Variable capacitor
US6147855A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1997 |
| Grant date | Nov 14, 2000 |
| Priority date | — |
| Expiry date | Jun 30, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G5/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable capacitor that provides a full range of capacitance, while reducing the amount of rotation necessary to effect maximum variation in capacitance, and while eliminating any wear-related deterioration in device performance includes at least two coplanar, electrically isolated sets of parallel electroconductive members so configured as to form a fixed set of capacitor plates, each of which may be separately electrically connected to an electrical circuit. A movable group having at least one member including at least one electroconductive area is positioned parallel to, and spaced from, the fixed set of plates. The movable group is adapted for rotation about an axis perpendicular to a surface plane of the first set of plates to vary an amount by which said movable group overlaps the surface of each of said capacitor plates, and thereby provide variable capacitive coupling between the two isolated electroconductive members that comprise the fixed set of capacitor plates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.