US3722344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic musical instrument having tone start pitch fluctuation arrangement
Assignee: Nippon Gakki Co Ltd
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Filing: 1971-12-23
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Granted: 1973-03-27
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Expires: 1991-12-23
Abstract
Abstract An electronic musical instrument including tone generators for generating tone signals each having predetermined tone pitches constituting a musical scale and tone keyers for respectively keying the tone signals, is further provided with a circuit arrangement for fluctuating the pitch of the tone at the start of the tone. The arrangement comprises a detector for detecting the start of the tone signal being played and a pulse generator producing a pulse signal upon receipt of the detected signal and controlling the tone generators to fluctuate the pitches thereof at the start of the tone signals. This simulates the sound of natural musical instruments very closely.
Inventors
- 👤 A Nakada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:05
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/06; G10H1/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
109 words
An electronic musical instrument comprising: tone generators generating tone signals; tone keyers connected to said tone generators and keying said tone signals; a tone signal coupling means connected to said tone keyers and coupling the keyed tone signal to an output; a detector means connected to said tone signal coupling means for detecting a start of said keyed tone signal; a pulse generator connected to the output of said detector means for producing a pulse signal upon detection of the start of said keyed tone signal by said detector means; and means for coupling said pulse signal to said tone generators for fluctuating the frequencies of said tone signals.
Claim 2
Dependent Claim
109 words
An electronic musical instrument comprising: tone generators generating tone signals; tone keyers connected to said tone generators and keying said tone signals; a tone signal coupling means connected to said tone keyers and coupling the keyed tone signal to an output; a detector means connected to said tone signal coupling means for detecting a start of said keyed tone signal; a pulse generator connected to the output of said detector means for producing a pulse signal upon detection of the start of said keyed tone signal by said detector means; and means for coupling said pulse signal to said tone generators for fluctuating the frequencies of said tone signals.
Claim 3
Dependent Claim
27 words
An electronic musical instrument according to claim 1 wherein said detector means comprises an amplitude limiter and a rectifier coupled to the output of said amplitude limiter.
Claim 4
Dependent Claim
48 words
An electronic musical instrument according to claim 1 wherein said tone generators include master oscillators generating tone signals of the notes in the highest octave and multistage frequency dividers cascade connected to each of said master oscillators for generating tone signals of the notes in the subsequent octaves.
Claim 5
Dependent Claim
17 words
An electronic musical instrument according to claim 1 wherein said pulse generator includes a one shot multivibrator.
Claim 6
Dependent Claim
102 words
An electronic musical instrument according to claim 1 which further comprises a white noise source generating white noise signals, and a filter connected to the output of said white noise source, and said means coupling said pulse signal to said tone generators comprises a gate circuit having an input thereof coupled to said filter and the output thereof coupled to said tone generators, said pulse generator being connected to another input of said gate circuit and controlling said gate circuit to gate the white noise signal to said tone generators the gated white noise signal fluctuating the frequencies of said tone signals.
References Cited (Backward Citations)
US2697959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |