Patent GB-746025-A (GB)
Title: New or improved remote control toy
IPC: A63H19/12
Filed: 1952-05-07
Abstract: 746,025. Inductive control of apparatus. KAISER, H. May 7, 1952, No. 11486/52. Class 40 (5). [Also in Group XV] Toy vehicles are operated by remote control effected by a transmitter including one or more turns of wire 1 looped to enclose an area within which vehicles I, II travel, each vehicle containing control means actuated by a receiver which is responsive to a magnetic field produced by current controlled by switches A, B; the control means may include driving and/or steering mechanisms. In Fig. 2 a receiver of a vehicle comprises an antenna 32 of ferromagnetic material having a pivoted bridge part 33 which is normally urged by a spring 35 to the position shown. A motor 39 drives a wheel on one side of the vehicle and a motoi 40 drives the corresponding wheel on the opposite side of the vehicle which is steered by controlling the speed of one or other of the motors. As shown, a resistance W1 in series with the current supply from a battery 41 to the motor 39 is shorted out, the motor 39 therefore running faster than motor 40. Upon the antenna 32 being influenced by a magnetic field produced by the current in the looped wire 1, Fig. 1, the pivoted part 33 turns anticlockwise so as to break contact at 37 and make contact at 38, the motor 40 now running faster than motor 39. In Fig. 9, the pivoted antenna part of receiver C is responsive to a magnetic field in the opposite sense to that which causes the pivoted antenna part of receiver D to turn from its normal position, and current impulses of the requited direction to produce these fields are obtained by operation of double-pole change-over switches A, B, which are of the press-button type. As shown, a condenser 25 is charged from an alternating current supply via a rectifier 18, but actuation of the switch A to the position indicated in dotted lines causes the condenser 25 to discharge through the looped wire 1; when switch B is operated, a charged condenser 26 causes a momentary current flow in the opposite direction to that produced by condenser 25. In Fig. 11 (not shown), a change-over switch for controlling the direction of current in the looped wire 1 is actuated by a wheel, and the receiving antenna is provided with a polarizing permanent magnet. Current supply for the looped wire may be controlled via a switch in which an arm makes contact with a number of contacts in turn, Fig. 8, (not shown). In Fig. 7 (not shown), a relay controlled rotary switch enables a number of different switching operations to be obtained. Fig. 5 shows a toy vehicle propelled by a mechanism 71 which may be clockwork, a wheel 77 being rotatable for steering by spring and gear means 74, 75 controlled by a stirrup 76 which is able to make one turn for each operation of the antenna part 33. A 1: 8 reduction gear between the stirrup spindle and the steering spindle of the wheel 77 results in # of a turn by the wheel 77 for each operation by the part 33. Hence with a cycle of four impulses the wheel 77 may be turned through 180 degrees for control of the vehicle steering. Permanent magnets may be provided in the shapes of trees, stones, houses, &c., as additional magnetic control means for the vehicles.