Vacuum actuated switch
US4190752A · kind A · utility
4Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Nov 22, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vacuum actuated switch has a pair of snap action contacts which are actuated in response to the operation of two vacuum motors. One vacuum motor controls the opening and closing of the contacts in a first predetermined range of vacuum. The other vacuum motor extends the range of operation to a second and larger predetermined range of vacuum wherein one limit of the second range is the same as the first range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.