US3732504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply circuit for a heating magnetron
Assignee: Individual
•
Filing: 1969-07-14
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Granted: 1973-05-08
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Expires: 1989-07-14
Abstract
Abstract A power supply circuit for varying the power output of a heating magnetron which includes controlling a variable inductance to tune a capacitance to resonance to vary the power, and which comprises a variable inductance in series with the magnetron.
Inventors
- 👤 M Levinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:32
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/01; H03B9/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
A circuit to provide control over the power output of a magnetron which comprises: a transformer, a source of alternating power across the primary of the transformer, a variable inductance in series with the source of alternating power and the primary of the transformer, control means for varying the inductance of the variable inductance, a magnetron which discharges in response to less than twice the secondary voltage of the transformer, a capacitance where the capacitance is in series with the magnetron and also in series with the secondary of the transformer, and, a rectifier which includes a cathode and an anode, said rectifier cathode being connected to the anode of said magnetron, and said rectifier anode being connected to the cathode of said magnetron.
Claim 2
Dependent Claim
124 words
A circuit to provide control over the power output of a magnetron which comprises: a transformer, a source of alternating power across the primary of the transformer, a variable inductance in series with the source of alternating power and the primary of the transformer, control means for varying the inductance of the variable inductance, a magnetron which discharges in response to less than twice the secondary voltage of the transformer, a capacitance where the capacitance is in series with the magnetron and also in series with the secondary of the transformer, and, a rectifier which includes a cathode and an anode, said rectifier cathode being connected to the anode of said magnetron, and said rectifier anode being connected to the cathode of said magnetron.
Claim 3
Dependent Claim
35 words
A circuit, according to claim 1, where the variable inductance includes: a wire helix wound on a fixed magnetic core, and a varying means for varying the number of effective turns of the wire helix.
Claim 4
Dependent Claim
31 words
A circuit, according to claim 2, where at least one turn of the low inductance end of the variable inductance is capable of carrying more current than the other helix turns.
Claim 5
Dependent Claim
34 words
A circuit, according to claim 2, where the means varying the number of turns, includes means for turning off the power output of the magnetron at the high inductance end of the variable inductance.
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |