Warp sensing apparatus
US5231767A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1991 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Oct 22, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B5/285
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.