Key array

Details Key array Key array

H - Electricity

04

L

340/175

H04L 17/02 (2006.01) H01H 13/84 (2006.01)

Patent

CA 1117202

ABSTRACT OF THE DISCLOSURE A key array is suggested in which, progressing from key to key the switching functions are derived by an AND- operation from mechanical or electrical signals indicating the actuation of pairs of adjacent keys of a row of keys or indicating the actuation of at least two diagonally opposite keys of a square group of four keys arranged in a keyboard. The pairs of adjacent keys and the square groups of four keys, respectively, each are allocated to one symbol and each are depressable simultaneously by the operator's fingertip in order to initiate the respective switching function. Thereby, a large surface lying in one single plane and being divided by gaps between the respective keys of one pair of keys or one group of keys, is available for the symbol legend and for engagement by the fingertip.

305880

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