Temperature controlled timer
US4378486A · kind A · utility
9Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1980 |
| Grant date | Mar 29, 1983 |
| Priority date | — |
| Expiry date | Dec 29, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G15/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature controlled timer useful for controlling the application of power to apparatus such as automobile block heaters or the like. In one embodiment the time of application of power prior to a shut off time is decreased with increasing ambient temperature. In another embodiment the duty cycle of cyclically applied power is changed so that the power on period becomes shorter and the power off period becomes longer with increasing ambient temperature. Significant conservation of power results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.