US3240858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical musical instrument
Assignee: Hammond Organ Co
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Filing: 1962-11-26
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Granted: 1966-03-15
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Expires: 1982-11-26
Abstract
No abstract record available.
Inventors
- 👤 Trust Harris
- 👤 Bank Savings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:33
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN AN ELECTRICAL MUSICAL INSTRUMENT HAVING PLAYING KEYS, A SOURCE OF COMPLEX ELECTRICAL AUDIO TONE SIGNAL WAVES, AN OUTPUT CIRCUIT INCLUDING A TRANSDUCER FOR RERECEIVNG SAID SIGNAL WAVES, A GLOW DISCHARGE SWITCHING MEANS FOR COUPLING THE SOURCE WITH THE OUTPUT CIRCUIT WHEN IONIZED, MEANS RENDERED EFFECTIVE UPON OPERATION OF ONE OF SAID PLAYING KEYS FOR APPLYING A DIRECT CURRENT VOLTAGE TO SAID GLOW DISCHARGE SWITCHING MEANS FOR RENDERING SAID SWITCHING MEANS IONIZED AND CONDUCTIVE FOR TRANSMITTING SAID SIGNAL WAVES TO SAID OUTPUT CIRCUIT, AND MEANS FOR SUPERIMPOSING AN ADDITIONAL COMPLEX SIGNAL WAVE ON THE OUTPUT TERMINAL OF SAID SWITCHING MEANS, SAID ADDITIONAL COMPLEX WAVE HAVING SUBSTANTIALLY THE SAME WAVE SHAPED AND IDENTICAL FREQUENCY AS THE SOURCE SIGNAL WAVE BUT OF OPPOSITE POLARITY SO AS TO EFFECTIVELY CANCEL OUT THE CAPACITATIVE TRANSMISSION OF THE SOURCE SIGNAL WAVE THROUGH THE GLOW DISCHARGE SWITCHING MEANS WHEN SAID SWITCHING MEANS IS NOT IONIZED.
Claim 2
Dependent Claim
149 words
IN AN ELECTRICAL MUSICAL INSTRUMENT HAVING PLAYING KEYS, A SOURCE OF COMPLEX ELECTRICAL AUDIO TONE SIGNAL WAVES, AN OUTPUT CIRCUIT INCLUDING A TRANSDUCER FOR RERECEIVNG SAID SIGNAL WAVES, A GLOW DISCHARGE SWITCHING MEANS FOR COUPLING THE SOURCE WITH THE OUTPUT CIRCUIT WHEN IONIZED, MEANS RENDERED EFFECTIVE UPON OPERATION OF ONE OF SAID PLAYING KEYS FOR APPLYING A DIRECT CURRENT VOLTAGE TO SAID GLOW DISCHARGE SWITCHING MEANS FOR RENDERING SAID SWITCHING MEANS IONIZED AND CONDUCTIVE FOR TRANSMITTING SAID SIGNAL WAVES TO SAID OUTPUT CIRCUIT, AND MEANS FOR SUPERIMPOSING AN ADDITIONAL COMPLEX SIGNAL WAVE ON THE OUTPUT TERMINAL OF SAID SWITCHING MEANS, SAID ADDITIONAL COMPLEX WAVE HAVING SUBSTANTIALLY THE SAME WAVE SHAPED AND IDENTICAL FREQUENCY AS THE SOURCE SIGNAL WAVE BUT OF OPPOSITE POLARITY SO AS TO EFFECTIVELY CANCEL OUT THE CAPACITATIVE TRANSMISSION OF THE SOURCE SIGNAL WAVE THROUGH THE GLOW DISCHARGE SWITCHING MEANS WHEN SAID SWITCHING MEANS IS NOT IONIZED.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |