GB618598A - Improvement in ring winding machines - Google Patents

Abstract

618,598. Winding toroidal coils. JACK & HEINTZ, Inc. March 6, 1946, No. 6971. Convention date, March 30, 1945. [Class 83 (iv)] A motor-driven ring-winding machine comprises a rotatable turntable 39 for supporting the ring 46 to be wound, a concentric split gear 52 disposed at right angles to the ring and having secured thereto a spool carrier 54 including a wire-feeding spool 63 and a guidewheel 56 in spaced relationship on either side of the ring rim, and a motor-driven gear train for rotating the turntable and for rotating the split-gear device carrying spool about the rotating ring to wind the wire thereabout in a single continuous contiguous winding, the gear train including a gear in driving relationship with the turntable and a manually adjustable friction drive means between the turntable and the turntable gear for varying the speed ratio drive therebetween. The gear train for the split gear comprises a driving gear 2, a pair of driven gears 3, 5, meshing with the split gear 52 so that one of the gears 3, 5 is always in mesh therewith; and for the turntable comprises the driving gear 2, driven gear 5, a worm 7 meshing with a gear 8, a worm 31, Fig. 3, meshing with the turntable gear 32, the shafts 17 and 9 of the worm 31 and the gear 8 respectively being in alignment and carrying therebetween a pair of wheels 16, 15 of the adjustable variable-speed friction drive, wheel 16 being fast to shaft 17 and loose to shaft 9 and the wheel 15 being fast to shaft 9. Between the wheels 16, 15 is a friction disc 24 pinned through a shaft 27 to a bracket 66 which latter is clamped to the casing through an arcuate slot which allows of its adjustment and therefore of the friction disc. Between the turntable gear 32 and the turntable 39 is a frictional drive adjustment comprising a friction disc 35, a loosely mounted collar 37 all held in position by an adjustable nut 41 and a compression coil spring 42. The speed of rotation of the turntable is therefore dependent on this adjustment, together with the adjustment of the variablespeed friction-drive 16-15. These adjustments allow the speeds of rotation of the ring 46 and of the gear 52 to be so correlated that there will be no overlapping of wire and no space between each turn of wire on the ring. The machine may be used for the wire winding of electrical devices, such as potentiometers.