Education and demonstration – Means for demonstrating apparatus – product – or surface... – Plaque to selectively align different points on plaque...
Patent
1995-12-27
1998-01-20
Hafer, Robert A.
Education and demonstration
Means for demonstrating apparatus, product, or surface...
Plaque to selectively align different points on plaque...
84474, 84473, G09B 2500, G09B 1502
Patent
active
057095523
ABSTRACT:
A rotary disk calculator and educational aid is provided to assist in learning and understanding the relation between various musical keys on an instrument according to the circle of fifths system. A base plate member or disk is divided into twelve root key positions. An intermediate or second disk or template is concentrically mounted on the base disk. The structure of the second disk is alignable at various positions with each of the root key positions on the base plate. Indicators are formed on the second disk for ease of alignment. When aligned with a particular root key position, the second disk indicates the key signature (specific sharps or flats) that a piece of music has in that key; the number of whole or half steps between notes; notes for chords used in that key; and any special relationship linking certain of the notes. A third or outer disk member concentrically mounted for rotation with the other disks represents the relations of the keys according to the ascending (clockwise) or descending (counter-clockwise) circle or spiral of fifths and provides a sight reference for alignment purposes.
REFERENCES:
patent: 236896 (1881-01-01), Knapp
patent: 337320 (1886-03-01), Goodwin
patent: 359829 (1887-03-01), Withers
patent: 490509 (1893-01-01), Showalter
patent: 854572 (1907-05-01), Fitch
patent: 954436 (1910-04-01), Hunter
patent: 1643303 (1927-09-01), Jones
patent: 1804460 (1931-05-01), Cordier
patent: 2542235 (1951-02-01), Clopton
patent: 3472117 (1969-10-01), Iverson
patent: 3572205 (1971-03-01), Scholfield
patent: 3592099 (1971-07-01), Gibby
patent: 3728932 (1973-04-01), Leonard
patent: 3884112 (1975-05-01), Leonard
patent: 3884113 (1975-05-01), Leonard
patent: 3884115 (1975-05-01), Leonard
patent: 3960046 (1976-06-01), Choong
patent: 3969973 (1976-07-01), Pandapas
patent: 4305323 (1981-12-01), Graham
patent: 4881443 (1989-11-01), Bertram
patent: 4961362 (1990-10-01), Gunn
patent: 5173566 (1992-12-01), Hiracka
patent: 5288234 (1994-02-01), Hamzi
patent: 5320020 (1994-06-01), Corley
patent: 5370539 (1994-12-01), Dillard
The New Harvard Dictionary of Music, 1986, pp. 169-170.
Harvard Dictionary of Music, Second Ed., pp. 171-172.
Fossum Laura
Hafer Robert A.
LandOfFree
Music education aid does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Music education aid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Music education aid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-721414