Patent US3077567A successfully refreshed from Google Patents.
US3077567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable frequency multivibrator
Assignee: General Precision Inc
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Filing: 1960-03-23
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Granted: 1963-02-12
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Expires: 1980-03-23
Abstract
No abstract record available.
Inventors
- 👤 John W Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:44
CPC Classifications
H; H03; H03K; H03K7/00; H03K7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A MULTIVIBRATOR CIRCUIT COMPRISING A PAIR OF TRANSISTORS WHICH CONDUCT IN ALTERNATE HALF CYCLES OF MULTIVIBRATOR OPERATION, EACH OF SAID TRANSISTORS HAVING AN OUTPUT ELECTRODE AND A CONTROL ELECTRODE, FIRST MEANS INCLUDING A FIRST CONDENSER CONNECTING THE OUTPUT ELECTRODE OF ONE TRANSISTOR TO THE CONTROL ELECTRODE OF THE OTHER, SECOND MEANS INCLUDING A SECOND CONDENSER CONNECTING THE OUTPUT ELECTRODE OF THE SAID OTHER TRANSISTOR TO THE CONTROL ELECTRODE OF THE SAID ONE TRANSISTOR, MEANS RESPONSIVE TO A SIGNAL FROM AN EXTERNAL SOURCE FOR PROVIDING A CONSTANT CURRENT SOURCE THE MAGNITUDE OF WHICH CORRESPONDS TO THE SIGNAL FROM SAID EXTERNAL SOURCE, AND MEANS FOR ALTERNATELY ESTABLISHING TWO ISOLATED DISCHARGE PATHS ONE BETWEEN THE FIRST CONDENSER AND THE CONSTANT CURRENT SOURCE AND THE SECOND BETWEEN THE SECOND CONDENSER AND THE CURRENT SOURCE WHEREBY THE CONDENSER ARE DISCHARGED AT A RATE WHICH IS DETERMINED SOLELY BY THE MAGNITUDE OF THE CURRENT FROM SAID CONSTANT CURRENT SOURCE.
Claim 2
Dependent Claim
153 words
A MULTIVIBRATOR CIRCUIT COMPRISING A PAIR OF TRANSISTORS WHICH CONDUCT IN ALTERNATE HALF CYCLES OF MULTIVIBRATOR OPERATION, EACH OF SAID TRANSISTORS HAVING AN OUTPUT ELECTRODE AND A CONTROL ELECTRODE, FIRST MEANS INCLUDING A FIRST CONDENSER CONNECTING THE OUTPUT ELECTRODE OF ONE TRANSISTOR TO THE CONTROL ELECTRODE OF THE OTHER, SECOND MEANS INCLUDING A SECOND CONDENSER CONNECTING THE OUTPUT ELECTRODE OF THE SAID OTHER TRANSISTOR TO THE CONTROL ELECTRODE OF THE SAID ONE TRANSISTOR, MEANS RESPONSIVE TO A SIGNAL FROM AN EXTERNAL SOURCE FOR PROVIDING A CONSTANT CURRENT SOURCE THE MAGNITUDE OF WHICH CORRESPONDS TO THE SIGNAL FROM SAID EXTERNAL SOURCE, AND MEANS FOR ALTERNATELY ESTABLISHING TWO ISOLATED DISCHARGE PATHS ONE BETWEEN THE FIRST CONDENSER AND THE CONSTANT CURRENT SOURCE AND THE SECOND BETWEEN THE SECOND CONDENSER AND THE CURRENT SOURCE WHEREBY THE CONDENSER ARE DISCHARGED AT A RATE WHICH IS DETERMINED SOLELY BY THE MAGNITUDE OF THE CURRENT FROM SAID CONSTANT CURRENT SOURCE.
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) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |