Slide rule chord selector
Abstract
Abstract A SIMPLE MECHANICAL DEVICE FOR INSTANT FINDING OF THE NAMES AND POSITION OF THE NOTES IN THE CHROMATIC SCALE USED IN BUILDING THE VARIOUS CHORDS AND POLYCHORDS INCLUDING THE THIRTEENTH CHORD. THIS CHORD FINDER IS CONSTRUCTED FROM SHEET MATERIAL WITH A STRIP BODY PORTION AND AN ELONGATED SLIDE, A RETURN FLAP ON THE BOTTOM EDGE OF THE STRIP BODY PORTION FUNCTIONING AS A RAIL UPON WHICH THE SLIDE IS SADDLED FOR LONGITUDINAL SLIDING ADJUSTMENT. THE LATTER CARRIES A CHROMATIC SCALE OF TWO OR MORE OCTAVES WITH FLATTED TONES ON ONE SIDE AND SHAPED TONES ON THE OTHER SIDE, BOTH SCALES BEING DIMENSIONED AND ARRANGED TO BE READ IN REFERENCE TO CHORD INDICATIONS ON THE BODY PORTION. THE SLIDE IS FOLDABLE TO FACILITATE HANDLING AND STORAGE WHEN NOT IN USE.
Inventors
- 👤 Verna M Leonard
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |