| 摘要 |
A key array 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 rectangular keyboard. The pairs of adjacent keys and the square groups of four keys, respectively, each are allocated to a single symbol and each are depressable simultaneously by the operator's fingertip in order to initiate the single 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.
|
