Dual-disc shaft position encoder

Details Dual-disc shaft position encoder Dual-disc shaft position encoder

1979-04-02

1980-07-29

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

235 92MP, G06F 300

Patent

active

042153379

ABSTRACT:
The disclosed forms of shaft-position encoder employ "fast" and "slow" rotary selectors coupled by gearing to each other and to the shaft whose position is to be encoded. The selectors cooperate selectively with elements in respective "fast" and "slow" circular series of elements. Two counters register the number of pulses in respective pulse trains, the number of pulses in a train varying in accordance with the number of elements in each of the "fast" and the "slow" series between one end of the series and an element in cooperation with a related selector. The combined values registered in the counters represents the shaft position code. The inherent uncertainty in recognizing when the "slow" counter should register any particular value represented by the position of its selector along its series of elements could create significant ambiguity, which is here resolved through use of the value registered in the counter of the "fast" series of elements.

REFERENCES:
patent: 2793807 (1957-05-01), Yaeger
patent: 3122735 (1964-02-01), Townsend
patent: 3525094 (1970-08-01), Leonard
patent: 3778833 (1973-12-01), Castrovillo
patent: 4041483 (1977-08-01), Groff

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