US3555238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent arc shield
Assignee: KSM Fastening Systems Inc
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Filing: 1967-04-26
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Granted: 1971-01-12
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Expires: 1987-04-26
Abstract
Abstract Permanent arc shields, both internal and external, together with attachments associated therewith for use in conjunction with electrical arc welding apparatus suitable for welding studs and spuds to a workpiece. The external permanent arc shield is used externally of the member being welded and is secured to the welding apparatus by means of an arc shield attachment or cooling jacket and includes a peripheral molding chamber in one end thereof which is disposed around the member being welded to provide a shield and mold. The internal arc shield is adapted for use in welding spuds to a workpiece, and is disposed interiorly of the spud to provide an internal molding chamber therein. The permanent arc shields are of a composition such that they may be used for repeated welds. They may be formed of boron nitride material and/or force cooled.
Inventors
- 👤 Elliott J Fay
- 👤 Ralph K Ritter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:17
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/20; B23K9/201; B23K9/202
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
A permanent arc shield combination for use in attaching a hollow welding stud to a workpiece comprising: A first member of refractory material having a bore therethrough. One portion of said bore having a cross section only enough larger than the stud to permit the stud to pass freely therethrough. The bore at one end thereof being slightly enlarged to provide a narrow exterior peripheral molding chamber around the end of the stud; and A second member formed of refractory material having a configuration corresponding to the interior of the hollow welding stud but dimensioned to pass freely therethrough to provide an internal molding chamber within the hollow member.
Claim 2
Dependent Claim
109 words
A permanent arc shield combination for use in attaching a hollow welding stud to a workpiece comprising: A first member of refractory material having a bore therethrough. One portion of said bore having a cross section only enough larger than the stud to permit the stud to pass freely therethrough. The bore at one end thereof being slightly enlarged to provide a narrow exterior peripheral molding chamber around the end of the stud; and A second member formed of refractory material having a configuration corresponding to the interior of the hollow welding stud but dimensioned to pass freely therethrough to provide an internal molding chamber within the hollow member.
Claim 3
Dependent Claim
132 words
In combination for welding the end of a hollow welding stud to a workpiece and for confining the molten metal and welding flash to the proximity of the weld comprising: a stud welding gun; a first arc shield having a narrow peripheral exterior molding chamber adapted to be disposed in shielding relationship to the workpiece of the welding end of said hollow stud; a second arc shield having a configuration corresponding to the interior of the hollow stud but dimensioned to pass freely therethrough, said second arc shield providing an interior molding chamber within said hollow stud during welding thereof; and means associated with said welding gun for securing said first and second arc shield to said welding gun for withdrawal from shielding relationship with said hollow stud following the welding operation.
Claim 4
Dependent Claim
132 words
In combination for welding the end of a hollow welding stud to a workpiece and for confining the molten metal and welding flash to the proximity of the weld comprising: a stud welding gun; a first arc shield having a narrow peripheral exterior molding chamber adapted to be disposed in shielding relationship to the workpiece of the welding end of said hollow stud; a second arc shield having a configuration corresponding to the interior of the hollow stud but dimensioned to pass freely therethrough, said second arc shield providing an interior molding chamber within said hollow stud during welding thereof; and means associated with said welding gun for securing said first and second arc shield to said welding gun for withdrawal from shielding relationship with said hollow stud following the welding operation.
Claim 5
Dependent Claim
138 words
In the art of stud welding including a stud welding gun, a stud carried by the welding gun for welding to a workpiece by the stud end welding technique and an arc shield surrounding the juncture of the stud and workpiece for confining the resultant molten metal and forming a weld base fillet, the improvements in said arc shield comprising: an elongate arc shield of refractory material having a bore therethrough, one portion of said bore having a cross section only enough larger than the stud to permit the stud to pass free therethrough, the bore at one end of the member being slightly enlarged to provide a narrow peripheral molding chamber around the welding end of the arc shield; and a cooling jacket in contact with and surrounding said arc shield for force cooling the arc shield.
Claim 6
Dependent Claim
138 words
In the art of stud welding including a stud welding gun, a stud carried by the welding gun for welding to a workpiece by the stud end welding technique and an arc shield surrounding the juncture of the stud and workpiece for confining the resultant molten metal and forming a weld base fillet, the improvements in said arc shield comprising: an elongate arc shield of refractory material having a bore therethrough, one portion of said bore having a cross section only enough larger than the stud to permit the stud to pass free therethrough, the bore at one end of the member being slightly enlarged to provide a narrow peripheral molding chamber around the welding end of the arc shield; and a cooling jacket in contact with and surrounding said arc shield for force cooling the arc shield.
Claim 7
Dependent Claim
23 words
The improved arc shield of claim 3 in which said cooling jacket includes internal passages therein for circulation of a liquid cooling fluid.
Claim 8
Dependent Claim
27 words
The improved arc shield of claim 3 wherein the cooling jacket is supported by the welding gun and the arc shield is carried by the cooling jacket.
Claim 9
Dependent Claim
50 words
The arc shield of claim 5 wherein both the external surface of the arc shield and the internal surface of the cooling jacket have a corresponding taper throughout the extent of their contact to provide mating heat transfer relationship and positive securement of the arc shield within the cooling jacket.
References Cited (Backward Citations)
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Cited
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US3277269A
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |