US3385973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bistable amplifier circuits
Assignee: NORBATROL ELECTRONICS CORP
•
Filing: 1964-04-14
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Granted: 1968-05-28
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Expires: 1984-04-14
Abstract
No abstract record available.
Inventors
- 👤 Harry J Abrams
- 👤 Roland W Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:23
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/45
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
171 words
A DUAL OUTPUT BISTABLE AMPLIFIER SWITCHING POWER FROM AN AC SOURCE TO A FIRST OUTPUT OR TO A SECOND OUTPUT DEPENDING UPON THE POLARITY AND MAGNITUDE OF A CONTROL CURRENT TO THE AMPLIFIER COMPRISING: (A) A POWER CONTROL CIRCUIT CONNECTED BETWEEN THE AC SOURCE AND THE FIRST AND SECOND OUTPUTS, THE POWER CONTROL CIRCUIT HAVING A PLURALITY OF SILICON CONTROLLED RECTIFIERS HAVING CATHODES, ANODES, AND GATES, THE SILICON CONTROLLED RECTIFIERS CONTROLLING THE FLOW OF CURRENT FROM THE AC SOURCE TO THE FIRST AND SECOND OUTPUTS; (B) A HALF WAVE SELF-SATURATING PUSH-PULL MAGNETIC AMPLIFIER HAVING AN OUTPUT COUPLED TO GATES OF SILICON CONTROLLED RECTIFIERS, THE MAGNETIC AMPLIFIER PRODUCING A PULSE OUTPUT VOLTAGE OF A FIRST POLARITY WHICH TRIGGERS A SILICON CONTROLLED RECTIFIER DEPENDING UPON THE POLARITY AND MAGNITUDE OF CONTROL CURRENT TO THE MAGNETIC AMPLIFIER WHEREBY POWER TO THE FIRST OUTPUT IS SWITCHED, THE MAGNETIC AMPLIFIER PRODUCING A PULSE OUTPUT VOLTAGE OF A SECOND POLARITY WHICH TRIGGERS A SILICON CONTROLLED RECTIFIER DEPENDING UPON THE POLARITY AND MAGNITUDE OF CONTROL CURRENT TO THE
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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) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |