Protrusion sensor for sensing protrusion on a disc

Details Protrusion sensor for sensing protrusion on a disc Protrusion sensor for sensing protrusion on a disc

1994-11-29

1996-02-06

Noland, Thomas P.

Measuring and testing

Surface and cutting edge testing

Roughness

73660, G01B 1708

Patent

active

054888573

ABSTRACT:
A protrusion sensor according to the present invention comprises a protrusion sensing head, a suspension spring having a front end portion fixedly mounting the protrusion sensing head and a rear end portion fixedly secured to one surface of a support arm, a carriage for supporting the support arm and a vibration sensor of piezo-electric ceramics fixedly mounted on the other surface of the support arm. A protrusion is detected by the collision of the protrusion sensing head flying by air flow on a surface of a rotary disc caused by rotation thereof with a protrusion.

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patent: 5168412 (1992-12-01), Doan et al.
patent: 5237861 (1993-08-01), Suda et al.

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