Off-line magnetic card reader system operable as though normally

Details Off-line magnetic card reader system operable as though normally Off-line magnetic card reader system operable as though normally

1975-06-17

1977-01-18

Cook, Daryl W.

Registers

Calculators

Input-output calculator to indicator, printer, etc.

235 6111D, G06K 500, G06K 708

Patent

active

040041344

ABSTRACT:
A card has two sets of magnetized spots, one set being readable by a reader in an on-line system, and the other set being readable by an off-line reader. Coupled to the off-line reader is a pulse generator adapted to develop pulses of the same character as "go" and "no-go" pulses generated by a station query and stored data comparison console in response to data from the on-line reader. A gate network normally keeps the console in communication with the on-line reader, but is operated to couple the pulse generator to the on-line reader when the console fails to query and cannot send command pulses. Also disclosed are timing devices for delaying operation of the output apparatus for a period corresponding to the time required for the normal on-line system operation to actuate such apparatus.

REFERENCES:
patent: 3598964 (1971-08-01), Dell
patent: 3602697 (1971-08-01), Tanaka et al.
patent: 3686479 (1972-08-01), Rogers et al.
patent: 3780268 (1973-12-01), Rogers et al.
patent: 3859508 (1975-01-01), Brosow et al.
patent: 3896292 (1975-07-01), May et al.

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