Noise making device

Details Noise making device Noise making device

1961-10-11

1980-01-08

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

116 27, 367 1, H04B 1100

Patent

active

041830083

ABSTRACT:
4. An underwater noise generator comprising a thick-walled hollow cylindrl housing, said housing having continuous inner and outer cylindrical surfaces and at least one hollow portion between said inner and outer surfaces; a spindle rotatably mounted within said housing along the longitudinal axis thereof, means for rotating said spindle, and a roller mounted on said spindle and driven thereby in rolling contact with said inner surface of said housing, said roller having a plurality of grooves cut in the exterior surface thereof, whereby sound is produced as said rollers roll on said cylindrical housing.

REFERENCES:
patent: 1109811 (1914-09-01), Wood
patent: 2395862 (1946-03-01), Freeman et al.
patent: 2548905 (1951-04-01), Odenweller et al.
patent: 2710458 (1955-06-01), Reed
patent: 2981927 (1961-04-01), McKenney

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