Wide range magnetically biased reed switch
US4214220A · kind A · utility
3Cited by
0References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 5, 1978 |
| Grant date | Jul 22, 1980 |
| Priority date | — |
| Expiry date | Sep 5, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H51/284
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A normally closed reed relay switch is provided having an enhanced ratio of reclosure to open current. A permanent magnet is used to bias closed a normally open reed relay switch. An electrical coil is placed around one end of the reed relay switch so as to offset the flux distribution of the permanent magnet thereby allowing the switch to assume an open position. The position of the magnet and the coil with respect to the reed relay switch results in an enhanced ratio of reclosure to open current on the order of 10 to 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.