Flame detection
US4088984A · kind A · utility
12Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1976 |
| Grant date | May 9, 1978 |
| Priority date | — |
| Expiry date | May 18, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2229/12
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A flame detecting apparatus in which a detecting electrode is disposed in a flame, the base of a transistor is connected to the detecting electrode and biased with a predetermined DC voltage derived from a biasing circuit, the biasing circuit including a resistor and the impedance of the flame, an AC signal is applied to the emitter of the transistor, and an amplified AC signal is derived from the collector of the transistor as an output signal; the output signal being used as a control signal for a fuel supply control and/or an indicator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.