Adjustable pitch drum

Details Adjustable pitch drum Adjustable pitch drum

1978-12-21

1980-07-08

Franklin, Lawrence R.

Music

Instruments

Drums

G10D 1302

Patent

active

042111447

ABSTRACT:
An adjustable pitch drum consists of a drum shell having an open end and a drum head pitch changing mechanism and supporting means therefor supported on said shell. The pitch changing mechanism consists of an annular, externally threaded member supported on said drum shell; a drum head clamping hoop supported on said annular member and spaced from the end of said drum shell; and a drum head tensioning hoop supported in spaced relation to the end of said drum shell and engaging the inside of the drum head. Rotation of said drum head and the clamping hoop about said annular member moves the same longitudinally of said drum shell to vary the force exerted against the drum head by the tensioning hoop to vary the pitch of the drum. The tensions hoop is preferably supported on roller bearings supported in spaced relation to the end of the drum shell. The adjustable supporting means in the pitch changing mechanism is located external to the drum shell and thus does not interfere with the sound waves generated inside the drum shell.

REFERENCES:
patent: 578198 (1897-03-01), Boulanger
patent: 1204182 (1916-11-01), O'Conner
patent: 2524592 (1950-10-01), Cordes

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