Geometrical instruments – Area integrators – Electrical
Patent
1981-04-02
1983-06-28
Haroian, Harry N.
Geometrical instruments
Area integrators
Electrical
33174L, G01B 728
Patent
active
043897860
ABSTRACT:
An instrument for measuring the shape of the outer surface, i.e., the contour of a workpiece. In this contour measuring instrument, the tip of a stylus fixed on one end of a rotatable arm is brought into contact with the outer surface of the workpiece, the arm in this condition is moved in the axial direction thereof, and the vertical movement of the stylus tracing the irregularities on the outer surface of the workpiece is detected by a differential transformer so as to measure the contour of the workpiece. In this contour measuring instrument, there are provided a driving mechanism for forcing the arm to turn in a predetermined direction and an arm turning angle detecting mechanism for detecting the turning of the arm by the driving mechanism beyond a predetermined angle to stop the driving mechanism in operation, whereby the detection angle detected by the arm turning angle detecting mechanism is set at a predetermined angle, so that the arm can be inserted into an object to be measured, being of a cylindrical shape, or a hole and the like of the object.
REFERENCES:
patent: 3962792 (1976-06-01), Stepanek
patent: 4074438 (1978-02-01), Takeda
patent: 4231158 (1980-11-01), Possati
patent: 4265022 (1981-05-01), Noguchi et al.
Sakata Hideo
Takahashi Seigo
Haroian Harry N.
Mitutoyo Mfg. Co. Ltd.
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