Sound producing ball

Details Sound producing ball Sound producing ball

1985-04-26

1987-05-05

Pinkham, Richard C.

Music

Instruments

84DIG2, 84DIG7, 273 58E, 273 58G, 446408, G10H 100, G10H 504

Patent

active

046622608

ABSTRACT:
A sound producing device producing different notes when rotated. Three orthagonally mounted gravity switches produce signals corresponding to their orientation to a reference. A multiplexer or programmable counter coupled to the switches selects one output line for each combination of states of the switches. Each output is passed through different values of resistance so that unique frequencies result. The output of the multiplexer is coupled through an oscillator to a speaker and a tone corresponding to the frequency of the output selected is produced. Multivibrators are coupled to the switches and to the oscillator to shut off the production of sound when the device has been left at rest for a certain time period.

REFERENCES:
patent: 2504650 (1950-04-01), Chessrown
patent: 3304651 (1967-02-01), Deyerl
patent: 3935669 (1976-02-01), Potrzuski et al.
patent: 4043241 (1977-08-01), Liu
patent: 4318245 (1982-03-01), Stowell et al.
patent: 4337948 (1982-07-01), Breslow et al.

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