US3794747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic musical instrument
Assignee: Kawai Musical Instruments Manufacturing Co Ltd
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Filing: 1972-05-09
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Granted: 1974-02-26
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Expires: 1992-05-09
Abstract
Abstract An electronic musical instrument comprising an oscillator, first and second multiplex counter circuits synchronously driven in common by said oscillator, first and second matrix circuits coupled respectively to said counter circuits for producing respective sequences of pulses, a common conductor, said matrix circuits including a plurality of output terminals, switches connecting the output terminals of said first matrix circuit to said conductor, a pulse selective circuit coupled to said conductor and to the output terminals of said second matrix circuit, sound means, and gating means controlled by said pulse selective circuit to control the output of said sound means.
Inventors
- 👤 N Obayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:23
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/18; G10H1/182
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
An electronic musical instrument comprising an oscillator, first and second multiplex counter circuits synchronously driven in common by said oscillator, first and second matrix circuits coupled respectively to said counter circuits for producing respective sequences of pulses, a common conductor, said matrix circuits including a plurality of output terminals, switches connecting the output terminals of said first matrix circuit to said conductor for selectively transferring signals from said first matrix circuit to said conductor, a pulse selective circuit coupled to said conductor and to the output terminals of said second matrix circuit, sound means, a speaker and gating means coupled between said sound means and speaker and being coupled to and controlled by said pulse selective circuit, said pulse selective circuit responding to signals on said conductor and from said second matrix circuit to control said gating means.
Claim 2
Dependent Claim
138 words
An electronic musical instrument comprising an oscillator, first and second multiplex counter circuits synchronously driven in common by said oscillator, first and second matrix circuits coupled respectively to said counter circuits for producing respective sequences of pulses, a common conductor, said matrix circuits including a plurality of output terminals, switches connecting the output terminals of said first matrix circuit to said conductor for selectively transferring signals from said first matrix circuit to said conductor, a pulse selective circuit coupled to said conductor and to the output terminals of said second matrix circuit, sound means, a speaker and gating means coupled between said sound means and speaker and being coupled to and controlled by said pulse selective circuit, said pulse selective circuit responding to signals on said conductor and from said second matrix circuit to control said gating means.
Claim 3
Dependent Claim
16 words
An instrument as claimed in claim 1 wherein said sound means produces outputs of different frequencies.
Claim 4
Dependent Claim
17 words
An instrument as claimed in claim 1 wherein said sound means produces outputs for generating different tones.
Claim 5
Dependent Claim
17 words
An instrument as claimed in claim 2 wherein said sound means produces outputs for generating different tones.
Claim 6
Dependent Claim
51 words
An instrument as claimed in claim 1, said pulse selective circuit includes flip flops including set and reset terminals and wherein said instrument further comprises a NOT circuit connected between the said conductor and reset terminals of the flip flops of the pulse selective circuit to reset the said flip flops.
Claim 7
Dependent Claim
28 words
An instrument as claimed in claim 1 comprising an OR gate connecting the switches to said common conductor and via the common conductor to said pulse selective circuit.
Claim 8
Dependent Claim
27 words
An instrument as claimed in claim 1 comprising a third matrix associated with the second matrix and coupled to the pulse selective circuit to reset the latter.
Claim 9
Dependent Claim
59 words
An instrument as claimed in claim 1, said pulse selective circuit including flip flops including set and reset terminals and wherein said instrument further comprises a third matrix associated with the second matrix and coupled to said counter circuits and coupled to the reset terminals of the flip flops of the pulse selective circuit to reset said flip flops.
Claim 10
Dependent Claim
212 words
An electronic musical instrument comprising an oscillator, first and second multiplex counter circuits synchronously driven in common by said oscillator, first and second matrix circuits coupled respectively to said counter circuits for producing respective sequences of pulses, first and second common conductors, said matrix circuits including a plurality of output terminals, switches connecting the output terminals of said first matrix circuit to said conductors for selectively transferring signals from said first matrix circuit to said conductors, a pulse selective circuit coupled to said conductors and to the output terminals of said second matrix circuit, sound means, a speaker and gating means coupled between said sound means and speaker and being coupled to and controlled by said pulse selective circuit, said pulse selective circuit responding to signals on said conductors and from said second matrix circuit to control said gating means, said pulse selective circuit including flip flops including set and reset terminals and said switches including first output terminals connected to said first conductor, second output terminals, and switch blades selectively connecting said first or second output terminals to said first matrix circuit, said second conductor being connected between said second output terminals and the reset terminals of the flip flops of the pulse selective circuit to reset the said flip flops.
Claim 11
Dependent Claim
212 words
An electronic musical instrument comprising an oscillator, first and second multiplex counter circuits synchronously driven in common by said oscillator, first and second matrix circuits coupled respectively to said counter circuits for producing respective sequences of pulses, first and second common conductors, said matrix circuits including a plurality of output terminals, switches connecting the output terminals of said first matrix circuit to said conductors for selectively transferring signals from said first matrix circuit to said conductors, a pulse selective circuit coupled to said conductors and to the output terminals of said second matrix circuit, sound means, a speaker and gating means coupled between said sound means and speaker and being coupled to and controlled by said pulse selective circuit, said pulse selective circuit responding to signals on said conductors and from said second matrix circuit to control said gating means, said pulse selective circuit including flip flops including set and reset terminals and said switches including first output terminals connected to said first conductor, second output terminals, and switch blades selectively connecting said first or second output terminals to said first matrix circuit, said second conductor being connected between said second output terminals and the reset terminals of the flip flops of the pulse selective circuit to reset the said flip flops.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |