General purpose modular acoustic signal generator

Details General purpose modular acoustic signal generator General purpose modular acoustic signal generator

1983-04-29

1986-07-22

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Ultrasonic pest control

310322, 310324, 179110A, G08B 300, H02N 104, H04R 1500

Patent

active

046022457

ABSTRACT:
A general purpose modular acoustic signal generator includes an outer casing unit having a plurality of disengageably connected sections and an insert unit removably positioned in that outer casing unit. The insert unit has a piezoelectric acoustic generator disc mounted thereon and defines a Helmholtz resonator on each side of the acoustic generator disc. A single outer casing is usable with a plurality of different insert units so a single outer casing unit can be associated with a plurality of different Helmholtz resonators.

REFERENCES:
patent: 2444620 (1948-07-01), Williams et al.
patent: 2832843 (1958-04-01), Miessner
patent: 3418437 (1968-12-01), Hoffmann
patent: 3464057 (1969-08-01), Hayner et al.
patent: 3938141 (1976-02-01), Neuhof
patent: 4413198 (1983-11-01), Bost
patent: 4490640 (1984-12-01), Honda

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