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Self Grounding TIG Welding Torch

IP.com Disclosure Number: IPCOM000091699D
Original Publication Date: 1968-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Fletcher, AT: AUTHOR [+3]

Abstract

This tungsten inert gas TIG welding torch is adapted and miniaturized for use in making welds on electronic components. Torch TIG includes electrode 1 composed of nonconsumable material, such as thoriated tungsten, mounted within adjustable collette 2. Cylinder 3 contains inert gas, such as argon, which is fed to TIG by gas tube 4 and then passed through the torch body and allowed to dissipate in the area of electrode 1 and ceramic shield 5. Power supply 6 provides current to electrode 1 by line 7.

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Self Grounding TIG Welding Torch

This tungsten inert gas TIG welding torch is adapted and miniaturized for use in making welds on electronic components. Torch TIG includes electrode 1 composed of nonconsumable material, such as thoriated tungsten, mounted within adjustable collette 2. Cylinder 3 contains inert gas, such as argon, which is fed to TIG by gas tube 4 and then passed through the torch body and allowed to dissipate in the area of electrode 1 and ceramic shield 5. Power supply 6 provides current to electrode 1 by line 7.

This torch includes a self-grounding feature. Fixed jaw 8 and movable jaw 9 are conductively connected by collar 10 which is, in turn, grounded by line 11. The latter serves as a current return path to power supply 6. In addition to providing an electric return path for the welding current, jaws 8 and 9 also hold parts in contact while welding and, due to their bulk as compared to a small component, provide heat-sink action. This confines the welding bead and heat- affected zone to a small area. Movable jaw 9 is connected to trigger lever 12 which is pivotably mounted within the torch housing. Jaw 9 is normally urged into closed relationship with jaw 8 by springs 13.

In operation, depression of lever 12 causes jaw 9 to pivot away from jaw 8, thus allowing the insertion of a to-be-welded work piece between jaws 8 and 9. Release of lever 12 allows jaw 9 to close upon the work piece. Welding action is initiated by starter mechanism 14 whic...