US3632948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for inductors for induction heating
Assignee: SOC DE TRAITEMENTS ELECTROLYTIQUES ET ELECTROTHERMIQUES
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Filing: 1970-07-13
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Granted: 1972-01-04
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Expires: 1990-07-13
Abstract
Abstract To braze two platelike elements, in a press, together, particularly to join a good heat-conductive metal to stainless steel, for use in cooking utensils, or the like, an induction coil is formed of concentric rings, or of a spiral, and individual coils thereof are placed closer, or farther away from the surface to be heated, by means of adjustment screws, the adjustment of individual coils, or coil portions being carried out in accordance with sensed temperature directly, or differentially sensing temperature along the contiguous surfaces of the plates, by introducing a thermocouple into grooves formed in at least one of the plates and adjusting the height of the coils, or coil portions for minimum temperature difference across the diameter of the plate.
Inventors
- 👤 Jean Moulin
- 👤 Jacques Doucerain
- 👤 Bernard Dallet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:27
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/002
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
170 words
Apparatus for manufacturing inductors for induction heating, and particularly for brazing at least two parallel contiguous flat plates together and for said inductors to provide a substantially uniform temperature distribution over the contiguous surfaces of said plates comprising: two contiguous flat metal plates; a hollow inductor formed of a plurality of concentric windings each of which is substantially parallel to said plates said inductor having an axis perpendicular to said plates; means for supplying said inductor with high frequency electric power; a hollow housing having a flat bottom wall and sidewalls containing said inductor; a ferromagnetic susceptor plate inserted between said bottom wall and one of said contiguous plates; plate-shaped means for thermally insulating said bottom wall inserted between said latter and said susceptor plate; means or measuring the temperature in a plurality of locations between said contiguous plates; and means for independently adjustably fixing the distance of predetermined portions of said windings within said housing from said bottom wall so as to obtain substantially uniform temperatures at said locations.
Claim 2
Dependent Claim
170 words
Apparatus for manufacturing inductors for induction heating, and particularly for brazing at least two parallel contiguous flat plates together and for said inductors to provide a substantially uniform temperature distribution over the contiguous surfaces of said plates comprising: two contiguous flat metal plates; a hollow inductor formed of a plurality of concentric windings each of which is substantially parallel to said plates said inductor having an axis perpendicular to said plates; means for supplying said inductor with high frequency electric power; a hollow housing having a flat bottom wall and sidewalls containing said inductor; a ferromagnetic susceptor plate inserted between said bottom wall and one of said contiguous plates; plate-shaped means for thermally insulating said bottom wall inserted between said latter and said susceptor plate; means or measuring the temperature in a plurality of locations between said contiguous plates; and means for independently adjustably fixing the distance of predetermined portions of said windings within said housing from said bottom wall so as to obtain substantially uniform temperatures at said locations.
Claim 3
Dependent Claim
60 words
Apparatus as claimed in claim 1, further comprising: first means for cooling said inductor by circulating a fluid through said winding; and second means for cooling said housing comprising a platelike element with parallel cooling ducts contiguous with said bottom wall of said housing, whereby allowing to carry out the adjustment of said winding distances at approximately the brazing temperature.
Claim 4
Dependent Claim
70 words
Apparatus as claimed in claim 1, wherein said adjustable distance fixing means comprise: an electrically insulating cross plate fixed to said housing sidewalls substantially parallel with said bottom wall; a plurality of adjustments screws respectively secured to said windings, at one end; and means for adjustably securing said screws, at their other end, to said cross plate, at least two screws holding opposite points of windings or of portions thereof.
Claim 5
Dependent Claim
41 words
Apparatus as claimed in claim 3, wherein said adjustable fixing means further comprise: a central rod of insulating material, secured with respect to said housing, for supporting the central turns of said inductor in fixed position close to said bottom wall.
Claim 6
Dependent Claim
53 words
Apparatus as claimed in claim 1, wherein said temperature measuring means includes at least one thermocouple movable between said contiguous plates and wherein one of said latter comprises at least one straight groove going from its center to its edge for inserting said thermocOuple therein and for the displacement of said latter therealong.
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 |