Patent US3649733A successfully refreshed from Google Patents.
US3649733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugally cleaned arc furnace electrode wheel
Assignee: Individual
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Filing: 1970-07-17
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Granted: 1972-03-14
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Expires: 1990-07-17
Abstract
Abstract An arc furnace having an electrode wheel which is rotated at a sufficient speed to prevent vaporized or sputtered melt material from adhering thereto. The rotational speed of the electrode wheel may be maintained at a low enough level to permit adherence of vaporized or sputtered melt material to the lower face of the electrode wheel while preventing adherence on the sidewalls of the electrode wheel, thus forming an insulating protective shield on the lower face. Furthermore, the lower face of the electrode wheel may be suitably shaped to enhance or detract from the centrifugal effects imparted to the vaporized or sputtered melt material thereon, in order to achieve a desired amount of adherence thereto.
Inventors
- 👤 Max P Schlienger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:19
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/06; H05B7/08; F; F27; F27D; F27D11/00; F27D11/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
133 words
In a melting and casting arc furnace of the type having an enclosed housing forming a controlled ambient atmosphere, a crucible mounted in said housing in which conductive meltable material is to be melted and a rotating nonconsumable electrode wheel in which an arc is drawn between the wheel and the conductive meltable material in the crucible, the improvement comprising: said electrode wheel being formed with a lower face disposed in spaced relation to the consumable material and having sidewalls extending upwardly from said lower face, means rotating said electrode wheel at a sufficient rate to substantially prevent vaporized or sputtered melt material from adhering to said sidewalls, and said lower face having a substantially conical recess central thereto in which vaporized or sputtered melt material is retained during rotation of said wheel.
Claim 2
Dependent Claim
133 words
In a melting and casting arc furnace of the type having an enclosed housing forming a controlled ambient atmosphere, a crucible mounted in said housing in which conductive meltable material is to be melted and a rotating nonconsumable electrode wheel in which an arc is drawn between the wheel and the conductive meltable material in the crucible, the improvement comprising: said electrode wheel being formed with a lower face disposed in spaced relation to the consumable material and having sidewalls extending upwardly from said lower face, means rotating said electrode wheel at a sufficient rate to substantially prevent vaporized or sputtered melt material from adhering to said sidewalls, and said lower face having a substantially conical recess central thereto in which vaporized or sputtered melt material is retained during rotation of said wheel.
Claim 3
Dependent Claim
154 words
In a melting and casting arc furnace of the type having an enclosed housing forming a controlled ambient atmosphere, a crucible mounted in said housing in which conductive meltable material is to be melted and a rotating nonconsumable electrode wheel in which an arc is drawn between the wheel and the conductive meltable material in the crucible, the improvement comprising: said electrode wheel being formed with a lower face disposed in spaced relation to the consumable material and having sidewalls extending upwardly from said lower face, means rotating said electrode wheel at a sufficient rate to substantially prevent vaporized or sputtered material from adhering to said sidewalls, said lower face having an inverted truncated conical recess central thereto, and said rate of rotation being of a low enough level to allow some adherence of the vaporized or sputtered material on said lower face to form a heat insulating protective shield on said lower face.
Claim 4
Dependent Claim
154 words
In a melting and casting arc furnace of the type having an enclosed housing forming a controlled ambient atmosphere, a crucible mounted in said housing in which conductive meltable material is to be melted and a rotating nonconsumable electrode wheel in which an arc is drawn between the wheel and the conductive meltable material in the crucible, the improvement comprising: said electrode wheel being formed with a lower face disposed in spaced relation to the consumable material and having sidewalls extending upwardly from said lower face, means rotating said electrode wheel at a sufficient rate to substantially prevent vaporized or sputtered material from adhering to said sidewalls, said lower face having an inverted truncated conical recess central thereto, and said rate of rotation being of a low enough level to allow some adherence of the vaporized or sputtered material on said lower face to form a heat insulating protective shield on said lower face.
Claim 5
Dependent Claim
21 words
Apparatus according to claim 2 wherein said lower face has an annular protuberant lip adjacent to the perimeter of said recess.
