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Detection response mechanism

  • US 3,231,880 A
  • Filed: 06/18/1962
  • Issued: 01/25/1966
  • Est. Priority Date: 06/18/1962
  • Status: Expired due to Term
First Claim
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1. ELECTRICAL MEANS FOR DETECTING OCCUPANT'"'"''"'"'S FINGERS AND THE LIKE IN A DOOR JAMB OF A HINGED DOOR AND A RESPONSE MECHANISM CAPABLE OF PREVENTING SAID HINGED DOOR FROM FULLY CLOSING, SAID ELECTRICAL MEANS BEING PARTICULARLY SUITED FOR EASY APPLICATION TO SAID DOOR JAMB AND COMPRISING A TAPE HAVING A LAYER OF ADHESIVE SECURED TO ITS BACKSIDE FOR AFFIXING SAID TAPE TO SAID JAMB OF SAID DOOR, AND A PLURALITY OF EXPOSED CONDUCTIVE STRIPS SECURED TO ITS FACE SIDE, A CAPACITANCE CHANGE DETECTING CIRCUIT WITH INPUT TERMINALS, AND MEANS FOR CONNECTING THE EXPOSED STRIPS OF SAID TAPE TO SAID INPUT TERMINALS, AND SAID RESPONSE MECHANISM COMPRISING A SOLENOID WHICH OPERATES TO MECHANICALLY BLOCK SAID HINGED DOOR AGAINST CLOSING, SAID SOLENOID BEING IN CIRCUIT WITH SAID ELECTRICAL MEANS.

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