Badge reader with reliable data clocking means

Details Badge reader with reliable data clocking means Badge reader with reliable data clocking means

1978-06-29

1980-02-12

Cook, Daryl W.

Registers

Coded record sensors

Synchronization

235482, G06K 7016

Patent

active

041879805

ABSTRACT:
Apparatus is disclosed for reading a data encoded badge or document, wherein the operator manually inserts the badge into the reader. In the preferred embodiment, there is provided a movable slide element having clock holes thereon and means for ensuring that such slide moves in synchronism with the badge as it is inserted into and withdrawn from the reader by the operator. Suitable sensors and accompanying electronics are provided to synchronize the reading of data from the card with the detection of the passage of slide clock holes past a predetermined point in the reader. Special reader electronics is provided to ensure reliable clock detection, and to inhibit false generation of clock signals which could result from sensor ringing.

REFERENCES:
patent: Re29449 (1977-10-01), Gorgens
patent: 3496342 (1970-02-01), Milford
patent: 3555247 (1971-01-01), Gruczelak
patent: 3796861 (1974-03-01), Hirata
patent: 3885132 (1975-05-01), Luoma
patent: 3896291 (1975-07-01), Wiedeman

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