Key code

Details Key code Key code

1982-02-26

1984-02-21

Stearns, Richard R.

Geometrical instruments

Area integrators

Electrical

70352, 70387, 70405, G01B 700, E05B 3504

Patent

active

044321422

ABSTRACT:
A key reading system including a key having a plurality of rows of reading positions, each reading position cooperating with a reading position in each other row to form a set of reading positions. The reading system includes a clock line which senses all but one of the total number of code combinations of each set as a clock pulse, thus eliminating the need for a separate clock pulse row.

REFERENCES:
patent: 3393542 (1968-07-01), Crepinsek
patent: 3640107 (1972-02-01), Litvin
patent: 3824818 (1974-07-01), Neale
patent: 3877267 (1975-04-01), Harris, Jr.
patent: 4007615 (1977-02-01), Nossum
patent: 4283859 (1981-08-01), Roland

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