Apparatus for preventing arc discharge of transfer switch circuit for inductive load
US4490768A · kind A · utility
6Cited by
12References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1983 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Jan 21, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2009/307
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an arc preventing apparatus of a transfer switch connected to an inductive load, the movable contact of the transfer switch is stopped temporarily while it is transferred from one stationary contact to the other by means of a rotary cam. The cam is provided with a high point, a low point and a peripheral portion intermediate the high and low points so that while the actuating lever of the movable contact is engaging the intermediate peripheral portion, the movable contact is held stationary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.