Credit card validation aid

Details Credit card validation aid Credit card validation aid

1975-09-08

1976-10-12

Haroian, Harry N.

Optics: image projectors

Plural

353 25, G03B 2126

Patent

active

039854310

ABSTRACT:
A device operative with endless loop cartridges containing reflective microfilm lists of invalid credit cards is configured for receiving at a bank of slots separate cartridges to be supplied by each credit organization. A credit card holder has plural guides, each guide for the credit card of a different organization. A sensing switch is provided for detecting the presence of a credit card in a guide. The switches are each connected to associated ones of plural projector light sources, and plural magnetic clutches for driving the cartridges from a common motor. A projected list image for the associated credit card organization, is run serially past a segmented screen in response to the switch and a motor speed control unit.

REFERENCES:
patent: 1918468 (1933-07-01), Harding
patent: 3632196 (1972-01-01), De Pizzol
patent: 3667838 (1972-06-01), Wood
patent: 3861792 (1975-01-01), Donati
patent: 3914037 (1975-10-01), Peters

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