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Traffic signal controller

  • US 3,271,734 A
  • Filed: 03/16/1964
  • Issued: 09/06/1966
  • Est. Priority Date: 03/16/1964
  • Status: Expired due to Term
First Claim
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1. IN A TRAFFIC SIGNAL CONTROLLER FOR CONTROLLING TRAFFIC SIGNALS AT AN INTERSECTION BETWEEN STREETS, SAID SIGNALS INCLUDING A SET OF SIGNAL LIGHTS FOR EACH SUCH STREET, A POWER SOURCE, PRE-TIMED CONTROL MEANS FOR PROVIDING CONTROL SIGNALS FOR SAID LIGHTS IN ACCORDANCE WITH A PREDETERMINED PROGRAM, SEMI-ACTUATED CONTROL MEANS FOR PROVIDING CONTROL SIGNALS FOR SAID LIGHTS IN ACCORDANCE WITH TRAFFIC CONDITIONS ON ONE OF SAID STREETS, SEQUENCING AND SWITCHING MEANS INTERPOSED BETWEEN SAID POWER SOURCE AND SAID SIGNAL LIGHTS AND SAID POWER SOURCE AND SAID SEMI-ACTUATED CONTROL MEANS FOR CONNECTING POWER TO SAID LIGHTS AND TO SAID SEMIACTUATED CONTROL MEANS IN A PREDETERMINED SEQUENCE, ACTUATOR MEANS RESPONSIVE CONNECTED TO SAID PRE-TIMED FOR ACTUATING SAID SEQUENCING AND SWITCHING MEANS, AND MEANS FOR ALTERNATIVELY CONNECTING SAID POWER SOURCE EITHER DIRECTLY TO SAID PRE-TIMED CONTROL MEANS TO CAUSE SAID PRE-TIMED CONTROL MEANS TO DRIVE SAID ACTUATOR MEANS IN ACCORDANCE WITH SAID PREDETERMINED PROGRAM OR CONNECTING SAID PRE-TIMED CONTROL MEANS

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