Adjustable pitch drum

Details Adjustable pitch drum Adjustable pitch drum

1976-10-12

1977-09-20

Franklin, Lawrence R.

Music

Instruments

Drums

84413, 84411R, G10D 1302

Patent

active

040488950

ABSTRACT:
An adjustable pitch drum consists of a drum shell having an open end, a drum head pitch changing mechanism, and a supporting structure mounting the pitch changing mechanism to the drum shell. The pitch changing mechanism consists of a threaded rod adjustably threaded to the supporting structure, a drum head clamping hoop mounted coaxially on the rod for rotation thereabout, and a drum head tensioning hoop non-rotatably mounted on the other end of the rod. Rotation of the drum head and its clamping hoop about the rod varies the tension of the drum head on the tensioning hoop, thereby changing the pitch of the drum. Movement of the threaded rod in the supporting structure changes the spacing of the drum head from the drum shell open end, thereby changing the resonance characteristics of the drum assembly.

REFERENCES:
patent: 769527 (1904-09-01), Bahr
patent: 1565329 (1925-12-01), Robison
patent: 3279299 (1966-10-01), Murbach
patent: 3376777 (1968-04-01), Becker-Ehmck
patent: 3818791 (1974-06-01), Zickos

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