Digital pointer position detector

Details Digital pointer position detector Digital pointer position detector

1983-01-19

1986-12-23

Caldwell, Sr., John W.

Communications: electrical

Continuously variable indicating

Via radiant energy beam

250231SE, 340347P, 34087002, G08C 906, G08C 1936

Patent

active

046315390

ABSTRACT:
A mechanical dial indicating gauge or meter that, without mechanical loading, optoelectronically detects and encodes the pointer position as a digital signal by use of a technique of distributed point position latching. Counter means drives a circuit which cylically sequentially lights LED's along a scale and the count is latched that corresponds to current counter position when a detector on the scale pointer is activated during the sequential lighting. This latched count provides the digital signal of pointer position. This digital signal may then by transmitted to remote indicators, controllers, computers, and/or may be compared to preset values yielding set point outputs. An electrical lead for the detector includes a spiral loosely surrounding the pointer stem.

REFERENCES:
patent: 2978693 (1961-04-01), Champion
patent: 3201779 (1965-08-01), Emmerich
patent: 3766544 (1973-10-01), Batz
patent: 3815126 (1974-06-01), Batz
patent: 4074128 (1978-02-01), Harris
patent: 4101882 (1978-07-01), Kramer
patent: 4137451 (1979-01-01), Einolf
patent: 4212000 (1980-07-01), Yamada
patent: 4327362 (1982-04-01), Hoss
patent: 4334222 (1982-06-01), Kelley
patent: 4412206 (1983-10-01), Schwefel

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