US3571644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency oscillator for inductive heating
Assignee: Heurtey SA
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Filing: 1969-01-27
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Granted: 1971-03-23
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Expires: 1989-01-27
Abstract
Abstract An electric current generator, notably high frequency generator, for supplying feed current to an inductor more particularly for heating purposes. Between the inductor and an oscillator tube is disposed an aperiodic impedance-matching transformer delivering low voltage current to an oscillating circuit consisting of said inductor and one or a plurality of capacitors. A line is disposed between the oscillating circuit and the oscillator tube. The function of this line is to convey the energy necessary for sustaining the oscillation.
Inventors
- 👤 Albert Jakoubovitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:14
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
111 words
A device for supplying energizing power to an inductor for heating purposes comprising an oscillating circuit formed by an oscillator tube producing high frequency currents, an inductor for heating associated in parallel with a battery of condensers and an aperiodic impedance-matching transformer between said oscillator tube and said inductor for heating, a line operating as a regenerative feedback at the neighborhood of its characteristic impedance disposed between the secondary of said transformer and the grid of said tube, said line forming a filter preventing the operation of said device upon any frequency other than that resulting from the association of said inductor and said battery of condensers associated with said inductor.
Claim 2
Independent Claim
111 words
A device for supplying energizing power to an inductor for heating purposes comprising an oscillating circuit formed by an oscillator tube producing high frequency currents, an inductor for heating associated in parallel with a battery of condensers and an aperiodic impedance-matching transformer between said oscillator tube and said inductor for heating, a line operating as a regenerative feedback at the neighborhood of its characteristic impedance disposed between the secondary of said transformer and the grid of said tube, said line forming a filter preventing the operation of said device upon any frequency other than that resulting from the association of said inductor and said battery of condensers associated with said inductor.
Claim 3
Dependent Claim
21 words
A device according to claim 1 wherein said line is connected via a capacitor to the grid of said oscillator tube.
Claim 4
Dependent Claim
24 words
A device according to claim 1 wherein the voltage in said line is fed to the grid of said oscillator tube via a transformer.
References Cited (Backward Citations)
US2589477A
Cited
US2765387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |