EP 0335617 A2 19891004 - Current source limitation for thick film heating elements.
Title (en)
Current source limitation for thick film heating elements.
Title (de)
Strombegrenzung bei Dickschichtfilmheizelementen.
Title (fr)
Limitateur de courant pour éléments chauffants à couche épaisse.
Publication
Application
Priority
GB 8807139 A 19880325
Abstract (en)
A heating element (1) comprises a plurality of thick film electrically resistive tracks (2, 4, 6), of which at least one has a temperature coefficient of resistance in excess of 0.006 per degree C. A first track (2) is for electrical connection to a power supply. Means (12, 14) for electrically connecting the first track (2) to a second track (4, 6) comprise a component which depends on temperature such that, in use, the current flowing in the second track (4, 6) increases with the temperature of the first track (2).
IPC 1-7
IPC 8 full level
CPC (source: EP)
H05B 3/26 (2013.01); H05B 3/748 (2013.01); H05B 2203/002 (2013.01); H05B 2203/005 (2013.01); H05B 2203/013 (2013.01); H05B 2203/017 (2013.01); H05B 2203/019 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0335617 A2 19891004; EP 0335617 A3 19910320; EP 0335617 B1 19931201; AT E98082 T1 19931215; DE 68911008 D1 19940113; DE 68911008 T2 19940616; GB 8807139 D0 19880427
DOCDB simple family (application)
EP 89302961 A 19890323; AT 89302961 T 19890323; DE 68911008 T 19890323; GB 8807139 A 19880325