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US3762912A Expired / Lapsed US ⏱️ 0.0 years remaining

Refining process and apparatus

Assignee: Elphiac SA
•
Filing: 1971-01-13
•
Granted: 1973-10-02
•
Expires: 1991-01-13
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Abstract

Abstract A process and an apparatus for refining a product placed in a trough member and in which at least one molten zone created in the product is displaced through the trough and in which the molten zones are obtained by means of induction heating through one or plural successive coils fed by in phase currents oriented in such a way that the magnetic fields between two successive coils are opposite to each other. The process is characterized in that the trough is supported on one or plural metallic rails which are water-cooled and tensioned in the longitudinal direction by elastic means, in that the induction coils are placed around the trough and the rails and are displaced along the axis of the trough, and in that the coils are connected to an alternating current generator of intermediate frequency. The apparatus comprises a support for supporting the trough containing the product to be refined and the heating equipment, small rails secured to such support and supporting the trough, elastic means mounted on the support for tensioning the rails in the longitudinal direction, a guide secured to the support and supporting a mobile carriage, an inductor comprising at least one induction coil secured to the carriage and surrounding the trough, and an alternating current generator of intermediate frequency connected to the coil of the inductor.

Inventors

  • 👤 Jean-Marie Jacquerie
  • 👤 George Defosse
  • 👤 Paul Lams

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 16:44
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/101; H05B6/102; C; C30; C30B; C30B13/00; C30B13/16; C30B13/20; H05B6/22; H05B6/24; H05B6/30

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 29 words
Process as defined in claim 1, further comprising the step of surrounding the rails and the trough by a refractory housing inside of which is maintained a protecting atmosphere.
Claim 2
Dependent Claim 37 words
Process as defined in claim 1, further comprising the step of regulating the power at the location of each induction winding by means of a short-circuited winding placed at a suitable distance adjacent to said induction winding.
Claim 3
Independent Claim 133 words
A device for refining a product placed in a trough in which at least one molten zone created in the product is displaced through said product and in which said molten zone is obtained through induction heating, comprising: a. a support for supporting the trough containing the product to be refined; b. small rails secured to said support and supporting said trough; c. elastic means mounted on said support for tensioning said rails in the longitudinal direction; d. a guide secured to said support in parallel relationship to said trough and supporting a mobile carriage; e. an inductor comprising at least one induction coil secured to said mobile carriage and surrounding the rails and the trough; and f. an alternating current generator of intermediate frequency connected to said induction coil of said inductor.
Claim 4
Dependent Claim 23 words
A device as defined in claim 4, further comprising a refractory housing surrounding the rails and the trough and surrounded by said inductor.
Claim 5
Dependent Claim 51 words
A elastic means as defined in claim 4, wherein said device for tensioning the rails comprise a first headstock having a supporting collar including means for securing one end of the rails, and a second headstock having another supporting collar including means for elastically supporting the other end of the rails.
Claim 6
Dependent Claim 57 words
A device as defined in claim 4, wherein the inductor is composed of at least two induction coils connected in series to an intermediate frequency alternating current generator, and further comprising a short-circuited winding placed between said two induction coils and a device for regulating the position of said short-circuited winding with respect to said two windings.
Claim 7
Dependent Claim 189 words
Process for the refining of a product placed in a trough in which at least one molten zone created in the product is displaced through such product and in which said molten zone is obtained through induction heating by means of two or more successive induction coils fed by in phase currents oriented in such a manner that the magnetic fields between two successive coils oppose each other, such process comprising the steps of: a. supporting the trough on one or plural small metallic rails which are water-cooled and tensioned by elastIc means in the longitudinal direction; b. placing around the trough and the rails at least two of said induction coils and displacing them as a whole along the axis of the trough; c. placing a short circuited winding displaceably between two successive induction coils, and moving said short circuited winding into the neighbourhood of the trailing induction coil with respect to the movement of the coils of said at least two induction coils for lowering the magnetic field in said trailing coil; and d. connecting said induction coils to one or plural intermediate frequency alternating current generators.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-10-01 1977-04-02 1977-10-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-10-01 1981-04-02 1981-10-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-10-01 1985-04-02 1985-10-02 $7700.00 Window Closed / Lapsed

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