Input keyboard apparatus for an electronic computer

Communications: electrical – Digital comparator systems

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Details

G06F 302

Patent

active

039784533

ABSTRACT:
A keyboard and circuitry for recording the key on the keyboard that is depressed. The recorded information is then supplied to a computer which acts in accordance with the information associated with the depressed key. The keyboard is arranged in a matrix of rows and columns. The recording circuitry comprises a shift register having two groups of cells, the first group receptive of an information bit from the column of the depressed key and the record group receptive of an information bit from the row of the depressed key. The shift register are then shifted and the information stored therein is utilized by the computer. The encoding and the storage of the information entered on the keyboard are effected by the central unit carrying out the commands in a control store under the control of a microprogram.

REFERENCES:
patent: 3593313 (1971-07-01), Tomaszewski et al.
patent: 3745536 (1973-07-01), Klehm, Jr.
patent: 3760171 (1973-09-01), Wang et al.
patent: 3863060 (1975-01-01), Rode et al.

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