G - Physics
10
D
84/60
G10D 13/02 (2006.01)
Patent
CA 1127885
CANADA "IMPROVEMENTS IN ACOUSTIC DRUMS" Abstract of the disclosure A musical drum has a hollow elongate body of resin impregnated glass fibre, open at both ends. A membrane is stretched across one end and secured thereto. The said end is circular and the body has a cylindrical portion including the said end and then has a flared portion with a curved central axis. The flared portion terminates in a generally oval opening and includes a hollow ridge. In use of the drum, two notes are produced, one at the centre of the open end and the other, an octave lower, in the ridge; A base drum incorporating the invention is also described. -1-
338675
Ridout & Maybee Llp
Townshend Patrick C.
LandOfFree
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