US3754634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic conveyor for molten metal
Assignee: SMS Elotherm GmbH
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Filing: 1970-10-01
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Granted: 1973-08-28
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Expires: 1990-10-01
Abstract
Abstract An electromagnetic conveyor for drawing molten metal from a melting or holding vessel of the type having an inclined trough along which the metal moves and an inductor for generating a travelling electromagnetic field which draws the metal up the trough against gravity. Near the higher end of the trough a gate preferably having an adjustable position is mounted in the trough for controlling the depth of molten metal passing the gate. In a first embodiment, the gate comprises an insulating rail and in a second embodiment the gate is a physical barrier. Preferably heaters are mounted on both sides of the gate and the gate can be positioned at any of a plurality of positions along the trough.
Inventors
- 👤 H Gerbig
- 👤 Starck A Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:08
CPC Classifications
H; H02; H02K; H02K44/00; H02K44/02; H02K44/06; B; B22; B22D; B22D39/00; B22D39/003; B22D39/006; D; D07; D07B; D07B5/00; D07B5/04
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
168 words
In an electromagnetic conveyor for drawing molten metal from a vessel having an inclined trough along which the metal moves, said trough having its lower end terminating in said vessel, and inductor means for generating a travelling electromagnetic fieLd which draws said metal from said vessel in an open stream up said trough against gravity, the improvement comprising an electrically insulating gate valve disposed in said trough so as to extend downwardly from the top of the trough to define an adjusted depth of flow and located between the point of highest elevation of said trough and the point of said trough at which the surface of said metal has an elevation equal to the maximum elevation of the surface of said metal in said vessel for controlling the depth of molten metal passing said gate valve so that the gate valve bottom extends to the level corresponding to desired flow depth and means for adjusting the position of the gate valve bottom to vary desired flow depth.
Claim 2
Dependent Claim
168 words
In an electromagnetic conveyor for drawing molten metal from a vessel having an inclined trough along which the metal moves, said trough having its lower end terminating in said vessel, and inductor means for generating a travelling electromagnetic fieLd which draws said metal from said vessel in an open stream up said trough against gravity, the improvement comprising an electrically insulating gate valve disposed in said trough so as to extend downwardly from the top of the trough to define an adjusted depth of flow and located between the point of highest elevation of said trough and the point of said trough at which the surface of said metal has an elevation equal to the maximum elevation of the surface of said metal in said vessel for controlling the depth of molten metal passing said gate valve so that the gate valve bottom extends to the level corresponding to desired flow depth and means for adjusting the position of the gate valve bottom to vary desired flow depth.
Claim 3
Dependent Claim
35 words
In a conveyor as in claim 1, the further improvement wherein said gate valve is located in the region of the last two poles of said inductor means at the higher end of said trough.
Claim 4
Dependent Claim
79 words
In a conveyor as in claim 1, the further improvement wherein said gate valve includes a gate member disposed in said trough and permitting said metal to flow only underneath it and said adjusting means includes a threaded member attached to said gate member and extending through an aperture in the top of said trough and manually operable means associated with the portion of said threaded member outside said trough for changing the vertical position of said gate member.
Claim 5
Dependent Claim
24 words
In a conveyor as in claim 1, the further improvement wherein said gate means can be disposed at any of a plurality of positions.
Claim 6
Dependent Claim
25 words
In a conveyor as in claim 1, the further improvement including means mounted on each side of said gate valve for heating the flowing metal.
Claim 7
Dependent Claim
76 words
An electromagnetic conveyor trough including an electrically insulating gate valve in the region of the trough center viewed in a transverse cross-section of the trough extending downward from the trough top to define an adjusted flow depth, wherein the distance of the bottom edge of the rail from the bottom of the trough controls the depth of flow of a stream of liquid metal flowing in the said trough in the region of the said rail.
Claim 8
Dependent Claim
76 words
An electromagnetic conveyor trough including an electrically insulating gate valve in the region of the trough center viewed in a transverse cross-section of the trough extending downward from the trough top to define an adjusted flow depth, wherein the distance of the bottom edge of the rail from the bottom of the trough controls the depth of flow of a stream of liquid metal flowing in the said trough in the region of the said rail.
Claim 9
Dependent Claim
24 words
An electromagnetic conveyor trough according to claim 6, in which the said gate valve is disposed parallel to the side walls of the trough.
Claim 10
Dependent Claim
17 words
An electromagnetic conveyor trough according to claim 6, in which the said gate valve is elevationally adjustable.
Claim 11
Dependent Claim
17 words
An electromagnetic conveyor trough according to claim 8, in which the said gate valve is laterally adjustable.
Claim 12
Independent Claim
178 words
A method of controlling the depth and quantity of flow of a stream of liquid metal in an inclined electromagnetic trough flowing from a vessel, which comprises locating an electrically insulating gate valve in said trough so as to extend downwardly from the trough top to define an adjusted depth of flow and between the point of highest elevation of said trough and the point of said trough at which the surface of said metal has an elevation equal to the maximum elevation of the metal surface in said vessel , adjusting the level of the bottom edge of said electrically insulating gate valve disposed so as to extend downwardly from the trough top at or near the center of said conveyor trough viewed in a transverse cross-section of the trough with respect to the bottom of the said trough whereby the depth of flow of the said stream of liquid metal in the region of the said rail is confined to the distance between the bottom of the said rail and the bottom of the said trough.
Claim 13
Independent Claim
178 words
A method of controlling the depth and quantity of flow of a stream of liquid metal in an inclined electromagnetic trough flowing from a vessel, which comprises locating an electrically insulating gate valve in said trough so as to extend downwardly from the trough top to define an adjusted depth of flow and between the point of highest elevation of said trough and the point of said trough at which the surface of said metal has an elevation equal to the maximum elevation of the metal surface in said vessel , adjusting the level of the bottom edge of said electrically insulating gate valve disposed so as to extend downwardly from the trough top at or near the center of said conveyor trough viewed in a transverse cross-section of the trough with respect to the bottom of the said trough whereby the depth of flow of the said stream of liquid metal in the region of the said rail is confined to the distance between the bottom of the said rail and the bottom of the said trough.
Claim 14
Independent Claim
149 words
A method of drawing molten metal from a vessel along an inclined trough having its lower end terminating in said vessel with a travelling electromagnetic field which draws said metal from said vessel in an open stream up said trough against gravity, comprising the steps of locating an electrically insulating gate valve in said trough so as to extend downwardly from the trough top to define an adjusted depth of flow and between the point of highest elevation of said trough, adjusting the depth of molten metal passing a point on said trough with an electrically insulating gate valve disposed so as to extend downwardly from the trough top and between the point of highest elevation of said trough and the point of said trough at which the surface of said metal has an elevation equal to the maximum elevation of the surface of said metal in said vessel.
Claim 15
Independent Claim
149 words
A method of drawing molten metal from a vessel along an inclined trough having its lower end terminating in said vessel with a travelling electromagnetic field which draws said metal from said vessel in an open stream up said trough against gravity, comprising the steps of locating an electrically insulating gate valve in said trough so as to extend downwardly from the trough top to define an adjusted depth of flow and between the point of highest elevation of said trough, adjusting the depth of molten metal passing a point on said trough with an electrically insulating gate valve disposed so as to extend downwardly from the trough top and between the point of highest elevation of said trough and the point of said trough at which the surface of said metal has an elevation equal to the maximum elevation of the surface of said metal in said vessel.
Claim 16
Dependent Claim
14 words
A method as in claim 11, including the further step of adjusting said depth.
Claim 17
Dependent Claim
26 words
A method as in claim 11, including the further step of heating said molten metal as it passes said point at which said depth is controlled.
Claim 18
Dependent Claim
50 words
A method as in claim 11, including the further step of generating said travelling field with a field strength in the region of said point at which said depth is controlled high enough to prevent return flow of metal which has passed said point at which said depth is controlled.
Claim 19
Dependent Claim
149 words
In an electromagnetic conveyor for drawing molten metal from a vessel having an inclined trough along which the metal moves, said trough having its lower end terminating in said vessel, and inductor means for generating a travelling electromagnetic field which draws said metal from said vessel in an open stream up said trough against gravity, the improvement comprising an electrically insulating gate valve in said trough extending parallel to the trough sides and downward from the top of the trough to define an adjusted depth of flow and providing space between said trough sides and said rail and disposed between the point of highest elevation of said trough and the point of said trough at which the surface of said metal has an elevation equal to the maximum elevation of the surface of said metal in said vessel for controlling the depth of molten metal passing said gate valve.
Claim 20
Dependent Claim
149 words
In an electromagnetic conveyor for drawing molten metal from a vessel having an inclined trough along which the metal moves, said trough having its lower end terminating in said vessel, and inductor means for generating a travelling electromagnetic field which draws said metal from said vessel in an open stream up said trough against gravity, the improvement comprising an electrically insulating gate valve in said trough extending parallel to the trough sides and downward from the top of the trough to define an adjusted depth of flow and providing space between said trough sides and said rail and disposed between the point of highest elevation of said trough and the point of said trough at which the surface of said metal has an elevation equal to the maximum elevation of the surface of said metal in said vessel for controlling the depth of molten metal passing said gate valve.
References Cited (Backward Citations)
US3362585A
Cited
US3534886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |