Recognition and identification key having adaptable resonant fre

Details Recognition and identification key having adaptable resonant fre Recognition and identification key having adaptable resonant fre

1977-01-17

1979-03-06

Canney, Vincent P.

Registers

Records

Conductive

70277, 235487, G07F 106, G06K 700

Patent

active

041426746

ABSTRACT:
A recognition and identification key comprising a substrate formed from an electrically insulating material, a first sheet of conductive material formed on a first surface of the substrate in a looping pattern so as to provide an inductive element, and a capacitive element coupled to the first sheet such that the elements are resonant at a first frequency, at least one of the inductive and capacitive elements capable of being changed such that the key is resonant at a second frequency, and a method of adapting the resonant frequency.

REFERENCES:
patent: 3134254 (1964-05-01), Richard
patent: 3397393 (1968-08-01), Palmateer et al.
patent: 3530281 (1970-09-01), Smeiman
patent: 3702464 (1972-11-01), Castrucci

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