Buzzer with a sound film and equalizing or whirlpool sound mecha

Details Buzzer with a sound film and equalizing or whirlpool sound mecha Buzzer with a sound film and equalizing or whirlpool sound mecha

1999-05-26

2000-10-03

Hofsass, Jeffery A.

Communications: electrical

Audible indication

Diaphragm

3403841, 3403111, 3404071, 3403911, 381340, 381341, 381342, 381343, G10K 900

Patent

active

061279188

ABSTRACT:
A buzzer includes a base with an upper opening, a vibrating plate fixed on the upper opening of the base, a sound film fixed flatly on the vibrating plate, and an equalizing or whirlpool sound mechanism for transmitting the sound produced by the vibrating plate to enhance dB of medium and high sound of a wide range and to reach far. Thus the buzzer has overwhelming sounding effect and sweet tone.

REFERENCES:
patent: 3942029 (1976-03-01), Kawakami et al.
patent: 4378471 (1983-03-01), Shintaku
patent: 4392747 (1983-07-01), Kumada et al.
patent: 4439640 (1984-03-01), Takaya
patent: 5742696 (1998-04-01), Walton

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