Patent US3090924A successfully refreshed from Google Patents.
US3090924A
Expired / Lapsed
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Improved high-sensitivity trigger circuits
Assignee: Beckman Coulter Inc
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Filing: 1956-12-31
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Granted: 1963-05-21
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Norman T Seaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:45
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A TRIGGER CIRCUIT COMPRISING A CLASS A LINEAR VACUUM TUBE STAGE, A VACUUM TUBE CATHODE FOLLOWER STAGE, SAID STAGES HAVING A COMMON CATHODE RISISTOR CONDUCTING SUBSTANTIALLY ALL OF THE CATHODE CURRENT FROM BOTH OF SAID STAGES, NONLINEAR COUPLING MEANS CONNECTING SAID TWO STAGES TOGETHER IN REGENERATIVE CIRCUIT LOOP HAVING A LOOP GAIN THAT VARIES BETWEEN A VALUE GREATER THAN ONE AND A VALUE SMALLER THAN ONE, MEANS BIASING A CONTROL GRID OF ONE OF SAID STAGES TO A FIXED POTENTIAL FOR REGULATING THE SUM OF THE CURRENTS CONDUCTED BY SAID STAGES, AND DIRECT-COUPLED NEGATIVE FEEDBACK MEANS INCLUDING A NONLINEAR ASYMMETRICAL RESISTANCE ELEMENT AND CONTROLLING THE CONTROL GRID POTENTIAL OF THE OTHER OF SAID STAGES FOR REGULATING THE CURRENT CONDUCTED BY THE LATTER OF SAID STAGES ALONE.
Claim 2
Dependent Claim
126 words
A TRIGGER CIRCUIT COMPRISING A CLASS A LINEAR VACUUM TUBE STAGE, A VACUUM TUBE CATHODE FOLLOWER STAGE, SAID STAGES HAVING A COMMON CATHODE RISISTOR CONDUCTING SUBSTANTIALLY ALL OF THE CATHODE CURRENT FROM BOTH OF SAID STAGES, NONLINEAR COUPLING MEANS CONNECTING SAID TWO STAGES TOGETHER IN REGENERATIVE CIRCUIT LOOP HAVING A LOOP GAIN THAT VARIES BETWEEN A VALUE GREATER THAN ONE AND A VALUE SMALLER THAN ONE, MEANS BIASING A CONTROL GRID OF ONE OF SAID STAGES TO A FIXED POTENTIAL FOR REGULATING THE SUM OF THE CURRENTS CONDUCTED BY SAID STAGES, AND DIRECT-COUPLED NEGATIVE FEEDBACK MEANS INCLUDING A NONLINEAR ASYMMETRICAL RESISTANCE ELEMENT AND CONTROLLING THE CONTROL GRID POTENTIAL OF THE OTHER OF SAID STAGES FOR REGULATING THE CURRENT CONDUCTED BY THE LATTER OF SAID STAGES ALONE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |