Position discrimination device for a thumb wheel switch

Details Position discrimination device for a thumb wheel switch Position discrimination device for a thumb wheel switch

1982-04-12

1985-02-26

Groody, James J.

Communications: electrical

Continuously variable indicating

340347P, 377 17, 377 86, G08C 900

Patent

active

045020507

ABSTRACT:
A position discrimination device for a thumb wheel switch comprises a shift register and a ROM. The output data from the shift register and the data, determined by an inverted output from the shift register and by an output from a conductive terminal which corresponds to a state of the thumb wheel switch, are written into the ROM. The ROM supplies data to the shift register and generates a code signal corresponding to the state of the thumb wheel switch.

REFERENCES:
patent: 2733430 (1956-01-01), Steele
patent: 2823345 (1958-02-01), Ragland
patent: 2867797 (1959-01-01), Greene
patent: 4016432 (1977-04-01), Marzalek
patent: 4334222 (1982-06-01), Kelley

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