Security system employing optical key shape reader

Details Security system employing optical key shape reader Security system employing optical key shape reader

1987-10-02

1989-09-19

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

70278, 70DIG51, 361172, E05B 4700

Patent

active

048685593

ABSTRACT:
A security system which employs an optical key shaped reader to photoelectrically derive an electrical signal from a shape characteristic of a key is disclosed. The system provides heightened security over standard key operated systems and is particularly well suited for use in motor vehicles.

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General Motors, RM#53-67, 2/20/85, pp. 1-22.

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