Electrode with brazed separator and method of making same

(19)

(11)

EP 1 202 614 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	23.06.2004 Bulletin 2004/26

(43)	Date of publication A2:
	02.05.2002 Bulletin 2002/18

(21)	Application number: 01308236.7

(22)	Date of filing: 27.09.2001

(51)	International Patent Classification (IPC)⁷: H05H 1/34

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

24.10.2000 US 694962
16.04.2001 US 835698

(71)	Applicant: The Esab Group, Inc.
	Florence, South Carolina 29501 (US)

(72)	Inventors:
	Quian, Ding Alpharetta, Georgia 30005 (US) Turner, Tommie Zack Darlington, South Carolina 29532 (US) Lynch, Rue Allen Florence, South Carolina 29501 (US) Stokes, Larry Wade Timmonsville, South Carolina 29161 (US)

(74)	Representative: MacDougall, Donald Carmichael et al
	Cruikshank & Fairweather 19 Royal Exchange Square Glasgow G1 3AE, Scotland Glasgow G1 3AE, Scotland (GB)

(54)	Electrode with brazed separator and method of making same

(57) An electrode for a plasma arc torch and method of fabricating the same are disclosed, and wherein the electrode comprises a copper holder defining two coaxial cavities. An emissive element is secured to one of the cavities and serves as the cathode terminal for the arc during operation. A relatively non-emissive separator is disposed about the emissive element within the other cavity, and acts to separate the copper holder and the emissive element, as well as resisting detachment of the arc from the emissive element and attachment to the copper holder.

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