US3705284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inductor for the thermal treatment of a material which is not very or non-electrically conducting containing ferromagnetic or electrically conductive particles
Assignee: Elphiac SA
•
Filing: 1970-02-24
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Granted: 1972-12-05
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Expires: 1990-02-24
Abstract
Abstract An inductor for use in the thermal treatment of a material which is not very or non-electrically conducting containing ferromagnetic or electrically conductive particles. The inductor forms, in combination with the insulation between its conductors, a mold in which the material containing ferromagnetic or electrically conductive particles is submitted to the thermal treatment.
Inventors
- 👤 Pierre Binard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:38
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/02; B30B15/022; B30B15/34; F; F27; F27D; F27D11/00; F27D11/06; H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/365
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
An inductor for use in the thermal treatment of a material which is relatively poorly electrically conducting and containing electrically conductive particles comprising two electrically conductive half molds having the shape of a hollow torus separated through its plane of symmetry perpendicular to the axis of the torus, an insulating ring positioned between the two inside mating edges of said half molds, means for insuring a positive electrical contact between outside mating edges of said half molds, and current feeding conductors connected to the inside edges of said half molds and adapted for connection to a source of high frequency current.
Claim 2
Dependent Claim
101 words
An inductor for use in the thermal treatment of a material which is relatively poorly electrically conducting and containing electrically conductive particles comprising two electrically conductive half molds having the shape of a hollow torus separated through its plane of symmetry perpendicular to the axis of the torus, an insulating ring positioned between the two inside mating edges of said half molds, means for insuring a positive electrical contact between outside mating edges of said half molds, and current feeding conductors connected to the inside edges of said half molds and adapted for connection to a source of high frequency current.
Claim 3
Dependent Claim
27 words
An inductor as defined in claim 1, further comprising shaped pieces located inside the half molds and made of a thermosetting material which is non electrically conducting.
Claim 4
Dependent Claim
20 words
An inductor as defined in claim 2, wherein said thermosetting material is Araldite which is resistant to at least 150*C.
Claim 5
Dependent Claim
42 words
An inductor as defined in claim 1, wherein the means ensuring a positive electrical contact between the outside edges of said half molds comprise contact springs located at equal distances along the inside circumference of the outside edges of said half molds.
Claim 6
Dependent Claim
39 words
An inductor as defined in claim 1, wherein the means ensuring a positive electrical contact between the outside edges of said half molds comprise a small projection along the inside circumference of the outside edges of sad half molds.
Claim 7
Dependent Claim
35 words
An inductor as defined in claim 5, wherein a thin coating of a metal the conducting properties of which are not impaired by sulphur are disposed along the mating outside edges of said half molds.
Claim 8
Dependent Claim
58 words
An inductor as defined in claim 1, wherein said high frequency current source comprises a transformer having a primary winding and a secondary winding located adjacent to the torus formed by said half molds, and wherein the current conductors connected to the inside edges of said half molds are the ends of the secondary winding of said transformer.
Claim 9
Dependent Claim
27 words
An inductor as defined in claim 13, wherein said transformer is a toroidal transformer which is connected to said half molds by means of two concentric sleeves.
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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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |