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US 4,060,018 AGranted
Banjo drumhead
OwnerDonald A. Gilbrechinventor
Life of this patent
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Abstract
An improved banjo drumhead having a circumferential body rim and a separate tone ring which receives the head membrane stretched over it, the tone ring being supported relative to the body rim by a number of cantilevered support columns extending from the body rim, the head membrane being stretched over the tone ring and affixed to the body rim so that the only mechanical connection between the tone ring and the body rim is the plurality of cantilevered support columns permitting the tone ring to achieve independent vibrational movement relative to the body rim.
Claims9
An improved banjo drumhead comprising:
- a circumferential body rim having an upper and lower end;
- a plurality of spaced apart elongated cantilevered support columns each affixed at the lower end to said body rim at a point on said body rim below said upper end, and extending above and being spaced from said upper end, each support column being in a plane parallel to the rim axis;
- a circumferential tone ring of diameter substantially equal to said body rim, the tone ring having an upper and a lower surface, the lower surface having means engaging the upper end of said support columns whereby said tone ring is supported adjacent to and spaced from said body rim in a plane parallel and coaxial with said body rim upper end, the upper surface of said tone ring being configured to receive a head membrane;
- a circular head membrane stretched over said tone ring upper surface;
- and
- means securing the circumferential periphery of said head membrane to said body rim, said cantilevered support columns permitting vibrational movement of said tone ring relative to said body rim.
3 more elements
Dependencies are inferred from the claim text.