Patent GB-220058-A (GB)
Title: Improvements in or relating to electrical or other coils and to winding machines therefor
IPC: H01F41/06
Filed: 1923-05-07
Abstract: 220,058. Wade, H., (Universal Winding Co.). May 7, 1923. Variable-speed ratchet gearing for intermittently moving the guide-carriage of a machine for winding electrical and other coils so that the individual turns are disposed in planes normal to the axis of the coil and are connected to each other by a portion lying at an abrupt angle to such planes as shown in Fig. 15. The length of the movement of the carriage is adjustable by means giving a comparatively coarse and a fine adjustment in accordance with the diameter of the material being wound. A track 82, Fig. 6, in a disc V, mounted on the spindles which carries the core or former, operates a lever 80 mounted in an adjustable pivot-slide 91 and connected to a shoe 84, which is coupled to two arms 86, 87 provided with pawls 88, 89, so as to actuate a frictionally controlled ratchet wheel 90 on a shaft O<1>, connected by clutch and change-speed mechanism with a screw-shaft 0, which actuates the guidecarriage L. Means is provided to withhold both pawls during the winding of each turn and to cause one or the other to engage with the ratchet wheel, according to the direction in which the traverse is proceeding, at the conclusion of the winding of each turn. The coarse adjustment of the movement of the carriage L is provided by altering the position of the pivot slide 91 by a screw 96, and the fine adjustment by altering the connection between a nut on the screw and the carriage L. The cam-track 82 is so shaped as to give the slide a quick movement to effect the operative movement of the ratchet pawls which are carried on pivot pins 134 provided with cam-arms 133. Auxiliary levers 132, pivoted on the arms 86, 87, are connected to the slide and operate the cam-arm so that the pawls are lifted clear of the ratchet-wheel during the return stroke. The pawls are lifted' by the auxiliary levers before movement is imparted to the arms 86, 87, and the reverse action is effected upon engagement. According as the traverse is moving to the right or left one or the other of the pawls is held inoperative by a disc 148 operated by a fork 159 connected to a slidable bar 164, the movement of which is controlled by the carriage L. The bar 164 is moved by pawls which are operated by a lever 232 and cam Y on the spindle S but are normally withheld from the bar by two stop levers on an auxiliary bar, When the carriage L is at the end of its traverse a stop thereon moves the auxiliary bar so as to bring one or the other of the stop levers within range of fingers 221 on the shaft O, whereupon one of the pawls is released and the bar 164 and the disc 148 moved to disconnect the operative pawl of the ratchet gear and engage the other, when then reverses the shaft 0. The movement of the bar 164 is assisted by a spring and wedge shaped pawl which rides over a V-tooth on the bar. The disc 148 may be operated by hand, but, in order to preserve the synchronism of the movements of the spindle and screw, a lever 250 is engaged by the periphery of the cam V so as to project its toe-piece 256 in the path of the disc 148 and prevent such movement while either of the ratchet pawls are operative.