Patent US3156770A successfully refreshed from Google Patents.
US3156770A
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Method and apparatus for selectively controlling sound emission
Assignee: HERSHMAN MUSICAL INSTR Co
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Filing: 1960-10-31
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Granted: 1964-11-10
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Expires: 1980-10-31
Abstract
No abstract record available.
Inventors
- 👤 Charles C Trainor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:59
CPC Classifications
H; H04; H04R; H04R3/00; H04R3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN A SOUND REPRODUCING SYSTEM, A LOUD SPEAKER, AN AMPLIFIER CONNECTED TO SAID LOUD SPEAKER, SETTABLE ATTENUATOR MEANS ASSOCIATED WITH SAID SPEAKER FOR REGULATING THE VOLUME OF SOUND EMITTED FROM SAID SPEAKER, A MOMENTARILY ACTUABLE SWITCH SELECTIVELY ACTUABLE TO BY-PASS SAID ATTENUATOR AND EFFECT A FULL VOLUME OUTPUT FROM SAID LOUD SPEAKER, A SECOND LOUD SPEAKER SPATIALLY SEPARATED FROM SAID FIRST LOUD SPEAKER AND NORMALLY DISCONNECTED FROM SAID AMPLIFIER AND A SECOND MOMENTARILY ACTUABLE SWITCH SELECTIVELY ACTUABLE TO CONNECT SAID SECOND LOUD SPEAKER TO SAID AMPLIFIER FOR EFFECTING SOUND EMISSION THEREFROM.
Claim 2
Dependent Claim
91 words
IN A SOUND REPRODUCING SYSTEM, A LOUD SPEAKER, AN AMPLIFIER CONNECTED TO SAID LOUD SPEAKER, SETTABLE ATTENUATOR MEANS ASSOCIATED WITH SAID SPEAKER FOR REGULATING THE VOLUME OF SOUND EMITTED FROM SAID SPEAKER, A MOMENTARILY ACTUABLE SWITCH SELECTIVELY ACTUABLE TO BY-PASS SAID ATTENUATOR AND EFFECT A FULL VOLUME OUTPUT FROM SAID LOUD SPEAKER, A SECOND LOUD SPEAKER SPATIALLY SEPARATED FROM SAID FIRST LOUD SPEAKER AND NORMALLY DISCONNECTED FROM SAID AMPLIFIER AND A SECOND MOMENTARILY ACTUABLE SWITCH SELECTIVELY ACTUABLE TO CONNECT SAID SECOND LOUD SPEAKER TO SAID AMPLIFIER FOR EFFECTING SOUND EMISSION THEREFROM.
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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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |