Interlocking system with a number of individual key elements

Details Interlocking system with a number of individual key elements Interlocking system with a number of individual key elements

1974-01-14

1976-02-03

Cook, Daryl W.

Registers

Calculators

Input-output calculator to indicator, printer, etc.

235 6111E, G06k 1906, G06k 710

Patent

active

039366626

ABSTRACT:
An interlocking system includes a number of individual key elements such as an identity card each of which has a pre-determined code marking consisting of a number of index elements arranged to form a pattern. At least one interlocking device adapted to co-operate with the key elements includes a release element sensitive to radiation as a function of the radiation pattern pre-determined by the code marking on the key element. The interlocking device comprises a radio-active radiation source, a detector and means such as a slot for interposing the coded key element between the radiation source and the detector.

REFERENCES:
patent: 2919851 (1960-01-01), Otis
patent: 2970877 (1961-02-01), Parsons et al.
patent: 3657521 (1972-04-01), Constable
patent: 3691527 (1972-09-01), Yamamoto
patent: 3761682 (1973-09-01), Barnes et al.

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