Robert C Lindstrom

US Patent:

39854310, Oct 12, 1976

Filed:

Sep 8, 1975

Appl. No.:

5/611557

Inventors:

Robert D. Lindstrom - Bridgeview IL

Assignee:

Lawrence Peska Associates, Inc. - New York NY

International Classification:

G03B 2126

US Classification:

353 94

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.