Non-contacting gauge for surfaces
US4986111A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 1989 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Aug 10, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B13/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A non-contacting gauge for measuring small variations in the surfaces of objects comprises: PA0 (a) a chamber separated into two sub-chambers by a vibrating diaphragm, PA0 (b) a nozzle for each sub-chamber, PA0 (c) a reference surface adjacent to one of the nozzles, and, PA0 (d) a frame holding the chamber and reference surface moveable relative to the surface to be gauged and adapted to bring the other nozzle into the vicinity of the surface. The gauge is a versatile instrument which, while particularly suitable for measuring changes in the dimensions of geological core samples to determine residual strains, is also suitable for a range of measurement problems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.