EP 0348716 A3 19910403 - THERMAL SWITCH
Title (en)
THERMAL SWITCH
Publication
Application
Priority
- DE 3821495 A 19880625
- DE 3821496 A 19880625
Abstract (en)
[origin: EP0348716A2] A thermal switch, serving especially as a temperature limiter for a radiant heating body (11) for heating a glass-ceramic plate (12), has radiant heaters (13, 14). Its bar-shaped temperature sensor (20) has an expansion bar (24) which is located in a tube (25) serving as a reference and which can consist of a chromium/iron/aluminium alloy and is heat-treated above 1100 DEG C. The tube (25) can consist of a radiation-absorbing material or is coated with such, for example cordierite, non-transmissive glass ceramic or vitreous silica. Both measures ensure that the thermal switch has an increased switching amplitude and therefore a reduced switching frequency. <IMAGE>
IPC 1-7
IPC 8 full level
H05B 1/02 (2006.01); H05B 3/74 (2006.01); H01H 37/48 (2006.01)
CPC (source: EP US)
H05B 1/0216 (2013.01 - EP US); H05B 3/742 (2013.01 - EP US); H01H 37/48 (2013.01 - EP US)
Citation (search report)
- [X] GB 2192279 A 19880106 - MICROPORE INTERNATIONAL LTD
- [X] DE 3440156 A1 19850515 - ELECTROVAC [AT]
- [E] DE 3817113 A1 19891130 - EGO ELEKTRO BLANC & FISCHER [DE]
- [A] DE 2839161 A1 19800320 - EGO REGELTECH
- [AD] US 3926648 A 19751216 - MILLER DAVID M
Designated contracting state (EPC)
AT CH DE ES FR GB GR IT LI SE
DOCDB simple family (publication)
EP 0348716 A2 19900103; EP 0348716 A3 19910403; EP 0348716 B1 19950201; AT E118144 T1 19950215; DE 58908957 D1 19950316; ES 2066805 T3 19950316; US 5055819 A 19911008
DOCDB simple family (application)
EP 89110509 A 19890610; AT 89110509 T 19890610; DE 58908957 T 19890610; ES 89110509 T 19890610; US 62623790 A 19901212