Digital tachometer with air gap adjusting yoke insertable throug

Details Digital tachometer with air gap adjusting yoke insertable throug Digital tachometer with air gap adjusting yoke insertable throug

1988-10-11

1989-12-26

Strecker, Gerard R.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

73518, 324156, 324208, 361399, G01P 3487, G01R 104, H05K 700

Patent

active

048900591

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.

REFERENCES:
patent: 3742243 (1973-06-01), Gamble

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