Patent ID: 8859935
Filing Date: 2014-10-14
Classification: B08B

Abstract:
1. A method of preparing a thermocouple having dissimilar leads material utilized in a gas turbine for welding, comprising: positioning said thermocouple, which comprises a first wire and a second wire of dissimilar materials, each wire having an insulating sheath and a magnesium oxide surface contaminant beneath said sheath, said first wire and said second wire being joined at first ends within a probe, adjacent a laser at second ends of at least one of said first wire and said second wire extending from said probe, said first wire and said second wire being KN and KP wire, respectively, wherein said KN wire comprises a negatively polarized Nickel-aluminum-silicon type K thermoelement, and said KP wire comprises a positively polarized Nickel and Chromium type K thermoelement; moving one of said first and second wires and said laser at a speed of at least about 30 inches per second; obliterating said magnesium oxide surface contaminant from said material with said laser.