Registers – Coded record sensors – Particular sensor structure
Patent
1976-05-26
1978-05-09
Kilgore, Robert M.
Registers
Coded record sensors
Particular sensor structure
G06K 710
Patent
active
040882659
ABSTRACT:
Card reader apparatus having efficient means for reading information carried by paper cards or the like in the form of punched holes, marks, or both holes and marks. A dual LED light source configuration cooperates with a single light sensitive element to provide for sensing of light transmitted through punched holes in cards transported through the reader, or light reflected from the transported cards. The light sensitive element is incorporated into a simple signal processing circuit which is enabled to generate like output signals corresponding to the sensing of either marks or holes. A novel switching arrangement modifies both the energization of the light source arrangement and the polarity of the electrical supply connected to the processing circuit so as to enable utilization of the simple processing circuit in the operation of the card reader in any one of the reading modes.
REFERENCES:
patent: 3655945 (1972-04-01), Bowen
Kilgore Robert M.
Peripheral Dynamics, Inc.
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