Patent US2944094A successfully refreshed from Google Patents.
US3361981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra-linear d.c. amplifier
Assignee: OPTIMATION Inc
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Filing: 1964-03-25
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Granted: 1968-01-02
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Expires: 1984-03-25
Abstract
No abstract record available.
Inventors
- 👤 Henry O Wolcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:28
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A DIRECT CURRENT AMPLIFIER IN WHICH THE AMPLIFICATION OF THE SIGNAL IS SUBSTANTIALLY COMPLETELY DETERMINED BY THE AMPLIFICATION FACTOR OF EACH SECTION OF A DUAL VACUUM TUBE COMPRISING; (A) A DUAL TRIODE VACUUM TUBE STRUCTURE, EACH OF THE TRIODES HAVING A GRID, A PLATE, AND A CATHODE IN COMMON, (B) ONLY A SINGLE CONSTANT CURRENT SOURCE CONNECTED BETWEEN SAID COMMON CATHODE AND SIGNAL GROUND, (C) MEANS CONNECTED TO SAID TWO GRIDS FOR DIFFERENTIALLY IMPRESSING A SIGNAL TO BE AMPLIFIED UPON SAID GRIDS, (D) A SECOND CONSTANT CURRENT SOURCE, (E) A CONNECTION FROM SAID SECOND CONSTANT CURRENT SOURCE TO ONLY ONE OF SAID TWO PLATES AND TO A SIGNAL GROUND, (F) A CONDUCTOR SOLELY CONNECTING THE OTHER OF SAID TWO PLATES TO SAID SIGNAL GROUND, AND (G) MEANS HAVING AN IMPEDANCE COMMENSURATE WITH THAT OF SAID SECOND CONSTANT CURRENT SOURCE CONNECTED TO THE SAME ONE OF SAID TWO PLATES TO OBTAIN THE AMPLIFIED SIGNAL.
Claim 2
Dependent Claim
153 words
A DIRECT CURRENT AMPLIFIER IN WHICH THE AMPLIFICATION OF THE SIGNAL IS SUBSTANTIALLY COMPLETELY DETERMINED BY THE AMPLIFICATION FACTOR OF EACH SECTION OF A DUAL VACUUM TUBE COMPRISING; (A) A DUAL TRIODE VACUUM TUBE STRUCTURE, EACH OF THE TRIODES HAVING A GRID, A PLATE, AND A CATHODE IN COMMON, (B) ONLY A SINGLE CONSTANT CURRENT SOURCE CONNECTED BETWEEN SAID COMMON CATHODE AND SIGNAL GROUND, (C) MEANS CONNECTED TO SAID TWO GRIDS FOR DIFFERENTIALLY IMPRESSING A SIGNAL TO BE AMPLIFIED UPON SAID GRIDS, (D) A SECOND CONSTANT CURRENT SOURCE, (E) A CONNECTION FROM SAID SECOND CONSTANT CURRENT SOURCE TO ONLY ONE OF SAID TWO PLATES AND TO A SIGNAL GROUND, (F) A CONDUCTOR SOLELY CONNECTING THE OTHER OF SAID TWO PLATES TO SAID SIGNAL GROUND, AND (G) MEANS HAVING AN IMPEDANCE COMMENSURATE WITH THAT OF SAID SECOND CONSTANT CURRENT SOURCE CONNECTED TO THE SAME ONE OF SAID TWO PLATES TO OBTAIN THE AMPLIFIED SIGNAL.
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) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |