Measurement apparatus for interrupted surfaces

Details Measurement apparatus for interrupted surfaces Measurement apparatus for interrupted surfaces

1979-09-12

1981-03-03

Haroian, Harry N.

Geometrical instruments

Area integrators

Electrical

33147L, 33147N, 33178E, G01B 728, G01B 520

Patent

active

042532400

ABSTRACT:
A measurement apparatus includes a measuring rod with a contact surface for contacting a workpiece. One or more proximity sensors is mounted on the measuring rod adjacent the contact surface. A brake shoe, responsive to the output of the proximity sensor, is provided to automatically clamp the rod in place when the sensor detects a surface interruption in the workpiece in order to prevent the rod from dipping into the interruption. The apparatus also includes a pair of leaf springs arranged to lift the rod and to separate the contact surface from the workpiece when the rod is clamped by the brake shoe.

REFERENCES:
patent: 3210854 (1965-10-01), Wolfram et al.

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