Global patent index - EP 1027558 A1

EP 1027558 A1 2000-08-16 - A SAFETY CUT-OFF DEVICE

Title (en)

A SAFETY CUT-OFF DEVICE

Title (de)

SICHERHEITSSTOPVORRICHTUNG

Title (fr)

DISPOSITIF A ARRET DE SECURITE

Publication

EP 1027558 A1 (EN)

Application

EP 97938808 A

Priority

DK 9700366 W

Abstract (en)

[origin: WO9911979A1] Safety cut-off devices using a thermoelectric voltage generated by a sensor in a flame are known. As long as the flame heats the sensor it generates a holding current for a magnetic valve. When the sensor cools down due to loss of flame, the valve closes as the holding current disappears. Such safety devices have a long time constant so that too much gas escapes after the flame has extinguished. The invention provides for a sensor with a small time constant which by means of a transistor controls a current generated by a series connection of thermoelements. In this manner a safer device is obtained.

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

F23N 5/10; F23D 14/72; F24C 3/12

IPC 8 full level (invention and additional information)

F23D 14/72 (2006.01); F23N 5/10 (2006.01); F24C 3/12 (2006.01)

CPC (invention and additional information)

F23N 5/102 (2013.01); F23D 14/72 (2013.01); F24C 3/126 (2013.01)

Citation (search report)

See references of WO 9911979A1

Designated contracting state (EPC)

DE DK ES IT

EPO simple patent family

WO 9911979 A1 19990311; AU 4113097 A 19990322; DE 69710229 D1 20020314; DE 69710229 T2 20021024; DK 1027558 T3 20020506; EP 1027558 A1 20000816; EP 1027558 B1 20020130; ES 2171990 T3 20020916

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