Outdoor warning siren

Details Outdoor warning siren Outdoor warning siren

1988-04-26

1989-07-11

Crosland, Donnie L.

Communications: electrical

Audible indication

Pneumatic-type sound producer

340404, 340384R, 381156, 181143, 181144, 181175, 181188, 116137R, 116147, G08B 300, G10K 700

Patent

active

048475904

ABSTRACT:
An improved outdoor warning siren comprising an electromechanical siren together with a multi-segment horn which effects an exceptionally smooth transition from a small high pressure area at the horn inlet to a larger low pressure area at the horn outlet thereby producing increased sound output with reduced power requirements.

REFERENCES:
patent: 1149583 (1915-08-01), Hutchison
patent: 4529969 (1985-07-01), Gosswiller
patent: 4558656 (1985-12-01), Powell

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