Registers – Calculators – Input-output calculator to indicator – printer – etc.
Patent
1975-03-07
1976-11-30
Cook, Daryl W.
Registers
Calculators
Input-output calculator to indicator, printer, etc.
200 46, 340174HA, G06K 708, H01H 4308, G11C 1102
Patent
active
039951456
ABSTRACT:
A card reader utilizing an array of magnetically-operable solid state switches for reading magnetically coded cards. Magnets are employed to provide magnetic fields of sufficient strengths from poles of specific polarity to trigger or actuate some or all of the solid state switches. An array or matrix of the magnetically-operable solid state switches are provided in combination with a magnet-carrying block having magnets disposed therein. In several embodiments the magnets are slidably mounted in the block and are adapted to be attracted or repelled by a properly coded card having magnetized spots arranged in a predetermined pattern therein. In two preferred embodiments the card reader is combined with a card-operable magnetic lock. In that embodiment some of the magnets in the magnet-carrying block function as locking elements or tumblers.
REFERENCES:
patent: 3634657 (1972-01-01), Ballard et al.
patent: 3651312 (1972-03-01), Barney
patent: 3788617 (1974-01-01), Barney
patent: 3860796 (1975-01-01), Wallace et al.
patent: 3862399 (1975-01-01), Cain
Cook Daryl W.
Greer Hydraulics, Inc.
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