Identification device

Details Identification device Identification device

1977-11-02

1979-03-06

Wolfe, Robert L.

Locks

Operating mechanism

Using a powered device

E05B 4900

Patent

active

041423879

ABSTRACT:
A device for identifying a coded key or the like. A coded key member is inserted into a housing. A Moire interference pattern is produced by a first screen positioned on the key to be moved into registry with a second screen mounted in the housing. The first screen forms non-readable coded information and the second screen forms a code-key. Decoded information produced by the Moire interference pattern is opto-electrically read and a corresponding electrical signal is generated.

REFERENCES:
patent: 3733862 (1973-05-01), Killmeyer
patent: 3797936 (1974-03-01), Dimitriadis

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