EP 1061781 A2 20001220 - Method for providing the electric arc starting point in the electrode of a plasma cutting torch, and electrode thus provided
Title (en)
Method for providing the electric arc starting point in the electrode of a plasma cutting torch, and electrode thus provided
Title (de)
Verfahren zur Erzeugung des Startpunktes vom Lichtbogen in der Elektrode eines Plasma-Schneidbrenners, und Elektrode dazu
Title (fr)
Procédé de réalisation du point de démarrage de l'arc électrique dans l'électrode d'une torche de coupage par plasma, et électrode correspondante
Publication
Application
Priority
IT BO990319 A 19990614
Abstract (en)
A method for providing the starting point of an electric arc in an electrode (1) of a thermal plasma cutting torch, comprising the steps of: forming a substantially cylindrical axial seat (3) in the electrode (1), at the end from which the electric arc must start, the seat (3) being adapted to receive, with tolerance, a substantially cylindrical insert (4) made of hafnium or zirconium, and heading the insert (4) inside the seat (3) so as to produce a stable and uniform intimate contact of its outer surface with the inner surface of the seat (3) which is adapted to firmly retain the insert (4) in the seat (3). <IMAGE>
IPC 1-7
IPC 8 full level
H05H 1/34 (2006.01)
CPC (source: EP US)
H05H 1/34 (2013.01 - EP US); H05H 1/3442 (2021.05 - EP)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 1061781 A2 20001220; EP 1061781 A3 20021016; IT 1309290 B1 20020122; IT BO990319 A0 19990614; IT BO990319 A1 20001214
DOCDB simple family (application)
EP 00110980 A 20000529; IT BO990319 A 19990614