Reverberating mechanical siren

Details Reverberating mechanical siren Reverberating mechanical siren

2006-06-27

2006-06-27

Fulton, Christopher W. (Department: 2859)

Signals and indicators

Sirens

C116S13700R

Reexamination Certificate

active

07066106

ABSTRACT:
A small light mechanical siren for mobile emergency equipment which utilize spiral rebound ramps in the rotor to produce a loud penetrating square form spiral sound wave, enabling effective warning without contributing to noise pollution.

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patent: 3803388 (1989-08-01), None
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