Dual detector flame sensor
US4370557A · kind A · utility
61Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1980 |
| Grant date | Jan 25, 1983 |
| Priority date | — |
| Expiry date | Aug 27, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2239/02
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
In a multi-burner boiler or industrial furnace installation that uses pulverized coal for fuel and utilizes an oil pilot torch it has been difficult to sense and discriminate satisfactorily between safe and unsafe burner operation in these multi-burner arrangements. By using both a Si detector (visible light responsive) and a lead sulfide detector (infrared responsive) and selectively combining the signals therefrom, the best characteristics of both detectors are utilized to provide satisfactory flame sensing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.