Patent US3392309A successfully refreshed from Google Patents.
US3392309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetron power supply and cathode heater circuit
Assignee: US Philips Corp
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Filing: 1965-05-24
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Granted: 1968-07-09
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Expires: 1985-05-24
Abstract
No abstract record available.
Inventors
- 👤 Wallace C Hickman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:58
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/01; H03B9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A POWER SUPPLY CIRCUIT FOR AN ELECTRON DISCHARGE DEVICE OF THE TYPE HAVING A CATHODE AND AN ANODE AND BEING CHARACTERIZED BY THE FEATURE THAT THE ANODE CURRENT IS SUBSTANTIALLY ZERO BELOW A GIVEN VALUE OF ANODE VOLTAGE, COMPRISING A TRANSFORMER HAVING AN INPUT WINDING AND A FIRST HIGH VOLTAGE SUPPLY WINDING AND A SECOND SUPPLY WINDING, MEANS CONNECTING SAID FIRST WINDING ACROSS THED ANODE AND CATHODE OF SAID DEVICE, MEANS CONNECTING SAID SECOND WINDING TO SAID DEVICE SO AS TO HEAT SAID CATODE, AND A SOURCE OF ALTERNATING VOLTAGE CONNECTED TO SAID INPUT WINDING AND COMPRISING MEANS FOR SELECTIVELY APPLYING A FIRST ALTERNATING VOLTAGE TO SAID INPUT WINDING AND THEREAFTER A SECOND ALTERNATING VOLTAGE HAVING A VALUE GREATER THAN THE FIRST VOLTAGE, SAID FIRST VOLTAGE HAVING A VALUE SUFFICIENT TO HEAT SAID CATHODE AND INSUFFICIENT TO CAUSE AN APPRECIABLE FLOW OF ANODE CURRENT IN SAID DEVICE.
Claim 2
Dependent Claim
147 words
A POWER SUPPLY CIRCUIT FOR AN ELECTRON DISCHARGE DEVICE OF THE TYPE HAVING A CATHODE AND AN ANODE AND BEING CHARACTERIZED BY THE FEATURE THAT THE ANODE CURRENT IS SUBSTANTIALLY ZERO BELOW A GIVEN VALUE OF ANODE VOLTAGE, COMPRISING A TRANSFORMER HAVING AN INPUT WINDING AND A FIRST HIGH VOLTAGE SUPPLY WINDING AND A SECOND SUPPLY WINDING, MEANS CONNECTING SAID FIRST WINDING ACROSS THED ANODE AND CATHODE OF SAID DEVICE, MEANS CONNECTING SAID SECOND WINDING TO SAID DEVICE SO AS TO HEAT SAID CATODE, AND A SOURCE OF ALTERNATING VOLTAGE CONNECTED TO SAID INPUT WINDING AND COMPRISING MEANS FOR SELECTIVELY APPLYING A FIRST ALTERNATING VOLTAGE TO SAID INPUT WINDING AND THEREAFTER A SECOND ALTERNATING VOLTAGE HAVING A VALUE GREATER THAN THE FIRST VOLTAGE, SAID FIRST VOLTAGE HAVING A VALUE SUFFICIENT TO HEAT SAID CATHODE AND INSUFFICIENT TO CAUSE AN APPRECIABLE FLOW OF ANODE CURRENT IN SAID DEVICE.
References Cited (Backward Citations)
US2792468A
Cited
US3351808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |