Digital tachometer with air gap adjusting yoke insertable through holes in the tachometer housing
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United States of America Patent
Stats
-
Dec 26, 1989
Grant Date -
N/A
app pub date -
Oct 11, 1988
filing date -
Oct 23, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnet equipped rotating generator wheel cooperates with a stationary sensor cassette containing wire pulse sensors. The sensor cassette is electrically and mechanically fixed to a stiff circuit board to form a structural unit. The generator wheel and structural unit are enclosed within a housing having inner and outer parts, the outer part having a planar front surface. The structural unit is adjustably mounted to the planar front surface of the outer part of the housing of the tachometer. A pair of holes are formed in the circuit board at the air gap location and a corresponding pair of holes in the planar front surface so that the air gap between generator wheel and sensor cassette can be adjusted by inserting a spacing yoke.
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