Welding arc initiator

Patent · Sat Dec 31 23:00:00 EST 1988

OSTI ID:866957

Correy, Thomas B ^[1]

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1. Richland, WA

An improved inert gas shielded tungsten arc welder is disclosed of the type wherein a tungsten electrode is shielded within a flowing inert gas, and, an arc, following ignition, burns between the energized tungsten electrode and a workpiece. The improvement comprises in combination with the tungsten electrode, a starting laser focused upon the tungsten electrode which to ignite the electrode heats a spot on the energized electrode sufficient for formation of a thermionic arc. Interference problems associated with high frequency starters are thus overcome.

• Research Organization: BATTELLE MEMORIAL INSTITUTE
• DOE Contract Number: AC06-76RL01830
• Assignee: Battelle Memorial Institute (Columbus, OH)
• Patent Number(s): US 4829153
• OSTI ID: 866957
• Country of Publication: United States
• Language: English

Related Subjects

/219/
associated
burns
combination
comprises
disclosed
electrode
energized
flowing
flowing inert
focused
following
formation
frequency
gas
heats
ignite
ignition
improved
improved inert
improvement
improvement comprises
inert
inert gas
initiator
interference
laser
laser focus
overcome
shielded
spot
starters
starting
sufficient
thermionic
tungsten
tungsten electrode
type
welder
welding
workpiece