healds &c., threading.-A device for separating and feeding threads particularly for heald-threading machines of the kind described in Specification 245,530 comprises a thread remover arranged between thread separating spindles and adapted to transport threads singly past stops for the row of threads on the spindles and present them to a thread feeder. The thread feeder, in turn, moves the threads into position to be acted upon by a thread layer which places the threads in position to be received in the hook of the heald-threading needle. Thread-separating devices. The ends of the threads are held in a clamp arranged above the device which is carried by a plate 3, Fig. 1, movable along a rail 1. Rotating thread-separating spindles 7, 8 having right and left hand separating worms 7<1>, 8<1> are formed in hollow to receive the usual cords 10, 11, Fig. 2<a>, which are passed between the threads to divide them into two groups I, II. The spindles have stops 7<11>, 8<11> for the row of threads, the end thread of the row being released as the spindles rotate in opposite directions. Thread remover. The thread released bv the stops 7<11>, 8<11> is engaged by a bunch of bristles 14<11> carried in the end of the lever 14 which is moved towards the threads and then to the left, thus moving the released thread past and between a cam-operated stop 15 and a fixed stop 23. A cam-operated gripping device 39 prevents the threads from being withdrawn from the clamp by the action of the remover 14<11>. Stop-motion acting on failure of thread remover. When the thread C is placed between the stops 15, 23, it passes in front of members 34 and behind a spring-controlled finger 31 on a camoperated lever 26, which then moves towards the members 34. If no thread is present, the finger is not turned against the action of its spring and an electric circuit is completed to stop the machine. Carriage traversing device. The threads entering the gripping device 39 engage a spring- controlled lever 40. When the threads have been sufficiently removed and dealt with by the heddling machine, the lever 40 is allowed to turn and complete a circuit to operate an Electromagnetic ratchet to cause the carriage 3 to be advanced. Thread feeder. The separated thread C is engaged by a rotating thread feeder 47 having cam-opened spring-closed jaws for seizing the thread and withdrawing it from the clamping device, a cam-operated finger 56<1> moving the other part of the thread out of the way. In a modification, the thread is not withdrawn from the clamp at the upper part of the machine, but is severed by a cutting-device into which it is guided by a helical guide, Fig. 17 (not shown). Thread layer. The thread feeder 47, Figs. 1 and 10, moves the separated thread C over a sheet metal guide 58 and past a part 61 into an eyelet 60. The thread is then released from the jaws of the feeder and is in position to be engaged by the thread layer. The layer comprises a rotating forked member 66 and a buffer member 73 having a spring-controlled lever 74. The thread is first engaged by the lever 74 and subsequently by the member 66, lever 73 then returning to its initial position. Controlling the heald-threading needle. The thread layer places the thread in position to be received by the hook of the needle 51 for threading the heald B which has been separated by the heald-separating apparatus A. The needle is then withdrawn through the eye of the heald B which is thus threaded. The needle is then moved laterally in its carrying device 79 and forwardly through the eye of the next heald to be threaded. It is then again moved in position to receive another thread from the thread layer. During its movement beneath the thread layer, the needle is guided by the forked end of a lever 85 which is mounted on a rocking lever 87 and engaged by a cam-operated bell-crank lever 97, the fork rising to receive the needle and moving it laterally together with the selected heald before each threading operation.