US3872765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chord selection apparatus for an electronic musical instrument
Assignee: Pioneer Corp
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Filing: 1973-12-27
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Granted: 1975-03-25
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Expires: 1993-12-27
Abstract
Abstract A chord selection apparatus for an electronic musical instrument is disclosed which permits commonly used chords to be played by simple manipulation. The instrument is provided with a key tone selection switch and chord pattern selection switches. By previously selecting a chord pattern, such as major, minor, seventh, etc., the player can play that chord pattern in the desired key by depressing the appropriate key, i.e., C, F , etc., in the key selection switch or, alternatively, the appropriate key may be selected and various chord patterns in that key may be played.
Inventors
- 👤 Toshiyuki Amaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:56
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/36; G10H1/38; G10H1/386; Y; Y10; Y10S; Y10S84/00; Y10S84/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
191 words
A chord selection apparatus for an electronic musical instrument comprising: a. first and second ring-counters for generating in synchronism count outputs at output terminals thereof in consecutive order, b. a plurality of registers enabled by signals from the output terminals of said first ring-counter, c. a plurality of key-tone selection switches connected to the output terminals of said first ring-counter, d. means for shifting the synchronous timing of said second ring-counter with respect to said first ring-counter, when any one of said key-tone switches is closed, the shift in timing being a function of the closed key-tone switch, e. a plurality of chord matrices connected to the output terminals of said second ring-counter, each of said chord matrices corresponDing to a certain chord, f. a plurality of chord pattern selection switches for selecting any one of said chord matrices and applying the output thereof to all of said registers, said registers providing an output upon the coincidence of signals from said first ring-counter and one of said chord matrices, and g. a plurality of signal gates corresponding to each tone scale and opened in response to the outputs of said registers.
Claim 2
Dependent Claim
191 words
A chord selection apparatus for an electronic musical instrument comprising: a. first and second ring-counters for generating in synchronism count outputs at output terminals thereof in consecutive order, b. a plurality of registers enabled by signals from the output terminals of said first ring-counter, c. a plurality of key-tone selection switches connected to the output terminals of said first ring-counter, d. means for shifting the synchronous timing of said second ring-counter with respect to said first ring-counter, when any one of said key-tone switches is closed, the shift in timing being a function of the closed key-tone switch, e. a plurality of chord matrices connected to the output terminals of said second ring-counter, each of said chord matrices corresponDing to a certain chord, f. a plurality of chord pattern selection switches for selecting any one of said chord matrices and applying the output thereof to all of said registers, said registers providing an output upon the coincidence of signals from said first ring-counter and one of said chord matrices, and g. a plurality of signal gates corresponding to each tone scale and opened in response to the outputs of said registers.
Claim 3
Dependent Claim
54 words
A chord selection apparatus as recited in claim 1 wherein said means for shifting comprises a differentiator connected to said plurality of key-tone selection switches for generating a reset pulse in response to an output of said first ring-counter passed by a closed key-tone switch, said reset pulse being applied to said second ring-counter.
Claim 4
Dependent Claim
50 words
A chord selection apparatus as recited in claim 1 further comprising a clock pulse generator for generating two clock pulse signals having different phases, one of said clock pulse signals being applied to said first ring-counter and the other of said clock pulse signals being applied to said second ring-counter.
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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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |