Electronic lock and key mechanism

Details Electronic lock and key mechanism Electronic lock and key mechanism

1985-05-14

1992-01-07

Pitts, Harold I.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235468, G06K 500

Patent

active

050794116

ABSTRACT:
An electronic lock mechanism utilizing for the opening thereof a card-key upon which digital codes are imprinted. The digital codes are created by infrared light transmissive portions and infrared light non-transmissive portions on the card-key. The electronic lock mechamism determines the digital codes of the card-key by directing infrared light upon the surface of the card-key, and measuring the times in which the light passes through the infrared light transmissive portions of the card-key, and compares these digital codes with pre-selected digital codes. Only during those times in which the digital codes imprinted upon the card-key and the pre-selected digital codes are identical may the electronic lock mechanism unlock.

REFERENCES:
patent: 3614430 (1971-10-01), Berler
patent: 3829662 (1974-08-01), Furahashi
patent: 4217487 (1980-08-01), Kjeer
patent: 4436991 (1984-03-01), Albert

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