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Electrical transmission path for electrical and electro-mechanical locks

  • US 5,791,178 A
  • Filed: 12/26/1995
  • Issued: 08/11/1998
  • Est. Priority Date: 12/26/1995
  • Status: Expired due to Term
First Claim
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1. A door lock operable by either a mechanical key or an electronic touch key, said door lock having an electronic control for an electrical lock operating system, an outside spindle operably engaged with a door handle containing an insulated key cylinder having an electronic touch target for a front face, a contact pin supported by and extending axially from said insulated key cylinder, and apparatus providing an electrical transmission path from said contact pin to said electronic control, said apparatus comprising:

  • a stationary insulated contact ring surrounding said spindle and having an electrically conductive pad on a portion of an outwardly facing surface, said contact ring being contacted by said electrical contact pin when the door handle is in its parked position; and

    a cable connected to the conductive pad and extending through a non-moving part of the door lock to the electronic control of the lock.

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