Reticle protective structure and radiation sensitive validation

Details Reticle protective structure and radiation sensitive validation Reticle protective structure and radiation sensitive validation

1975-12-01

1977-11-01

Smith, Alfred E.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250571, 250239, 209DIG2, G06K 500, G06K 1100

Patent

active

040567311

ABSTRACT:
The reticle of a paper currency validating device of the type which uses a radiation sensing system is protected by the provision of a thin sapphire disc covering the reticle.

REFERENCES:
patent: 3457421 (1969-07-01), Bayha
patent: 3564268 (1971-02-01), Bayne
patent: 3581100 (1971-05-01), Milford

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