Eddy-current meter

Details Eddy-current meter Eddy-current meter

1975-02-20

1976-12-07

Gill, James J.

Measuring and testing

Speed, velocity, or acceleration

Magnetic speed measuring or mechanical speed measuring with...

73520, G01P 349

Patent

active

039954994

ABSTRACT:
An eddy-current meter comprises a permanent magnet fixed for rotation with a shaft whose rotation speed is to be measured. A metal cup is disposed close to the permanent magnet and attached to a spindle carrying a pointer. The spindle is rotatable against the bias of a spiral spring. The spindle is rotatably mounted on a support bearing of the shaft. A helical compression spring is mounted insuring that the support bearing of the shaft and the journal of the spindle are axially and yieldably biased toward each other with a force the magnitude of which is adjustable. The spindle is maintained in coaxial relationship with the shaft by two axially spaced radial bearings.

REFERENCES:
patent: 1067463 (1913-07-01), Cadman
patent: 3196692 (1965-07-01), Jensen
patent: 3422683 (1969-01-01), Powell

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