US3596786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual-purpose welding cable
Assignee: Dover Corp
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Filing: 1968-12-04
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Granted: 1971-08-03
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Expires: 1988-12-04
Abstract
Abstract A dual-purpose welding cable having increased electrode size and welding current capacity without substantially increased cable diameter or weight. A flexible interior electrode conduit and readily removable flexible liner are provided, each in the form of a flexible tube formed of helically wound spring metal strip to have normally butted edges defining a seam which follows a helical path about the axis of the tube.
Inventors
- 👤 Arthur A Bernard
- 👤 Richard A Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:19
CPC Classifications
H; H01; H01B; H01B9/00; H01B9/001; B; B23; B23K; B23K9/00; B23K9/12; B23K9/122; B23K9/16; B23K9/173
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
263 words
Arc-welding apparatus including a welding current power source, a source of consumable electrode, an electrode feeding machine, and an arc-welding gun wherein the improvement comprises: a flexible conduit and a removable flexible liner therein conducting continuous lengths of said consumable electrode from said electrode feeding machine to said arc welding gun, said flexible conduit and said flexible removable liner each in the form of a flexible tube formed of spring metal strip of rectangular cross sectional configuration helically wound to have butted edges defining a seam which follows a helical path about the axis of said tube, said flexible liner having an outside diameter smaller than the internal diameter of said flexible conduit such that said flexible liner is readily insertable and removable into and out of said flexible conduit; a plurality of flexible welding current conductors helically wrapped around said flexible conduit conducting welding current from said welding current power source to said arc welding gun; a flexible tube of electrical insulating material encasing said plurality of welding current conductors; a fitting of electrically conductive material affixed to one end of said flexible conduit and to one end of said plurality of welding current conductors connecting said flexible conduit and said plurality of welding current conductors to said electrode feeding machine and said welding current power source; and a second fitting of electrically conductive material affixed to the opposite end of said flexIble conduit and to the opposite end of said plurality of said welding current conductors connecting said flexible conduit and said plurality of welding current conductors to said arc-welding gun.
Claim 2
Dependent Claim
263 words
Arc-welding apparatus including a welding current power source, a source of consumable electrode, an electrode feeding machine, and an arc-welding gun wherein the improvement comprises: a flexible conduit and a removable flexible liner therein conducting continuous lengths of said consumable electrode from said electrode feeding machine to said arc welding gun, said flexible conduit and said flexible removable liner each in the form of a flexible tube formed of spring metal strip of rectangular cross sectional configuration helically wound to have butted edges defining a seam which follows a helical path about the axis of said tube, said flexible liner having an outside diameter smaller than the internal diameter of said flexible conduit such that said flexible liner is readily insertable and removable into and out of said flexible conduit; a plurality of flexible welding current conductors helically wrapped around said flexible conduit conducting welding current from said welding current power source to said arc welding gun; a flexible tube of electrical insulating material encasing said plurality of welding current conductors; a fitting of electrically conductive material affixed to one end of said flexible conduit and to one end of said plurality of welding current conductors connecting said flexible conduit and said plurality of welding current conductors to said electrode feeding machine and said welding current power source; and a second fitting of electrically conductive material affixed to the opposite end of said flexIble conduit and to the opposite end of said plurality of said welding current conductors connecting said flexible conduit and said plurality of welding current conductors to said arc-welding gun.
Claim 3
Dependent Claim
53 words
The invention defined in claim 1 wherein said flexible conduit is helically wound under back pressure to provide a tube which is inextensible under any tension force less than a predetermined magnitude in order to resist change in length due to tension force developed by the passage of an electrode through said conduit.
Claim 4
Dependent Claim
30 words
The invention defined in claim 1 wherein said rectangular cross sectional configuration of said spring metal strip is slightly dished inwardly of said flexible tube formed by said helical winding.
Claim 5
Dependent Claim
62 words
The invention as set forth in claim 1 wherein in both said flexible conduit and said flexible liner the width of said metal strip is not less than 70 percent of the inside diameter of the tube into which it is formed and the thickness of said metal strip is not greater than 40 percent of the width of said metal strip.
Claim 6
Dependent Claim
243 words
Arc-welding apparatus including a welding current power source, a source of consumable electrode, an electrode feeding machine, and an arc-welding gun for gas-shielded arc welding having a handle portion with an electrically conductive tubular portion extending from said handle portion and carrying a removable head assembly at its forward end, the head assembly including an electrically conductive head member with an attached welding current contact tip wherein the improvement comprises: a flexible conduit; a first fitting at one end of said flexible conduit for attachment to said electrode-feeding machine; a second fitting at the opposite end of said flexible conduit for attachment to said tubular portion, said flexible conduit and said tubular portion cooperating by serial alignment of their respective bores to form a continuous electrode passageway extending from said electrode feeding machine through said flexible conduit and through said tubular portion to said head member; and a removable flexible liner having a bushing affixed to one end thereof, said bushing having peripheral channels and being slidably received within said head member for centering said flexible liner relative to said head member bore, said flexible liner being slidably retained within said flexible conduit solely by a forward thrust abutment of said bushing against said head member, said flexible liner being freely removable from said passageway be detaching said head member containing said abutment, grasping said bushing, and withdrawing said flexible liner from the forward end of said tubular portion of the welding gun.
