Multiple-function remote control system

Claim 1

A wireless multiple-function remote control system utilizing an FM transmitter and receiver for selectively actuating any desired one of a plurality of control devices respectively assigned to perform a corresponding plurality of control functions, comprising: an oscillator for generating a series of timing pulses with a predetermined repetition rate; a shift register, coupled to said pulse-generating means, having a plurality of output circuits, and responsive to said timing pulses for producing different output pulse signals at said respective output circuits; a first diode logic network coupled to said output circuits for producing digital signals consisting of predetermined combination code groups of said output pulses, each said group corresponding to one of said control functions; switch means coupled to said first diode logic network for selecting any desired one of said code groups; means for combining said timing pulses with said selected code group to produce a control signal therefrom; an electronic counter coupled to said shift register for developing a reference signal indicative of the duration of the counting cycle of said shift register; a gating circuit coupled to said counter and responsive to said reference signal for coupling said selected code group to said combining means; a frequency-modulated carrier wave oscillator responsive to said control signal for developing and transmitting to said receiver a carrier wave signal frequency modulated by said control signal; input circuit means including a transducer for receiving said frequency-modulated carrier wave signal and recovering said control signal therefrom; means coupled to said input circuit means and responsive to said control signal for reconstructing said series of timing pulses; a differential amplifier coupled to said input circuit and responsive to said control signal for developing a logic signal; a second shift register conjointly responsive to said reconstructed timing pulses and said logic signal for temporarily storing a digital signal representative of said selected code group; a second diode logic network coupled to said shift register for deciphering said stored digital signal and generating an appropriate actuating signal for application to the control device corresponding to the desired control function; means coupled to said reconstructing means and responsive to said reconstructed timing pulses for developing a control effect indicative of the presence of a control signal; a second electronic counter, coupled to said second shift register, conjointly responsive to said control effect and said stored digital signal for developing a second reference signal indicative of the duration of the counting cycle of said second shift register; pulse counter means responsive to said reconstructed timing pulses for developing a triggering signal upon counting a predetermined number of timing pulses to enable application of said actuating signal to said control device; and an electronic gating circuit coupled to said reconstructing means and responsive to said second reference signal for coupling said reconstructed timing pulses to said pulse counter means.