Variable resistor with a switching mechanism
US5155465A · kind A · utility
2Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1991 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Jan 15, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C10/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable resistor with a switching function includes arcuate resistive layers and arcuate electrodes arranged alternately on a base plate. A protective layer is formed on the base plate adjacent to a first electrode and between the arcuate resistive layers. A gap separates the protective layer from the first electrode in order to electrically isolate the protective layer. A movable portion has brushes fixed thereto which slidably contact the resistive layers, the electrodes, and the protective layer. The protective layer serves as a lubricating layer to reduce the wear on the brush.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.