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Device for the contactless coupling of the control and output currents between the electronic elements on the locking cylinder and the electronic elements in the key of an electro/mechanical locking device

  • US 4,663,952 A
  • Filed: 01/14/1986
  • Issued: 05/12/1987
  • Est. Priority Date: 01/18/1985
  • Status: Expired due to Fees
First Claim
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1. A device for the contactless coupling of the control and output currents between the electronic elements on the locking cylinder and the electronic elements in the key, which is provided with a handle, of an electro/mechanical locking device, comprising a multiple coupler consisting of a first part integrated in the key handle and a second part disposed on the periphery of the locking cylinder, said first and second parts being disposed so that when the key is inserted in the locking cylinder said first and second parts oppose each other so that a contactless electrical coupling of the control and output currents occurs between the electronic elements on the locking cylinder and the electronic elements in the key, wherein the first part of said multiple coupler is comprised of a ferrite rod having a center bore and a coil, said ferrite rod having a passive or active opto-electronic element disposed in its center bore, and the second part of the multiple coupler on the locking cylinder is comprised of a ferrite body having a center bore and a coil and an active or passive opto-electronic element disposed in its center bore, so that when the key is inserted, only a narrow air gap is formed at at least one point between the ferrite elements.

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