Locking system especially for automobiles

  • US 5,841,363 A
  • Filed: 03/29/1996
  • Issued: 11/24/1998
  • Est. Priority Date: 10/01/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. A locking system for an automobile, comprising:

  • an operating key;

    an operating key receptacle;

    an operating unit associated with the operating key receptacle;

    a light guide in the operating key receptacle; and

    electro-optical converter elements, including luminous elements and photocells arranged in the operating key and in the operating key receptacle, optically coupled to the light guide, for transmitting an optical energy signal through the light guide from the operating key receptacle to the operating key for supplying energy for operation of the operating key, and for transmitting coded operating signals through the light guide, including a second operating signal transmitted from the operating key receptacle to the operating key and a first operating signal transmitted from the operating key to the operating key receptacle, wherein the second operating signal operates jointly with the first operating signal in a bidirectional communication to constitute an alternating code for activation of the operating unit upon a successful decoding of the two transmitted operating signals.

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