Digital pointer position detector
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United States of America Patent
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-
Dec 23, 1986
Grant Date -
N/A
app pub date -
Jan 19, 1983
filing date -
Jan 19, 1983
priority date (Note) -
Expired
status (Latency Note)
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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.
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