Method and apparatus for encoding machine readable serial encryp

Details Method and apparatus for encoding machine readable serial encryp Method and apparatus for encoding machine readable serial encryp

1991-10-25

1994-02-22

Westin, Edward P.

Registers

Coded record sensors

Particular sensor structure

235493, 360 2, G06K 708

Patent

active

052889815

ABSTRACT:
The present invention provides a method and apparatus for encoding and detecting data from magnetically encoded access cards. The invention includes a control unit (1) having an access card slot (4) communicating with a microprocessor (11) and sensor (3). A barium ferrite access card (5) magnetically encoded in a particular grid pattern is interposed within the card slot, and the encoded grid pattern is then detected and "read" by the sensor. The encoded data in grid form is then transmitted to the microprocessor which, in turn, assigns to the magnetically encoded grid representation a numeric value. This numeric value is then compared with a list of values stored in the microprocessor and if the detected and translated numeric value corresponds to a stored value, the microprocessor, directly or indirectly, emits a signal to activate or deactivate a device to be controlled (10).

REFERENCES:
patent: 3788617 (1974-01-01), Barney
patent: 4055746 (1977-10-01), Peterson
patent: 4455484 (1984-06-01), Whitehead
patent: 5160833 (1992-11-01), Nakahara

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