Radiant energy – Photocells; circuits and apparatus – Flame light source
Patent
1979-04-19
1981-07-21
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Flame light source
250339, 340578, H01L 900
Patent
active
042800587
ABSTRACT:
The detector has first and second circuits which are interconnected. The first circuit senses the emission of a flame at least in the wavelength range of carbon dioxide and produces useful signals for an alarm means. The second circuit senses spurious emission produced by a thermal radiator. The first circuit is sensitive to the wavelength range of the flame below 6 .mu.m and the second circuit is sensitive to the wavelength range of a long-wave spurious emission above 6 .mu.m. A connecting means interconnects the first and second circuits in such a way that, while taking account of the statistical distribution of the flame emission and the spurious emission, an output signal is produced in such a way that the further transmission of the signal of the first circuit is blocked if a unidirectional output signal of the second circuit occurs at the same time, whereas it is transmitted to the alarm means if the output signal of the second circuit is absent or does not occur unidirectionally.
REFERENCES:
patent: 3665440 (1972-05-01), McMenamin
patent: 3931521 (1976-01-01), Cinzori
patent: 3967255 (1976-06-01), Oliver et al.
patent: 4179606 (1979-12-01), Nakauchi et al.
Cerberus AG
Nelms David C.
LandOfFree
Flame detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flame detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flame detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2433231