Reading stroke codes

Details Reading stroke codes Reading stroke codes

1979-04-17

1981-09-15

Kilgore, Robert M.

Registers

Coded record sensors

Particular sensor structure

235467, 235454, 3401463K, G06K 710, G06K 714, G06K 900

Patent

active

042899575

ABSTRACT:
The reading of an identification card with stroke code comprises sweeping of a control area by a laser beam, detection by photo-detectors of light reflected by the card and from the edges thereof, amplification, selection by a chronometer of the useful signal, placing of the signal into a buffer memory, and treatment by a micro-processor and an ordinator for reconstitution of a complete message by means of two successive incomplete sweeps comprising at least one upper or lower security character.

REFERENCES:
patent: 3106706 (1963-10-01), Kolanowski
patent: 3553437 (1971-01-01), Boothroyd
patent: 3818444 (1974-06-01), Connell
patent: 3852573 (1974-12-01), Dolch
patent: 3916158 (1975-10-01), Sansone
patent: 3970825 (1976-07-01), Plockl
patent: 4097729 (1978-06-01), Seligman
patent: 4122352 (1978-10-01), Crean

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