Music – Instruments – Drums
Patent
1977-09-21
1980-02-19
Franklin, Lawrence R.
Music
Instruments
Drums
84419, G10D 1302, G10D 1304
Patent
active
041888529
ABSTRACT:
A tuning system has been devised for timpani and similar percussion instruments of the type having a removable head or skin positioned across the upper end of a sound chamber and terminating in an outer edge surrounding the upper circular edge of the chamber with a hoop or other suitable bead affixed around its outer edge. In order to facilitate ease of replacement of the head, a hoop retainer is provided with open-throated connectors at spaced circumferential intervals each adapted to receive the upper enlarged end of a tuning post assembly which forms a part of each of a series of tuning units comprising the tuning system. Each tuning post assembly is so constructed and arranged as to permit simultaneous adjustment through a common chain drive to loosen or tighten the head in order to change its pitch; and further to permit individual vertical adjustment of each tuning post assembly to effect localized changes in pitch by loosening or tightening the head in the area adjacent to that tuning unit. In either case, tightening or loosening of the head is effected through the vertical adjustment of the post assembly in causing the enlarged cap to bear against the hoop connector under varying degrees of pressure; and at the same time, the cap is so positioned within the slotted hoop connector as to permit quick disconnection simply by loosening of the caps a sufficient distance to raise them above the surface of the connectors whereupon the hoop receiver and associated connectors can be twisted and removed from engagement from the tuning units followed by replacement of the head.
REFERENCES:
patent: 674550 (1901-05-01), Zeidler
patent: 835173 (1906-11-01), Agne
patent: 2172578 (1939-09-01), Gladstone
patent: 2173443 (1939-09-01), Schuman
patent: 2587310 (1952-02-01), Goodman
patent: 3646843 (1972-03-01), Kregal
patent: 3685389 (1972-08-01), Bemben
Franklin Lawrence R.
Reilly John E.
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