Pneumatic sound generator

Details Pneumatic sound generator Pneumatic sound generator

1979-02-21

1981-02-24

Swisher, S. Clement

Signals and indicators

Horns, whistles and compressional wave generators

Diaphragm horns

B06B 118, B06B 120

Patent

active

042520770

ABSTRACT:
A pneumatic sound generator, such as an automobile horn, comprises a genely cup-shaped housing spanned by a membrane that rests against a central tubular boss forming a seat for the mouthpiece of a cornet through which air admitted into the housing via a lateral inlet escapes as the oscillating membrane is lifted off the boss. The cornet abuts an inner annular shoulder of the boss, together with a tubular insert which is either thermoplastic, received between the metallic cornet and housing, or metallic, seated within the mouthpiece of the thermoplastic cornet. In either case, the thermoplastic part--which preferably has a polygonal or corrugated inner cross-section--is tightly squeezed between two metallic members forcing an annular bead thereof into a surrounding groove of the inner periphery of the boss to form therewith an airtight seal.

REFERENCES:
patent: 1663648 (1928-03-01), Cooper
patent: 2918895 (1959-12-01), Buell

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