Geometrical instruments – Gauge – With support for gauged article
Patent
1998-04-02
2000-04-11
Hirshfeld, Andrew H.
Geometrical instruments
Gauge
With support for gauged article
33546, 33551, G01B 336, G01B 340, G01B 348
Patent
active
060474793
ABSTRACT:
Method and device for accurately measuring a longitudinal contour of a measuring object, wherein use is made of clamping members for retaining a measuring object to be measured; a scanning arm which is pivotable about an axis transverse to a longitudinal center line of the clamped measuring object and whose free end comprises one scanning needle, the scanning arm being mounted on a driving device which, in operation, can move the scanning arm in one linear direction of movement parallel to the longitudinal center line of the measuring object, and means being provided for detecting the angular displacement of the scanning arm and the position of the scanning arm in said one linear direction of movement; and a processor for processing information regarding the angular displacement and the position of the scanning arm, wherein a contour measurement is made in such a manner that the scanning needle moves along a contour flank in downward direction only, i.e. in the direction of the bottom of a profile groove.
REFERENCES:
patent: 3750297 (1973-08-01), Linley
patent: 5097602 (1992-03-01), Cross
patent: 5276974 (1994-01-01), Chanoni
Francis Faye
Hirshfeld Andrew H.
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