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Title: US4002878: Gas tungsten arc welding electrode
[ Derwent Title ]

Country: US United States of America

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7 pages

Inventor: Disney, John A.; Orem, UT

Assignee: Utah State University Foundation, Logan, UT
other patents from UTAH STATE UNIVERSITY FOUNDATION (602120) (approx. 69)
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Published / Filed: 1977-01-11 / 1975-07-25

Application Number: US1975000599216

IPC Code: Advanced: B23K 9/167; B23K 9/29; B23K 10/02; B23K 35/02;
Core: B23K 9/24; more...
IPC-7: B23K 9/24;

ECLA Code: B23K9/167; B23K9/29G6; B23K10/02; B23K35/02B;

U.S. Class: Current: 219/121.45; 219/075; 219/121.11; 219/121.52; 219/145.21; 313/231.31; 0D8/030;
Original: 219/121.P; 219/075; 219/121.R; 219/145; 313/231.3;

Field of Search: 219/121 P,121 R,74,75,76,145 313/231.3

Priority Number:
1975-07-25  US1975000599216

Abstract:     An improved electrode and electrode working tip for a gas tungsten arc welding apparatus. The face of the working tip of the electrode is formed as a narrow ring coaxial with the electrode and having an area less than the area of electron emission for the operating currents of the electrode. The reduced area of the narrow annular ring forces the area of electron emission to spread to the immediately adjacent walls. The improved electrode working tip provides a more stable and uniform plasma of reduced diameter for improved precision and repeatability in welds which is the ability to consistently reproduce welding parameters. The electrode tip also has a significantly increased working life.

Attorney, Agent or Firm: Workman, H. Ross ; Young, J. Winslow ;

Primary / Asst. Examiners: Truhe, J. V.; Herkamp, N.D.

Family: None

First Claim:
Show all 11 claims
What is claimed and desired to be secured by United States Letters Patent is:     1. An electrode for use in an inert gas arc welding apparatus having an electrode supplied with power to form a welding arc plasma, the face of the working tip of the electrode comprising a narrow annular ring, the center of the narrow ring being coincident with the axis of the electrode, the surface area of the narrow ring being less than an annular surface formed between a first diameter and a second diameter, the first diameter being equal to 50% of the diameter of the electrode and the second diameter being equal to the diameter of the electrode, the surface area of the narrow annular ring being less than the area of electron emission for the plasma without exceeding the current limitation for the electrode thereby forcing the area of electron emission for the plasma to spread to electrode surface area adjacent the narrow annular ring.

Background / Summary: Show background / summary

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Description: Show description

Forward References: Show 4 U.S. patent(s) that reference this one

U.S. References: Go to Result Set: All U.S. references   |  Forward references (4)   |   Backward references (9)   |   Citation Link

Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 3pp US3027446  1962-03 Browning   Arc torch
Get PDF - 3pp US3076085* 1963-01 Sundstrom    
Get PDF - 2pp US3131288* 1964-04 Browning    
Get PDF - 3pp US3246115* 1966-04 Johnson    
Get PDF - 8pp US3343027* 1967-09 Frohlich    
Get PDF - 3pp US3471675  1969-10 Sargent et al.   ARC TORCH
Get PDF - 5pp US3569661  1971-03 Ebeling, Jr. et al.  Air Products and Chemicals, Inc. METHOD AND APPARATUS FOR ESTABLISHING A CATHODE STABILIZED (COLLIMATED) PLASMA ARC
Get PDF - 5pp US3676639  1972-07 Esiban et al.  Institut Elektrosvariimeni E. O. Patona NON-CONSUMABLE ELECTRODE FOR ELECTRIC-ARC PROCESS
  * some details unavailable
Foreign References: None

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