Patent US3256391A successfully refreshed from Google Patents.
US3256391A
Expired / Lapsed
US
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Method and apparatus for controlling feedback
Assignee: Individual
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Filing: 1963-04-16
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Granted: 1966-06-14
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Expires: 1983-04-16
Abstract
No abstract record available.
Inventors
- 👤 Boner Charles Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:07
CPC Classifications
H; H04; H04R; H04R3/00; H04R3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
AN APPARATUS FOR CONTROLLING FEEDBACK IN A SOUND REENFORCING SYSTEM HAVING A POWER AMPLIFIER, AN AMPLIFIER, AND A LINK CIRCUIT CONNECTING SAID AMPLIFIERS, COMPRISING: A COIL CONNECTED IN SERIES IN SAID LINK CIRCUIT BETWEEN SAID AMPLIFIERS, AND A CAPACITOR CONNECTED IN SHUNT WITH SAID COIL, SAID CAPACITOR TUNING SAID COIL TO A FREQUENCY OF OSCILLATION PRODUCING FEEDBACK FOR ELIMINATING SAID FEEDBACK, THE INDUCTANCE OF SAID COIL BEING ADJUSTABLE TO PROVIDE MINIMUM INSERTION LOSS AT THE FREQUENCY REQUIRED TO ELIMINATE THE FEEDBACK.
Claim 2
Independent Claim
81 words
AN APPARATUS FOR CONTROLLING FEEDBACK IN A SOUND REENFORCING SYSTEM HAVING A POWER AMPLIFIER, AN AMPLIFIER, AND A LINK CIRCUIT CONNECTING SAID AMPLIFIERS, COMPRISING: A COIL CONNECTED IN SERIES IN SAID LINK CIRCUIT BETWEEN SAID AMPLIFIERS, AND A CAPACITOR CONNECTED IN SHUNT WITH SAID COIL, SAID CAPACITOR TUNING SAID COIL TO A FREQUENCY OF OSCILLATION PRODUCING FEEDBACK FOR ELIMINATING SAID FEEDBACK, THE INDUCTANCE OF SAID COIL BEING ADJUSTABLE TO PROVIDE MINIMUM INSERTION LOSS AT THE FREQUENCY REQUIRED TO ELIMINATE THE FEEDBACK.
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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |