US3632229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dosing of liquid metals, especially from melting or heat preserving containers by means of an electromagnetic conveying trough
Assignee: SMS Elotherm GmbH
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Filing: 1970-04-20
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Granted: 1972-01-04
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Expires: 1990-04-20
Abstract
Abstract A method and apparatus for conveying molten metals up an inclined trough from a vessel by producing a travelling electromagnetic wave beneath the trough wherein the field strength of the wave is increased into a particular range in which substantial variations in field strength do not result in substantial variations in the thickness of the flow layer. The layer thickness in this range can be varied by varying the frequency of the three phase signal used to generate the electromagnetic wave or by varying the gradient of the trough with respect to the horizontal.
Inventors
- 👤 Axel Vonstarck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:34
CPC Classifications
B; B22; B22D; B22D39/00; B22D39/003; B22D39/006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
A method of metering molten metals by means of an electromagnetic conveyor trough having means for producing a travelling electromagnetic wave for causing said metals to move up an inclined trough body against gravity in an open stream including the step of generating said wave with its field strength in a range such that substantial variations in said field strength do not cause substantial variations in the thickness of said stream.
Claim 2
Independent Claim
71 words
A method of metering molten metals by means of an electromagnetic conveyor trough having means for producing a travelling electromagnetic wave for causing said metals to move up an inclined trough body against gravity in an open stream including the step of generating said wave with its field strength in a range such that substantial variations in said field strength do not cause substantial variations in the thickness of said stream.
Claim 3
Dependent Claim
51 words
A method as in claim 1 wherein said step of generating includes the step of applying a sinusoidal signal to the stator winding of a linear motor mounted below said trough body and further including the step of varying the frequency of said signal to vary said thickness of said stream.
Claim 4
Dependent Claim
24 words
A method as in claim 1 including the step of varying the gradient of said inclined body to vary the thickness of said stream.
Claim 5
Dependent Claim
118 words
Apparatus for conveying molten metals comprising: a trough body for guiding a stream of molten metal and inclined with respect to the horizontal, a linear motor having its stator winding mounted beneath said body and means for generating a sinusoidal electrical signal and for applying said signal to said motor to produce a travelling electromagnetic wave which causes molted metal to move against gravity in an open stream up said inclined body and which has its field strength in a range such that substantial variations in said field strength do not cause substantial variations in the thickness of said stream and including means for varying the frequency of said signal as to vary the thickness of said stream.
Claim 6
Dependent Claim
118 words
Apparatus for conveying molten metals comprising: a trough body for guiding a stream of molten metal and inclined with respect to the horizontal, a linear motor having its stator winding mounted beneath said body and means for generating a sinusoidal electrical signal and for applying said signal to said motor to produce a travelling electromagnetic wave which causes molted metal to move against gravity in an open stream up said inclined body and which has its field strength in a range such that substantial variations in said field strength do not cause substantial variations in the thickness of said stream and including means for varying the frequency of said signal as to vary the thickness of said stream.
Claim 7
Dependent Claim
103 words
Apparatus for conveying molten metals comprising: a trough body for guiding a stream of molten metal and inclined with respect to the horizontal, means for generating a travelling electromagnetic wave along said body for causing molten metal in said body to move against gravity in an open stream up said inclined body and having its field strength in a range such that substantial variations in said field strength do not cause substantial variations in the thickness of said stream and means for varying the angle of said inclined surface with regard to the horizontal so as to vary the thickness of said stream.
Claim 8
Dependent Claim
103 words
Apparatus for conveying molten metals comprising: a trough body for guiding a stream of molten metal and inclined with respect to the horizontal, means for generating a travelling electromagnetic wave along said body for causing molten metal in said body to move against gravity in an open stream up said inclined body and having its field strength in a range such that substantial variations in said field strength do not cause substantial variations in the thickness of said stream and means for varying the angle of said inclined surface with regard to the horizontal so as to vary the thickness of said stream.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |