US3350653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic electron tube circuit
Assignee: Emerson Process Management Ltd
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Filing: 1964-12-04
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Granted: 1967-10-31
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Expires: 1984-12-04
Abstract
No abstract record available.
Inventors
- 👤 Tenny D Lode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:52
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/544
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
AN ELECTRON TUBE CIRCUIT COMPRISING AN ELECTRON TUBE HAVING A THERMIONIC ELECTRON EMITTING CATHODE, AN ANODE AND A CONTROL GRID, HEATING MEANS FOR VARYING THE CATHODE TEMPERATURE, MEANS COUPLED TO THE HEATING MEANS FOR CONTROLLING THE MAGNITUDE OF THE HEATING THEREBY CONTROLLING THE CATHODE TEMPERATURE, POWER TERMINALS FOR CONNECTING A DIRECT VOLTAGE SUPPLY IN SERIES WITH THE ANODE AND CATHODE SO THAT A CURRENT MAY FLOW FROM ANODE TO CATHODE, SIGNAL TERMINALS FOR APPLYING A VOLTAGE SIGNAL TO THE CONTROL GRID, FIRST MEANS RESPONSIVE TO THE ANODE CURRENT EFFECTING A FIRST CONTROL OF THE MAGNITUDE OF THE HEATING, AND SECOND MEANS RESPONSIVE TO THE VOLTAGE AT THE SIGNAL TERMINALS EFFECTING A SECOND CONTROL OF THE MAGNITUDE OF THE HEATING, WHEREBY THE TEMPERATURE OF THE CATHODE IS CONTROLLED IN PART BY THE ANODE CURRENT AND IN PART BY THE VOLTAGE AT THE SIGNAL TERMINALS.
Claim 2
Dependent Claim
143 words
AN ELECTRON TUBE CIRCUIT COMPRISING AN ELECTRON TUBE HAVING A THERMIONIC ELECTRON EMITTING CATHODE, AN ANODE AND A CONTROL GRID, HEATING MEANS FOR VARYING THE CATHODE TEMPERATURE, MEANS COUPLED TO THE HEATING MEANS FOR CONTROLLING THE MAGNITUDE OF THE HEATING THEREBY CONTROLLING THE CATHODE TEMPERATURE, POWER TERMINALS FOR CONNECTING A DIRECT VOLTAGE SUPPLY IN SERIES WITH THE ANODE AND CATHODE SO THAT A CURRENT MAY FLOW FROM ANODE TO CATHODE, SIGNAL TERMINALS FOR APPLYING A VOLTAGE SIGNAL TO THE CONTROL GRID, FIRST MEANS RESPONSIVE TO THE ANODE CURRENT EFFECTING A FIRST CONTROL OF THE MAGNITUDE OF THE HEATING, AND SECOND MEANS RESPONSIVE TO THE VOLTAGE AT THE SIGNAL TERMINALS EFFECTING A SECOND CONTROL OF THE MAGNITUDE OF THE HEATING, WHEREBY THE TEMPERATURE OF THE CATHODE IS CONTROLLED IN PART BY THE ANODE CURRENT AND IN PART BY THE VOLTAGE AT THE SIGNAL TERMINALS.
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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |