Gyroscopic devices
US4655081A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1985 |
| Grant date | Apr 7, 1987 |
| Priority date | — |
| Expiry date | Feb 20, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/567
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gyroscopic device comprising a resonator in the form of a disc, cylinder or like structure of circular outline, of a composition containing piezo-electric material and preferably made of a an integral mass of such material. The resonator is excited into dilatation-type vibration by electric currents applied to exciting electrodes electro-deposited in a regular pattern around the circumference of the structure, and these vibrations are sensed by detecting electrodes similarly deposited around the wall in a similar but angularly displaced pattern. A measure of any rate of turn which the structure is undergoing about its axis can be derived from the resulting phase shift of the electrical output from the detecting electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.