Warp sensing apparatus

Details Warp sensing apparatus Warp sensing apparatus

1991-10-22

1993-08-03

Will, Thomas B.

Geometrical instruments

Gauge

Straightness, flatness, or alignment

33553, 33522, G01B 520, G01B 528

Patent

active

052317676

ABSTRACT:
A warp sensing apparatus for measuring the displacement or warp in disk-shaped objects such as drum lids and the like. A drum lid or other disk-shaped object is centered on the apparatus and clamped at the axis of rotation of the disk-shaped object. After the disk-shaped object is clamped, a contact probe of a transducer is positioned on the surface of the disk-shaped object to measure bidirectional displacement of the contact probe perpendicular to the surface of the disk-shaped object caused by undulations in the surface of the disk-shaped object. A manual rotating wheel permits the disk-shaped object to be rotated. A meter readout on the transducer displays the magnitude and direction of the contact probe displacement caused by undulations in the disk-shaped object as the disk-shaped object is rotated.

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patent: 4750141 (1988-06-01), Judell et al.
patent: 4936018 (1990-06-01), Robinson et al.

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