Thermostatic control device
US4166996A · kind A · utility
2Cited by
3References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1977 |
| Grant date | Sep 4, 1979 |
| Priority date | — |
| Expiry date | Dec 29, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H37/60
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Movement of the diaphragm pad occasioned by change in pressure within the diaphragm in response to a change in sensed temperature causes the bowed actuating spring to increase or decrease the degree of flexure to actuate the switch. In order to accommodate the pressure variations induced by a wide range of ambient temperature conditions the diaphragm is preloaded by a second bowed spring. A cam mechanism can be provided to vary the flexure of the preloading spring to thereby adjust the temperature at which the switch will be actuated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.