Claim 6
Dependent Claim
22 words
Apparatus according to claim 2 wherein said lower face further includes a plurality of protuberances disposed adjacent the perimeter of said recess.
Claim 7
Independent Claim
118 words
A method of maintaining a rotating electrode wheel free of accumulation of sputtered and vaporized material in a melting and casting furnace of the type having an enclosed housing forming a controlled ambient atmosphere, a crucible mounted in said housing in which conductive meltable material is to be melted and a rotating nonconsumable electrode wheel in which an arc is drawn between the wheel and the conductive meltable material in the crucible having the steps of drawing an arc between said conductive material and said electrode wheel and rotating said electrode wheel at a sufficient rate to cause centrifugal forces generated by the rotational velocity of the wheel to force vaporized or sputtered melt material from the wheel.
Claim 8
Independent Claim
118 words
A method of maintaining a rotating electrode wheel free of accumulation of sputtered and vaporized material in a melting and casting furnace of the type having an enclosed housing forming a controlled ambient atmosphere, a crucible mounted in said housing in which conductive meltable material is to be melted and a rotating nonconsumable electrode wheel in which an arc is drawn between the wheel and the conductive meltable material in the crucible having the steps of drawing an arc between said conductive material and said electrode wheel and rotating said electrode wheel at a sufficient rate to cause centrifugal forces generated by the rotational velocity of the wheel to force vaporized or sputtered melt material from the wheel.
Claim 9
Independent Claim
163 words
A method of maintaining a rotating electrode wheel free of accumulation of sputtered and vaporized material in a melting and casting furnace of the type having an enclosed housing forming a controlled ambient atmosphere, a crucible mounted in said housing in which conductive meltable material is to be melted and a rotating nonconsumable electrode wheel in which an arc is drawn between the wheel and the conductive meltable material in the crucible, said electrode wheel being formed with a lower face disposed in spaced relation to the consumable material and outer sidewalls extending upwardly from said lower face, comprising the steps of drawing an arc between said conductive material and said electrode wheel and rotating said electrode wheel at a sufficient rate to cause vaporized or sputtered melt materials from adhering to said outer sidewalls, said rate of rotation of said electrode wheel being sufficient to impart at least one-half G per unit mass centrifugal force to the outer sidewalls of said wheel.
Claim 10
Independent Claim
163 words
A method of maintaining a rotating electrode wheel free of accumulation of sputtered and vaporized material in a melting and casting furnace of the type having an enclosed housing forming a controlled ambient atmosphere, a crucible mounted in said housing in which conductive meltable material is to be melted and a rotating nonconsumable electrode wheel in which an arc is drawn between the wheel and the conductive meltable material in the crucible, said electrode wheel being formed with a lower face disposed in spaced relation to the consumable material and outer sidewalls extending upwardly from said lower face, comprising the steps of drawing an arc between said conductive material and said electrode wheel and rotating said electrode wheel at a sufficient rate to cause vaporized or sputtered melt materials from adhering to said outer sidewalls, said rate of rotation of said electrode wheel being sufficient to impart at least one-half G per unit mass centrifugal force to the outer sidewalls of said wheel.
Claim 11
Dependent Claim
78 words
In a melting and casting furnace of the type employing a rotating electrode wheel in arc spaced relationship to a melt, the method of positioning said wheel so that one segment of the rotating wheel is in arc generating relationship to the melt and rotating said wheel at a sufficient velocity to cause centrifugal force to throw off vaporized or sputtered melt material during the period said wheel is generating an arc between the wheel and the melt.
Claim 12
Dependent Claim
78 words
In a melting and casting furnace of the type employing a rotating electrode wheel in arc spaced relationship to a melt, the method of positioning said wheel so that one segment of the rotating wheel is in arc generating relationship to the melt and rotating said wheel at a sufficient velocity to cause centrifugal force to throw off vaporized or sputtered melt material during the period said wheel is generating an arc between the wheel and the melt.
References Cited (Backward Citations)
US3398229A
Cited
US3420939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |