Electric time switch
US4205292A · kind A · utility
2Cited by
2References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1978 |
| Grant date | May 27, 1980 |
| Priority date | — |
| Expiry date | Jun 22, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H43/304
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric time switch mechanism is provided comprising a plurality of units each having an operating thermal expansion member, for example, a bimetallic member. Electrical heating means are provided for the thermal expansion member and a switch is activated by the thermal expansion member. The units are connected in series in such a way that the activation of a switch turns off the heating means of the associated thermal expansion member and turns on that of the following units. The switches remain in the activated state after activation and are resettable by external activation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.