Pocket surface roughness gage

Details Pocket surface roughness gage Pocket surface roughness gage

1987-06-19

1988-10-11

Chapman, John

Measuring and testing

Surface and cutting edge testing

Roughness

G01B 528

Patent

active

047762128

ABSTRACT:
A compact, efficient, self-contained dynamic surface roughness gage includes a staging frame that supports a reciprocatable arm that can be pivoted about an axis perpendicular to a V-shaped working surface at the underside of the frame between releasably fixed positions located 90.degree. apart to facilitate staging the gage on different workpiece configurations. The arm supports a probe comprising a skid and a stylus which is coupled by way of a special flexure to a stereo phonograph cartridge so that only the vibratory motions of the stylus in a direction perpendicular to the nominal plane of the frame working surface are coupled to the transducer. As the probe scans over a workpiece surface with the skid following the same track as the stylus, the two outputs from the transducer are summed to produce a single electrical analog of the vibratory motion of the stylus in that favored direction. That signal is coupled to a control circuit which processes the signal and applies an instruction to a display which thereupon shows a number correspnding to the surface roughness of the workpiece as measured by the gage.

REFERENCES:
patent: 2404143 (1946-07-01), Reason
patent: 2460726 (1949-02-01), Arndt, Jr.
patent: 2620655 (1952-12-01), Priest
patent: 3049002 (1962-08-01), Hediger
patent: 4106333 (1978-08-01), Salje et al.
patent: 4133204 (1979-01-01), Mittleman
patent: 4359892 (1982-11-01), Schnell et al.
patent: 4574625 (1986-03-01), Olasz et al.
patent: 4665739 (1987-05-01), Mizuno

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