US3795754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic musical instruments with two master oscillators
Assignee: Nippon Gakki Co Ltd
•
Filing: 1972-03-01
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Granted: 1974-03-05
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Expires: 1992-03-01
Abstract
Abstract A tone-generator for electronic musical instruments comprising first and second master oscillators of different oscillation frequencies by a semi-tone and 12 master frequency dividers respectively corresponding to 12 notes in an octave, the output of the first master oscillator being applied to first six of the master frequency dividers respectively having frequency dividing ratios to produce every other note along the chromatic scale in an octave, and the output of the second master oscillator being applied to second six of the master frequency dividers respectively having frequency dividing ratios to produce remainder of the notes in the octave.
Inventors
- 👤 Y Mochida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:29
CPC Classifications
G; G10; G10H; G10H5/00; G10H5/02; G10H5/06; Y; Y10; Y10S; Y10S84/00; Y10S84/11
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
A tone generator for electronic musical instruments comprising first and second master oscillators of different oscillation frequencies and a plurality of master frequency dividers corresponding respectively to all of the notes in an octave, the output of said first master oscillator being applied to a first plurality of said master frequency dividers corresponding to every other note in said octave, and the output of said second master oscillator being applied to a second plurality of said master frequency dividers corresponding to the remainder of the notes in said octave.
Claim 2
Dependent Claim
89 words
A tone generator for electronic musical instruments comprising first and second master oscillators of different oscillation frequencies and a plurality of master frequency dividers corresponding respectively to all of the notes in an octave, the output of said first master oscillator being applied to a first plurality of said master frequency dividers corresponding to every other note in said octave, and the output of said second master oscillator being applied to a second plurality of said master frequency dividers corresponding to the remainder of the notes in said octave.
Claim 3
Dependent Claim
40 words
A tone generator as set forth in claim 1 wherein the number of said plurality of master frequency dividers is 12, corresponding to the 12 notes in said octave, and said first and second pluralities are six in number, respectively.
Claim 4
Dependent Claim
48 words
A tone generator as set forth in claim 1 wherein said octave is the highest frequency octave in the electronic musical instrument, and subsequent octaves can be obtained by dividing the frequencies of said notes into halves by the use of a plurality of 1/2 -frequency dividers, successively.
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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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |