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Automatic radio warning system

  • US 3,102,235 A
  • Filed: 10/02/1961
  • Issued: 08/27/1963
  • Est. Priority Date: 10/02/1961
  • Status: Expired due to Term
First Claim
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1. IN A CONDITION-RESPONSIVE SIGNALLING SYSTEM, A RADIO TRANSMITTER LINK AND A NORMALLY OPEN POWER SUPPLY CIRCUIT THEREFOR, A CONDITION SENSOR INCLUDING A PAIR OF CONTACTS, AND TONE SIGNAL GENERATOR MEANS FOR MODULATING THE TRANSMITTER, SAID GENERATOR MEANS INCLUDING FIRST AND SECOND ALTERNATIVELY CLOSABLE TONE CONTROL CIRCUITS AND AN IDENTIFIABLE TONE PRODUCING DEVICE IN AT LEAST THE FIRST OF SAID TONE CONTROL CIRCUITS, A TONE CONTROL RELAY ACTUATABLE BETWEEN FIRST AND SECOND STATES FOR ALTERNATIVELY CLOSING SAID FIRST AND SECOND TONE CONTROL CIRCUITS UPON ENERGIZATION AND DE-ENERGIAZTION OF A WINDING THEREOF, A MASTER RELAY INCLUDING A WINDING, RELAY POWER SUPPLY CIRCUIT MEANS, A CYCLE-INITIATING CIRCUIT CONNECTING SAID SENSOR AND THE MASTER RELAY FOR CLOSING THE RELAY POWER SUPPLY CIRCUIT MEANS THROUGH THE MASTER RELAY WINDING UPON CLOSURE OF THE SENSOR CONTACTS WHEREBY TO ENERGIZE THE WINDING OF THE MASTER RELAY AND CLOSE THE SAME, CONTACT MEANS ON SAID

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