Claim 7
Dependent Claim
243 words
Arc-welding apparatus including a welding current power source, a source of consumable electrode, an electrode feeding machine, and an arc-welding gun for gas-shielded arc welding having a handle portion with an electrically conductive tubular portion extending from said handle portion and carrying a removable head assembly at its forward end, the head assembly including an electrically conductive head member with an attached welding current contact tip wherein the improvement comprises: a flexible conduit; a first fitting at one end of said flexible conduit for attachment to said electrode-feeding machine; a second fitting at the opposite end of said flexible conduit for attachment to said tubular portion, said flexible conduit and said tubular portion cooperating by serial alignment of their respective bores to form a continuous electrode passageway extending from said electrode feeding machine through said flexible conduit and through said tubular portion to said head member; and a removable flexible liner having a bushing affixed to one end thereof, said bushing having peripheral channels and being slidably received within said head member for centering said flexible liner relative to said head member bore, said flexible liner being slidably retained within said flexible conduit solely by a forward thrust abutment of said bushing against said head member, said flexible liner being freely removable from said passageway be detaching said head member containing said abutment, grasping said bushing, and withdrawing said flexible liner from the forward end of said tubular portion of the welding gun.
Claim 8
Dependent Claim
51 words
The invention as set forth in claim 5 wherein said flexible conduit and said removable liner are each in the form of a flexible tube formed of spring metal strip helically wound to have butted edges defining a seam which follows a helical path about the axis of said flexible tube.
Claim 9
Dependent Claim
49 words
The invention defined in claim 5 wherein said flexible liner is in the form of a flexible tube formed by a spring metal strip of rectangular cross sectional configuration helically wound to have butted edges defining a seam which follows the helical path about the axis of said tube.
Claim 10
Dependent Claim
20 words
The invention defined in claim 7 wherein said rectangular cross sectional configuration is slightly dished inwardly of said flexible tube.
Claim 11
Dependent Claim
234 words
Arc-welding apparatus including a welding current power source, a source of consumable electrode, an electrode feeding machine, and an arc-welding gun wherein the improvement comprises: a flexible tube formed of spring metal strip of rectangular cross sectional configuration helically wound to have butted edges defining a seam which follows a helical path about the axis of said tube, said spring metal strip being helically wound under back pressure to provide a tube which is inextensible under any tension force less than a predetermined magnitude in order to resiSt change in length due to tension force developed by the passage of an electrode through said flexible conduit; a plurality of flexible welding current conductors helically wrapped around said flexible tube conducting welding current from said power source to said arc-welding gun; an outer jacket of insulating material encasing said plurality of welding current conductors; a fitting of electrically conductive material affixed to one end of said flexible tube and to one end of said plurality of welding current conductors connecting said flexible tube and said plurality of welding current conductors to said electrode feeding machine and said welding current power source; and a second fitting of electrically conductive material affixed to the opposite end of said flexible tube and to the opposite end of said plurality of welding current conductors connecting said flexible tube and said plurality of welding current conductors to said arc-welding gun.
Claim 12
Dependent Claim
234 words
Arc-welding apparatus including a welding current power source, a source of consumable electrode, an electrode feeding machine, and an arc-welding gun wherein the improvement comprises: a flexible tube formed of spring metal strip of rectangular cross sectional configuration helically wound to have butted edges defining a seam which follows a helical path about the axis of said tube, said spring metal strip being helically wound under back pressure to provide a tube which is inextensible under any tension force less than a predetermined magnitude in order to resiSt change in length due to tension force developed by the passage of an electrode through said flexible conduit; a plurality of flexible welding current conductors helically wrapped around said flexible tube conducting welding current from said power source to said arc-welding gun; an outer jacket of insulating material encasing said plurality of welding current conductors; a fitting of electrically conductive material affixed to one end of said flexible tube and to one end of said plurality of welding current conductors connecting said flexible tube and said plurality of welding current conductors to said electrode feeding machine and said welding current power source; and a second fitting of electrically conductive material affixed to the opposite end of said flexible tube and to the opposite end of said plurality of welding current conductors connecting said flexible tube and said plurality of welding current conductors to said arc-welding gun.
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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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |