US3598892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controled switching of octaves in an electronic musical instrument
Assignee: Nippon Gakki Co Ltd
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Filing: 1969-10-13
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Granted: 1971-08-10
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Expires: 1989-10-13
Abstract
Abstract A pedal tone section of an electronic musical instrument comprises tone generators of an octave, pedal keys of an octave having associated key switches, a latching selector operated by the key switches and sustainingly selecting one signal out of signals of the tone generators, an octave shifter including a through line and a binary divider selectively operated by a player, the octave shifter providing an output which is either a divided or nondivided signal of the latching selector output. A frequency divider further divides the octave shifter output and a pedal tone signal is generated. Preferably, manipulation of a knee lever operates the octave shifter to shift the tone pitch by an octave and as a result the compass of the pedal keyboard is extensible upward or downward without increasing the number of the pedal keys.
Inventors
- 👤 Maki Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:45
CPC Classifications
G; G10; G10H; G10H5/00; G10H5/02; G10H5/06; Y; Y10; Y10S; Y10S84/00; Y10S84/02; Y10S84/25
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
168 words
A pedal compass extension circuit device comprising: pedal keys; a plurality of tone generators; key switches operated by respectively associated pedal keys; a latching selector coupled to said switches for sustainingly selecting one corresponding signal from said tone generators in response to the operation of a corresponding key switch by a pedal key; an octave shifter coupled to the output of said latching selector and including at least a binary divider and a shifting switch means adapted to be manipulated by a player, said binary divider being selectively rendered operative by the manipulation of said shifting switch means, said octave shifter dividing the output of said latching selector when said binary divider is rendered operative and said octave shifter passing the output of said latching selector undivided when said binary divider is inoperative; a frequency divider further dividing the output signal from said octave shifter; and means keying an output signal from said frequency divider in response to the operation of said key switches by said pedal keys.
Claim 2
Dependent Claim
168 words
A pedal compass extension circuit device comprising: pedal keys; a plurality of tone generators; key switches operated by respectively associated pedal keys; a latching selector coupled to said switches for sustainingly selecting one corresponding signal from said tone generators in response to the operation of a corresponding key switch by a pedal key; an octave shifter coupled to the output of said latching selector and including at least a binary divider and a shifting switch means adapted to be manipulated by a player, said binary divider being selectively rendered operative by the manipulation of said shifting switch means, said octave shifter dividing the output of said latching selector when said binary divider is rendered operative and said octave shifter passing the output of said latching selector undivided when said binary divider is inoperative; a frequency divider further dividing the output signal from said octave shifter; and means keying an output signal from said frequency divider in response to the operation of said key switches by said pedal keys.
Claim 3
Dependent Claim
84 words
The pedal key compass extension circuit according to claim 1, wherein said shifting switch means of said octave shifter includes a switch means having: first and second fixed contacts, said first fixed contact being connected through said binary divider to the output terminal of said latching selector, said second fixed contact being connected directly to said output terminal of said latching selector; and a movable contact piece adapted to be manipulated by said player connected to the input terminal of said frequency divider circuit.
Claim 4
Dependent Claim
148 words
The pedal compass extension circuit according to claim 1, wherein said octave shifter further includes a scale-of-foUr divider and wherein said shifting switch means includes first and second switch means respectively having first and second fixed contacts, and movable contact pieces, the first fixed contact of said first switch means being connected through said binary divider to the output terminal of said latching selector, the second fixed contact of said first switch means being connected directly to a movable contact piece of said second switch means, said first contact of said second switch means being connected directly to the output terminal of said latching selector, the second contact of said second switch means being connected through said scale-of-four divider to the output terminal of said latching selector, and a movable contact piece of said first switch means being connected to the input terminal of said frequency divider circuit.
Claim 5
Dependent Claim
51 words
The pedal compass extension circuit according to claim 2, wherein said switch means is an automatic return type knee lever switch means, said movable contact piece being normally in connection with said first fixed contact and being connected to said second fixed contact only during the operation of said switch means.
Claim 6
Dependent Claim
68 words
The pedal key compass extension circuit according to claim 3, wherein said first switch means is an automatic return type knee lever switch means, said movable contact of said first switch means being normally in connection with the first fixed contact of said first switch means and being connected to the second fixed contact of said first switch means only during the operation of said first switch means.
Claim 7
Dependent Claim
14 words
The pedal compass extension circuit device according to claim 1 comprising 13 pedal keys.
Claim 8
Dependent Claim
30 words
The pedal compass extension circuit device according to claim 6 wherein each of said pedal keys corresponds to respective tones within at least two different octaves of the musical scale.
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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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |