Electrical switch with sliding contacts
US4401862A · kind A · utility
Inventors
Key dates
| Filing date | May 29, 1981 |
| Grant date | Aug 30, 1983 |
| Priority date | — |
| Expiry date | May 29, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H19/563
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an electrical switch being subject to high contact pressure and using contacts of relatively soft contact material, the isolating or electrical resistance is impaired by contact wear. A contact and a counter contact spring supported by an isolating support before and/or behind the contact with an area the surface of which is located lower than the level of the topside of the contact. On at least one side of said recess area, the isolating support is provided with an elevated portion which also extends in the direction of relative movement of the contact spring and on which the contact spring rests when the switch is in its open position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.