US3728932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick finder for chords
Assignee: Individual
•
Filing: 1971-08-13
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Granted: 1973-04-24
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Expires: 1991-08-13
Abstract
Abstract A device for quickly ascertaining various chords identified with any key signature in the cycle of fourths, the device having two rotatable dials so that the key signature and the chords to be read can be disposed at the top of the device where reading and interpretation is easiest without mental gymnastics required to transpose or invert mentally the chord information provided by the device. For further facilitating the use of the device the inner dial has not only one segment with three principal chords, tonic, dominant and sub-dominant for the selected key signature but three further segments naming the chords otherwise as sixth, and seventh chords and as related to a complete split scale degree arrangement.
Inventors
- 👤 V Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:31
CPC Classifications
G; G09; G09B; G09B15/00; G09B15/001; G09B15/004; G09B15/007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
210 words
A quick finder for chords, comprising: a panel, a smaller dial and a larger dial coaxially mounted on said panel for relative rotation, with the smaller dial outermost so that peripheral areas of the larger dial are visable; the smaller dial having a sector with an outwardly extending tab on the bisector of said sector, and said sector also having indicia circumferentially spaced thereon as positional indicators in split scale arrangement of the V, I and IV degree chords in that order so that said I degree is adjacent to and thus visually associated with said tab; the larger dial having in said peripheral areas the names of the keys in the circle of fourths with associated chords, spaced apart to correspond with said positional indicators of the smaller dial, so that a rotational setting of said smaller dial with said tab and said degree chord indication aligned with any selected one of said names of keys in the larger dial identifies at a glance said associated chords for the I, IV, and V degrees of that key signature, and the rotatability of the larger dial providing for adjustability thereof so that the key signature and chords being read are at the top of the quick finder for easy reading.
Claim 2
Dependent Claim
210 words
A quick finder for chords, comprising: a panel, a smaller dial and a larger dial coaxially mounted on said panel for relative rotation, with the smaller dial outermost so that peripheral areas of the larger dial are visable; the smaller dial having a sector with an outwardly extending tab on the bisector of said sector, and said sector also having indicia circumferentially spaced thereon as positional indicators in split scale arrangement of the V, I and IV degree chords in that order so that said I degree is adjacent to and thus visually associated with said tab; the larger dial having in said peripheral areas the names of the keys in the circle of fourths with associated chords, spaced apart to correspond with said positional indicators of the smaller dial, so that a rotational setting of said smaller dial with said tab and said degree chord indication aligned with any selected one of said names of keys in the larger dial identifies at a glance said associated chords for the I, IV, and V degrees of that key signature, and the rotatability of the larger dial providing for adjustability thereof so that the key signature and chords being read are at the top of the quick finder for easy reading.
Claim 3
Dependent Claim
42 words
A quick finder for chords according to claim I wherein said larger dial has a radially outwardly extending tab positionally adjacent to each of said names of keys, whereby said names of keys and the corresponding I degree indication are visually associated.
Claim 4
Dependent Claim
52 words
A quick finder for chords according To claim 2 wherein said names of keys are twelve in number and the inner dial has four segments each having three of said indicators, the indicators on one segment pointing out said V, I, and IV degree chords as the root, dominant and sub-dominant chords.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |