Surface roughness measuring instrument

Details Surface roughness measuring instrument Surface roughness measuring instrument

1989-11-07

1991-09-17

Noland, Tom

Measuring and testing

Surface and cutting edge testing

Roughness

G01B 2130, G01B 528

Patent

active

050483269

ABSTRACT:
A surface roughness measuring instrument is provided with a rotary drive mechanism configured such that two rollers support a sphere at three points, yet the driving torque applied to the sphere at those three points all give an equal tangential velocity. A detector arm is provided between the mounting section for mounting to the surface roughness measuring instrument itself and a tip section which holds skids which make contact with the object to be measured, so that these two sections are able to rock relative to each other about an axis in the direction in which the detector arm extends. Surface roughness in the circumferential direction of a body of rotation can be measured accurately and stably.

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patent: 2778497 (1957-01-01), Bickley
patent: 3768307 (1973-10-01), Rode
patent: 4306455 (1981-12-01), Selleri
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patent: 4776211 (1988-10-01), Griswold, Jr.
patent: 4776212 (1988-10-01), Parsons et al.
patent: 4801020 (1989-01-01), Rogne et al.
patent: 4969361 (1990-11-01), Kawasaki et al.

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