Radio controlled, battery-operated model toy

Claim 1

A radio controlled, battery-operated model toy, comprising a radio controlled receiver, an electric motor, a battery device for supplying energy to the motor through an electric supply circuit, a servo-mechanism coupled to and operated by the output from the radio controlled receiver, a voltage responsive automatic circuit breaker connected between the battery device and the electric motor which opens the electric supply circuit of the electric motor in response to a voltage drop of the battery device and maintains the circuit in an open state, and a voltage regulator/noise filter connected between the battery device and the radio controlled receiver, the voltage regulator/noise filter comprising a filter circuit consisting of at least one diode and a capacitor, said diode series-connected between the battery device and the capacitor, and a voltage regulating circuit connected in parallel with the capacitor, and wherein said at least one diode is connected in the forward direction between the positive terminal of the battery device and the capacitor to prevent discharge of the capacitor upon a voltage drop of the battery, and further comprising a detecting transistor which detects the output voltage of the voltage regulating circuit and whose base current is controlled by the detected output voltage, and wherein the voltage regulating circuit comprises a current controlling transistor which is connected between the diode and the radio controlled receiver and whose base current is controlled by the detecting transistor, whereby the output voltage is maintained at a predetermined level despite voltage fluctuations and pulse-like noise from the battery device, and wherein a current limiter is provided in series between the battery device and the electric motor to supply current to the electric motor by shunting the supply current from the battery device to the electric motor when the voltage responsive automatic circuit breaker operates.