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Emergency traffic control system with security transmission coding

  • US 4,016,532 A
  • Filed: 11/05/1975
  • Issued: 04/05/1977
  • Est. Priority Date: 11/05/1975
  • Status: Expired due to Term
First Claim
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1. An emergency system for remotely controlling the light latches associated with traffic signal lights comprising:

  • a. a remotely located transmitter means including;

    i. first and second RF oscillators,ii. means for transmitting the signals generated by said oscillators,iii. means for generating a binary code,iv. logic means for gating the output of said first or second oscillator to said transmitting means according to said code thereby to transmit a binary coded RF signal;

    b. means for receiving the binary coded RF signals including;

    i. first means for comparing said coded signal and producing an output indicative of a match,ii. means responsive to the output from said first comparison means for enabling a first signal light latch.

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