Thermostatically operated fuel valve control circuit
US4789329A · kind A · utility
5Cited by
10References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1988 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Feb 22, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2229/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A control circuit for a fuel valve in a gas fired furnace controlled by an electronic thermostat is disclosed. The thermostat requires a load current to properly operate, and a pickup and hold circuit along with a time delay circuit are integrated to control a load current circuit to provide the correct load current for the thermostat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.