Fan control and diode interlock for electric heaters
US5173843A · kind A · utility
11Cited by
10References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1990 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Sep 11, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/176
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A fan control board and circuit having a central low voltage wiring center as well as a safety interlock for electric heater in which the interlock uses diodes to ensure proper fan operation in the event of miswiring of the heater sequencers. Another feature of the invention is a quick connect for a time delay of the circuit which permits easy insertion and removal thereof for replacement and/or cleaning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.