Measuring and testing – Surface and cutting edge testing – Roughness
Patent
1976-08-09
1978-08-15
Ruehl, Charles A.
Measuring and testing
Surface and cutting edge testing
Roughness
G01B 528
Patent
active
041063333
ABSTRACT:
The invention provides a method of examining roughness of a surface of a workpiece, comprising: scanning said surface by means of a resiliently mounted support element during linear relative movement between a sensing element and said surface whereby self-oscillations are generated at the sensing element or at parts in connection therewith by unevennesses of said surface; receiving said self-oscillations; and determining a value which corresponds at least approximately to the magnitude of the amplitudes of the oscillations, said value being a criterion of roughness of said surface. The invention also provides apparatus for examining roughness of a surface of a workpiece, comprising: a holder; a sensing element; a support for the sensing element; the sensing element being movably supported against a yielding resistance by the holder; and a receiver system for oscillations and adapted to deliver electrical signals at its output, the sensing element or the support therefor being connected with the receiver.
REFERENCES:
patent: 2240278 (1941-04-01), Abbott
patent: 2405133 (1946-08-01), Brown
patent: 2460726 (1949-02-01), Arndt, Jr.
patent: 2471009 (1949-05-01), Reason
patent: 2991331 (1961-07-01), Ross
Mushardt Heinrich
Salje Ernst
Ruehl Charles A.
Salje Ernst
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