Switching apparatus with voltage spike prevention
US7609135B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 2004 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Nov 5, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching apparatus has a conductive housing forming a chamber. The housing has an aperture enabling communication between the chamber and a housing exterior. A rod extends through the aperture, and has a first end within the chamber, and an opposed second end outside the chamber. The rod reciprocates over a range of motion between a first position in which a limited portion of the rod extends into the chamber, and a second position in which a greater portion of the rod extends into the chamber. The rod has a electrically insulative portion electrically isolating the first end from the second end, and has a conductive surface contacting the housing. A pair of electrical contacts are located in the chamber, and a shorting bar connected to the first end of the rod operates to bridge the contacts when the rod is in a selected position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.