Global Patent Index - EP 0821198 B1

EP 0821198 B1 2001-12-12 - Safety device of a burner for igniting the flame, detecting the flame and controlling the gas supply

Title (en)

Safety device of a burner for igniting the flame, detecting the flame and controlling the gas supply

Title (de)

Sicherheitsvorrichtung eines Brenners zur Zündung der Flamme, Detektion der Flamme und Steuerung der Gaszufuhr

Title (fr)

Dispositif de sécurisation de brûleur pour allumage de flamme, détection de flamme et commande d'admission de gaz

Publication

EP 0821198 B1 (FR)

Application

EP 97401757 A

Priority

FR 9609371 A

Abstract (en)

[origin: EP0821198A1] An igniter nozzle, adjoining the main burner, is equipped with two electrodes connected to the spark generator (20). An oscillator (21) and a discharge circuit (22) produce a 15 kV beak-down lasting 5 microseconds. Operation is associated with an ionisation detector (11) using the same electrodes, which ascertains whether a flame is present. Its signal is compared with a preset value; if a flame is detected the oscillator is suppressed. The circuitry also includes boost amplifiers for opening (27) and for maintaining open (24) the gas admission valve (25); their output voltages exceed that of the power supply battery, which is insufficient to open the valve. Accidental opening is thus averted. The equipment is further described in European Patent 0 821 199 (q.v.).

IPC 1-7 (main, further and additional classification)

F23N 5/12

IPC 8 full level (invention and additional information)

F23N 5/12 (2006.01); F23N 1/08 (2006.01); F23N 5/20 (2006.01); F23N 5/24 (2006.01)

CPC (invention and additional information)

F23N 5/123 (2013.01); F23N 1/08 (2013.01); F23N 5/20 (2013.01); F23N 5/24 (2013.01); F23N 2027/02 (2013.01); F23N 2027/22 (2013.01); F23N 2027/36 (2013.01); F23N 2035/14 (2013.01); F23N 2035/16 (2013.01); F23N 2035/18 (2013.01)

Citation (examination)

US 4167767 A 19790911 - COURIER DE MERE HENRI E

Designated contracting state (EPC)

AT BE DE ES FR GB NL

EPO simple patent family

EP 0821198 A1 19980128; EP 0821198 B1 20011212; AT 210802 T 20011215; DE 69708990 D1 20020124; DE 69708990 T2 20020801; ES 2169329 T3 20020701; FR 2751729 A1 19980130; FR 2751729 B1 19981009

INPADOC legal status


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2002-01-24 [REF] CORRESPONDS TO:

- Document: DE 69708990 20020124

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2001-12-12 [REF] CORRESPONDS TO:

- Document: AT 210802 T 20011215

2000-02-09 [17Q] FIRST EXAMINATION REPORT

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1998-10-07 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION)

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