Hand-held sound generating device

Details Hand-held sound generating device Hand-held sound generating device

1995-02-14

1997-10-07

Cheng, Joe

Education and demonstration

Means for demonstrating apparatus, product, or surface...

434169, 381159, 446397, G09B 2500

Patent

active

056740760

ABSTRACT:
A sound generator consists of a housing defining open first and second ends and an internal passage extending therebetween. A speaker is positioned within the housing, and a control arrangement including a circuit board is interconnected with the speaker. The circuit board is preferably located within the internal cavity, and a manually actuable switching arrangement is accessible from the exterior of the housing and interconnected with the circuit board for controlling the output therefrom to the speaker to control the sound generated by the speaker. In one form, the switches are accessible via a control portion formed on a wall of the housing, and in another form the switches are accessible through a movable shield member or sleeve mounted to the housing having an opening providing access to certain of the switches. Grills are positioned within the open ends of the housing, to enable sound waves to escape from both sides of the speaker, with the internal passage having a length ensuring that the emanating sound waves do not cancel each other.

REFERENCES:
patent: 3541452 (1970-11-01), Disesa et al.
patent: 4968255 (1990-11-01), Lee et al.
patent: 5097513 (1992-03-01), Jordan et al.
patent: 5125866 (1992-06-01), Arad et al.
patent: 5154614 (1992-10-01), Matsuoka et al.
patent: 5209665 (1993-05-01), Billings et al.
patent: 5368308 (1994-11-01), Darnell

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