Patent US3922943A successfully refreshed from Google Patents.
US3922943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic musical instrument provided with a voltage-controlled monophonic playing section operated by a manual or pedal tone-playing section
Assignee: Nippon Gakki Co Ltd
•
Filing: 1974-11-01
•
Granted: 1975-12-02
•
Expires: 1994-11-01
Abstract
Abstract An electronic musical instrument comprises a voltage controlled monophonic playing section as well as conventional manual and pedal tone playing sections. There are provided first and second pitch determining voltage generating circuits operatively coupled with manual and pedal keyboards respectively to generate first and second pitch determining voltage signals the amplitudes of which are functions of the notes of operated keys on the manual and pedal keyboards respectively. First and second trigger signal generating circuits are provided to produce first and second trigger signals indicative of operation of keys on the manual and pedal keyboards. A first switch is provided to selectively couple the first and second pitch determining voltages to the monophonic playing section including a voltage controlled oscillator. A second switch ganged with the first switch selectively couples the first and second trigger signals to an envelope generator for generating a control wave to control the voltage controlled oscillator.
Inventors
- 👤 Naoyuki Niinomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:10
CPC Classifications
G; G10; G10H; G10H5/00; G10H5/002; Y; Y10; Y10S; Y10S84/00; Y10S84/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
297 words
An electronic musical instrument comprising: a manual keyboard having a plurality of keys; a pedal keyboard having a plurality of keys; a manual tone playing section including tone generators, first keyer means coupled to said tone generators and operatively coupled with said manual keyboard, and first tone coloring filter means coupled to said first keyer means; a pedal tone playing section including tone generators, second keyer means coupled to said tone generators and operatively coupled with said pedal keyboard, and second tone coloring filter means coupled to said second keyer meaNs; first key controlled variable voltage source means operatively coupled with said manual keyboard for developing at a single output terminal thereof a first pitch determining voltage signal the amplitude of which is a function of the note of an operated key on said manual keyboard; second key controlled variable voltage source means operatively coupled with said pedal keyboard for developing at a single output terminal thereof a second pitch determining voltage signal the amplitude of which is a function of the note of an operated key on said pedal keyboard; a voltage controlled playing section including a voltage controlled oscillating means reponsive to a pitch determining voltage signal for generating a tone signal the pitch of which is a function of the amplitude of the pitch determining voltage signal; switch means coupled between said first and second key controlled voltage source means and said voltage controlled playing section and including a first switch for selectively coupling outputs of said first and second key controlled voltage source means to said voltage controlled oscillating means; and sound reproducing means coupled to the outputs of said tone coloring filter means of said manual and pedal playing sections and to a tone signal output of said voltage controlled playing section.
Claim 2
Dependent Claim
297 words
An electronic musical instrument comprising: a manual keyboard having a plurality of keys; a pedal keyboard having a plurality of keys; a manual tone playing section including tone generators, first keyer means coupled to said tone generators and operatively coupled with said manual keyboard, and first tone coloring filter means coupled to said first keyer means; a pedal tone playing section including tone generators, second keyer means coupled to said tone generators and operatively coupled with said pedal keyboard, and second tone coloring filter means coupled to said second keyer meaNs; first key controlled variable voltage source means operatively coupled with said manual keyboard for developing at a single output terminal thereof a first pitch determining voltage signal the amplitude of which is a function of the note of an operated key on said manual keyboard; second key controlled variable voltage source means operatively coupled with said pedal keyboard for developing at a single output terminal thereof a second pitch determining voltage signal the amplitude of which is a function of the note of an operated key on said pedal keyboard; a voltage controlled playing section including a voltage controlled oscillating means reponsive to a pitch determining voltage signal for generating a tone signal the pitch of which is a function of the amplitude of the pitch determining voltage signal; switch means coupled between said first and second key controlled voltage source means and said voltage controlled playing section and including a first switch for selectively coupling outputs of said first and second key controlled voltage source means to said voltage controlled oscillating means; and sound reproducing means coupled to the outputs of said tone coloring filter means of said manual and pedal playing sections and to a tone signal output of said voltage controlled playing section.
Claim 3
Dependent Claim
130 words
An electronic musical instrument according to claim 1 further comprising first trigger signal generating means operatively coupled with said manual keyboard for generating a first trigger signal indicative of operation of a key on said manual keyboard; second trigger signal generating means operatively coupled with said pedal keyboard for generating a second trigger signal indicative of operation of a key on said pedal keyboard; and wherein said voltage controlled playing section comprises first control wave generating means coupled to said voltage controlled oscillating means and responsive to a trigger signal for generating a control wave for said voltage controlled oscillating means; and said switch means comprises a second switch ganged with said first switch for selectively coupling the first and second trigger signals to said first control wave generating means.
Claim 4
Dependent Claim
62 words
An electronic musical instrument according to claim 2 wherein said voltage controlled playing section further comprises voltage controlled filter means coupled to said voltage controlled oscillating means; and second control wave generating means coupled to said voltage controlled filter means and responsive to the trigger signal derived from said second switch for generating a control wave for said voltage controlled filter means.
Claim 5
Dependent Claim
63 words
An electronic musical instrument according to claim 3 wherein said voltage controlled playing section further comprises voltage controlled amplifying means coupled to said voltage controlled filter means; and third control wave generating means coupled to said voltage controlled amplifying means and responsive to the trigger signal derived from said second switch for generating a third control wave for said voltage controlled amplifying means.
Claim 6
Dependent Claim
24 words
An electronic musical instrument according to claim 4 wherein said sound reproducing means is coupled to the output of said voltage controlled amplifying means.
Claim 7
Dependent Claim
35 words
An electronic musical instrument according to claim 1 comprising a mixing means coupling said outputs of said manual and playing sections and said output of said voltage controlled playing section to said sound reproducing means.
References Cited (Backward Citations)
US3598892A
Cited
US3671659A
Cited
US3803338A
Cited
US3749807A
Cited
US3828110A
Cited
US3825668A
Cited
US3886836A
Cited
US3886834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |