EP 0867661 A3 20000524 - Flame monitoring device with flame rod
Title (en)
Flame monitoring device with flame rod
Title (de)
Flammenwächter mit Flammenstab
Title (fr)
Dispositif de surveillance de flamme avec électrode d'ionisation
Publication
Application
Priority
DE 19712938 A 19970327
Abstract (en)
[origin: DE19712938C1] The circuit has a frequency multiplier circuit (D1-D4) supplied from two phase lines (PH1,PH2) of the AC network supply and supplying the flame rod (FR) of the flame monitor (FA) via a capacitor (C). One of the phase lines (PH2) acts as a reference potential line for the flame monitor, the frequency multiplier circuit provided by a diode bridge circuit and a threshold stage reducing the output voltage to zero when it is below a given threshold value.
IPC 1-7
IPC 8 full level
F23N 5/12 (2006.01)
CPC (source: EP)
F23N 5/123 (2013.01)
Citation (search report)
- [A] EP 0498619 A2 19920812 - BLACK AUTOMATIC CONTROLS LTD [GB]
- [A] DE 2536092 A1 19770224 - BOSCH GMBH ROBERT
- [A] GB 2153126 A 19850814 - LANDIS & GYR AG
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DE 19712938 C1 19980514; DE 59805467 D1 20021017; EP 0867661 A2 19980930; EP 0867661 A3 20000524; EP 0867661 B1 20020911; ES 2179394 T3 20030116
DOCDB simple family (application)
DE 19712938 A 19970327; DE 59805467 T 19980324; EP 98105254 A 19980324; ES 98105254 T 19980324