Safety lock

Details Safety lock Safety lock

1984-02-16

1986-06-03

Trafton, David L.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235454, 235475, 361172, G06K 500

Patent

active

045931852

ABSTRACT:
The present invention provides a safety lock actuatable with a flat key carrying a code. The code is digitally generated by a laser beam and is sensed by detector laser beam upon or after the introduction of the key into the lock. The digital coding is produced by means of burning discrete depressions into a suitable layer on the key with a sufficiently strong laser beam and the sensing of the coding is done by means of a weaker laser beam.

REFERENCES:
patent: 3784795 (1974-01-01), Tuhro
patent: 4369481 (1983-01-01), Early
patent: 4464566 (1984-08-01), Silverman et al.

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