Registers – Calculators – Input-output calculator to indicator – printer – etc.
Patent
1971-08-27
1977-02-01
Cook, Daryl W.
Registers
Calculators
Input-output calculator to indicator, printer, etc.
209 805, 235 6111A, 235 6112R, 40 22, G06K 704, G06K 1904, B07C 310, G09F 302
Patent
active
040063410
ABSTRACT:
Card comparing apparatus comprising spaced-apart side walls having facing grooves formed therein for receiving a first and a second card in parallel spaced relationship, each of said cards having a predetermined number of notches along its edges, said notches being varied as to depth, and apparatus for determining whether corresponding notches in the cards are of the same depth, said determining apparatus including pairs of vertically disposed probes in sliding contact with each other, said probes being electrically insulating except for an electric conductor vertically positioned in each probe so that said conductors make electrical contact when the probes are in alignment, a series of vertical slots formed in the spaced-apart side walls, said probes being positioned in said slots, springs urging the probes inwardly to enter the notches in said cards, and signal means actuated by said electrical conductors when all corresponding probes are in alignment to complete an electrical circuit.
REFERENCES:
patent: 1739087 (1929-12-01), Perkins
patent: 2198127 (1940-04-01), Rembold
patent: 2213607 (1940-09-01), Nevin
patent: 2515424 (1950-07-01), Rembold
patent: 3292631 (1966-12-01), Cross
patent: 3519767 (1970-07-01), Sinker
patent: 3524545 (1970-08-01), Doundoulakis
patent: 3552562 (1971-01-01), Silverberg
patent: 3624938 (1971-12-01), Richard
patent: 3644713 (1972-03-01), Hayakawa
Cook Daryl W.
Glass John P.
Kilgore Robert M.
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