Patent US3582530A successfully refreshed from Google Patents.
US3582530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic musical instrument producing percussion signals by additive mixing of component signals
Assignee: Nippon Gakki Co Ltd
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Filing: 1970-03-11
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Granted: 1971-06-01
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Expires: 1990-03-11
Abstract
Abstract An electronic musical instrument for simulating percussion sounds comprises a touch-responsive keyboard section for generating a voltage whose level varies in accordance with the magnitude of force with which the key is depressed to give forth percussion sounds, a low frequency oscillator having a relatively long period of oscillation activated by signal from said section and a similarly activated high frequency oscillator having a relatively short period of oscillation, wherein the levels of signals from both of the oscillators are respectively controlled according to the magnitude of voltage derived from said touchresponsive keyboard section in such a manner that the voltage level of the high frequency oscillator is controlled to a greater extent than that of the low frequency oscillator, and there are mixed a controlled signal component from said high frequency oscillator and a signal component from said low frequency oscillator so as to generate percussion sounds more truthfully simulating those of a natural percussion instrument.
Inventors
- 👤 Takeshi Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:36
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/04; G10H1/053; G10H1/055; G10H1/0555
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
An electronic musical instrument for simulating percussion sounds which comprises means for generating a voltage whose level varies in accordance with a magnitude of force with which a key is depressed, a first waveforming device for shaping output voltage from said voltage-generating means into that whose waveform has a long period of rising and decaying, a second waveforming device for shaping said output voltage into that whose waveform has a short period of rising and decaying, a first oscillator for generating signal of relatively low frequency modulated in amplitude by output signal from said first waveforming device, a second oscillator for generating signal of relatively high frequency modulated in amplitude by output signal from said second waveforming device, means for further controlling the level of output from said second oscillator modulated in amplitude according to the level of voltage supplied by said voltage-generating means, means for jointly amplifying leveL-controlled output from said second oscillator and output from said first oscillator, and a loud speaker derived by output from said amplifying means.
Claim 2
Dependent Claim
171 words
An electronic musical instrument for simulating percussion sounds which comprises means for generating a voltage whose level varies in accordance with a magnitude of force with which a key is depressed, a first waveforming device for shaping output voltage from said voltage-generating means into that whose waveform has a long period of rising and decaying, a second waveforming device for shaping said output voltage into that whose waveform has a short period of rising and decaying, a first oscillator for generating signal of relatively low frequency modulated in amplitude by output signal from said first waveforming device, a second oscillator for generating signal of relatively high frequency modulated in amplitude by output signal from said second waveforming device, means for further controlling the level of output from said second oscillator modulated in amplitude according to the level of voltage supplied by said voltage-generating means, means for jointly amplifying leveL-controlled output from said second oscillator and output from said first oscillator, and a loud speaker derived by output from said amplifying means.
Claim 3
Dependent Claim
24 words
The instrument according to claim 1 wherein the frequencies of said first and second oscillators are so chosen as not to be harmonically related.
Claim 4
Dependent Claim
32 words
The instrument according to claim 2 wherein the low frequency of said first oscillator is set at about 180 Hz. and the high frequency of said second oscillator at about 330 Hz.
Claim 5
Dependent Claim
32 words
The instrument according to claim 2 wherein the low frequency of said first oscillator is set at about 320 Hz. and the high frequency of said second oscillator at about 800 Hz.
Claim 6
Dependent Claim
32 words
The instrument according to claim 2 wherein the low frequency of said first oscillator is set at about 1,900 Hz. and the high frequency of said second oscillator at about 4,000 Hz.
Claim 7
Dependent Claim
23 words
The instrument according to claim 1 wherein said first and second oscillators are activated by output from said first and second waveforming devices.
Claim 8
Dependent Claim
54 words
The instrument according to claim 1 wherein output voltage from said first waveforming device has a rising period of about 30 msec. and a decaying period of about 500 msec., and output voltage from said second waveforming device has a rising period of about 5 msec. and a decaying period of about 50 msec.
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |