Patent US3611027A successfully refreshed from Google Patents.
US3611027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetron operating circuit
Assignee: Toshiba Corp
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Filing: 1969-02-10
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Granted: 1971-10-05
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Expires: 1989-02-10
Abstract
Abstract In a circuit for operating a magnetron tube by energizing it by the use of a voltage-doubler rectifier circuit, means is provided to temporarily reduce the anode voltage below the normal oscillation voltage after the cathode electrode has been warmed up to normal electron emission temperature.
Inventors
- 👤 Tokuju Koinuma
- 👤 Tadashi Itahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:07
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/66; H05B6/666; H03; H03B; H03B9/00; H03B9/01; H03B9/10; H05B2206/00; H05B2206/04; H05B2206/043
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
204 words
A magnetron operating circuit, comprising a magnetron tube, a source of alternating current, a transformer to boost the output voltage of said source, a first rectifier having an electrode connected to a first output terminal of the secondary winding of said transformer, a second rectifier having an electrode connected to said first output terminal in a polarity opposite to that of said electrode of said first rectifier, a first condenser connected between the other electrode of said first rectifier and a second output terminal of said secondary winding, a second condenser connected between the other electrode of said second rectifier and said second output terminal of said secondary winding, said first and second condensers being connected in series across the anode-cathode circuit of said magnetron to provide a rectified double voltage for energizing the anodecathode circuit of said magnetron tube, means for temporarily reducing the anode-cathode voltage of said magnetron tube below its normal oscillation voltage and said means for reducing the anode-cathode voltage comprising a negative pulse generator connected across the secondary winding of said transformer so as to apply at least one negative pulse to the secondary circuit after elapse of the warmup period of the cathode electrode of said magnetron tube.
Claim 2
Dependent Claim
204 words
A magnetron operating circuit, comprising a magnetron tube, a source of alternating current, a transformer to boost the output voltage of said source, a first rectifier having an electrode connected to a first output terminal of the secondary winding of said transformer, a second rectifier having an electrode connected to said first output terminal in a polarity opposite to that of said electrode of said first rectifier, a first condenser connected between the other electrode of said first rectifier and a second output terminal of said secondary winding, a second condenser connected between the other electrode of said second rectifier and said second output terminal of said secondary winding, said first and second condensers being connected in series across the anode-cathode circuit of said magnetron to provide a rectified double voltage for energizing the anodecathode circuit of said magnetron tube, means for temporarily reducing the anode-cathode voltage of said magnetron tube below its normal oscillation voltage and said means for reducing the anode-cathode voltage comprising a negative pulse generator connected across the secondary winding of said transformer so as to apply at least one negative pulse to the secondary circuit after elapse of the warmup period of the cathode electrode of said magnetron tube.
Claim 3
Dependent Claim
29 words
A magnetron operating circuit according to claim 1 wherein said negative pulse generator is connected across the secondary winding of said transformer between said secondary winding and said rectifiers.
Claim 4
Dependent Claim
181 words
A magnetron operating circuit, comprising a magnetron tube, a source of alternating current, a transformer to boost the output voltage of said source, a first rectifier having an electrode connected to a first output terminal of the secondary winding of said transformer, a second rectifier having an electrode connected to said first output terminal in a polarity opposite to that of said electrode of said first rectifier, a first condenser connected between the other electrode of said first rectifier and a second output terminal of said secondary winding, a second condenser connected between the other electrode of said rectifier and said second output terminal of said secondary winding, said first and second condensers being connected in series across the anode-cathode circuit of said magnetron to provide a full-wave rectified double voltage for energizing the anode-cathode circuit of said magnetron tube, and means for temporarily reducing the anode-cathode voltage of said magnetron tube below its normal oscillation voltage to obtain a ripple voltage, said reducing means comprising an impedance connected in parallel with either one said first rectifier and said second rectifier.
Claim 5
Dependent Claim
181 words
A magnetron operating circuit, comprising a magnetron tube, a source of alternating current, a transformer to boost the output voltage of said source, a first rectifier having an electrode connected to a first output terminal of the secondary winding of said transformer, a second rectifier having an electrode connected to said first output terminal in a polarity opposite to that of said electrode of said first rectifier, a first condenser connected between the other electrode of said first rectifier and a second output terminal of said secondary winding, a second condenser connected between the other electrode of said rectifier and said second output terminal of said secondary winding, said first and second condensers being connected in series across the anode-cathode circuit of said magnetron to provide a full-wave rectified double voltage for energizing the anode-cathode circuit of said magnetron tube, and means for temporarily reducing the anode-cathode voltage of said magnetron tube below its normal oscillation voltage to obtain a ripple voltage, said reducing means comprising an impedance connected in parallel with either one said first rectifier and said second rectifier.
Claim 6
Dependent Claim
14 words
A magnetron operating circuit according to claim 3 wherein said impedance comprises a condenser.
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |