Variable resistor
US4864273A · kind A · utility
18Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1988 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Jul 20, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C10/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable resistor having a multi-layer resistive/conductive element is provided. The resistor has three electrodes, a resistive element connecting two of the electrodes and a sliding contact between the resistive element and the third electrode. The base of the resistor is provided with test areas. Each of the test areas contains a strip of the material used to form an individual layer in the multi-layer element. The test areas provide a convenient means for measuring the thickness of the individual layers in the multi-layer element without having to destroy the resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.