Variable resistor
US4751492A · kind A · utility
12Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1987 |
| Grant date | Jun 14, 1988 |
| Priority date | — |
| Expiry date | May 22, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/245
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable resistor for use in vehicles and electric apparatus having a resistive body whose resistance value is hardly affected by abrasion. The resistive body is composed of a lower resistive layer formed on the surface of a substrate and an upper resistive layer formed on said lower resistive layer, wherein said upper resistive layer has 2 to 500 times greater value of volume resistivity compared with said lower resistive layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.