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Remote control system for electric apparatus

  • US 3,944,982 A
  • Filed: 08/06/1974
  • Issued: 03/16/1976
  • Est. Priority Date: 08/16/1973
  • Status: Expired due to Term
First Claim
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1. A remote control system wherein plural functions of electric apparatus are selectively controlled in accordance with a received command signal having a single frequency and repetitive transmission periods, the duration of a transmission period being determinative of a particular function, comprising:

  • receiving means for receiving said command signal;

    detecting means coupled to said receiving means for producing pulses having durations corresponding to the durations of the received transmission periods of said received command signal;

    measuring means coupled to said detecting means for measuring the duration of each produced pulse and for selectively producing one of a plurality of output pulses in accordance with the measured duration of said produced pulse;

    counter means coupled to said measuring means for counting the consecutive number of each of said output pulses produced by said measuring means to thereby provide a count of the number of consecutive repetitions of transmission periods having the same duration which are received by said receiving means; and

    control signal generating means coupled to said counter means for generating one of a plurality of control signals depending upon the output pulses produced by said measuring means and only if said counter means counts at least a predetermined number of said output pulse representing that at least said predetermined number of consecutive repetitions of a command signal having a selected transmission period has been received, said generated control signal being adpated to control a selected function.

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