EP 0468203 A1 19920129 - Device for protection of electrical heated vacuum furnace.
Title (en)
Device for protection of electrical heated vacuum furnace.
Title (de)
Einrichtung zum Schutz elektrisch beheizter Vakuumöfen.
Title (fr)
Appareil pour la protection de fours à vide à chauffage électrique.
Publication
Application
Priority
DE 4020818 A 19900629
Abstract (en)
[origin: JPH04227472A] PURPOSE: To provide a protector taking a appropriate measure for protecting a facility by detecting gaseous discharge in an electrically heated vacuum furnace. CONSTITUTION: An electrically heated vacuum furnace is provided with special lead-through devices 3 for transmitting current to the heating elements 4. In place of recognizing gas discharges which can occur between a lead-through 3 and a tank wall 1 directly, an auxiliary electrode 7 surrounding the insulation 6 of the lead through is provided and short circuit between the auxiliary electrode 7 and tank wall 1 is detected by means of a safety resistor detector, or the like. A thermocouple may be substituted for the surrounding auxiliary electrode.
Abstract (de)
Ein elektrisch beheizter Vakuumofen ist mit speziellen Durchführungen (3) zur Übertragung von Strom zu Heizelementen (4) versehen. Um Gasentladungen, welche zwischen einer Durchführung und der Kesselwand (1) stattfinden können, zu erkennen, ist die Isolation (6) der Durchführung von einer Hilfselektrode (7) umgeben. Anstelle einer Hilfselektrode kann auch ein Thermoelement verwendet werden. <IMAGE>
IPC 1-7
IPC 8 full level
F27D 11/02 (2006.01); F27D 21/00 (2006.01); H05B 3/00 (2006.01); H05B 3/62 (2006.01)
CPC (source: EP US)
F27D 11/02 (2013.01 - EP US); F27D 21/00 (2013.01 - EP US); H05B 3/62 (2013.01 - EP US); F27D 2021/0071 (2013.01 - EP US)
Citation (search report)
- [A] DE 1565534 A1 19720302 - FINKL CHARLES W, et al
- [A] DE 3228471 A1 19840209 - DEHN & SOEHNE [DE]
- [A] DD 120275 A1 19760605
Designated contracting state (EPC)
AT BE CH DE DK FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0468203 A1 19920129; DE 4107096 A1 19920102; DE 9116930 U1 19950202; JP H04227472 A 19920817; US 5193100 A 19930309
DOCDB simple family (application)
EP 91110222 A 19910621; DE 4107096 A 19910306; DE 9116930 U 19910306; JP 10141191 A 19910507; US 71880891 A 19910621