EP 0388065 A3 19910424 - FLAME DETECTION APPARATUS AND METHOD
Title (en)
FLAME DETECTION APPARATUS AND METHOD
Publication
Application
Priority
GB 8906235 A 19890317
Abstract (en)
[origin: EP0388065A2] Apparatus and methods are described for the detection of the presence of a flame (10), the apparatus including circuit means for applying an alternating voltage to a flame probe (2) such that the alternating voltage is partially rectified in the presence of a flame (10) at the probe (2) resulting in the development of a DC voltage component. The DC voltage component causes the accumulation of a corresponding electrical charge in a storage element (18), the apparatus includes means (120,36) for periodically releasing the charge. An optical coupling means (40) is responsive to the released charge to initiate a control signal in a control signal generator (130), the control signal indicating detection of the flame (10).
IPC 1-7
IPC 8 full level
F23N 5/12 (2006.01)
CPC (source: EP)
F23N 5/123 (2013.01); F23N 2223/20 (2020.01); F23N 2229/00 (2020.01); F23N 2229/12 (2020.01)
Citation (search report)
- [Y] DE 1526255 A1 19700402 - MAY & CHRISTE GMBH
- [YD] GB 1419653 A 19751231 - KIDDE & CO WALTER
- [A] US 4370125 A 19830125 - DONNELLY DONALD E, et al
- [A] US 3348104 A 19671017 - ZIELINSKI ROBERT J, et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 4, no. 150 (M-37)(632) 22 October 1980, & JP-A-55 102826 (TOKYO SHIBAURA) 06 August 1980,
Designated contracting state (EPC)
BE DE FR NL
DOCDB simple family (publication)
EP 0388065 A2 19900919; EP 0388065 A3 19910424; GB 2230632 A 19901024; GB 8906235 D0 19890504; GB 9004948 D0 19900502
DOCDB simple family (application)
EP 90302390 A 19900306; GB 8906235 A 19890317; GB 9004948 A 19900306