Alarm system

Details Alarm system Alarm system

1997-03-27

1999-04-20

Wu, Daniel J.

Communications: electrical

Visual indication

With lamp enclosed in transparent housing

340321, 340332, 3406935, 34081575, G08B 536

Patent

active

058960929

ABSTRACT:
An improved alarm system particularly adapted for use in attracting the attention of hearing impaired persons and/or for use in attracting the attention of persons in high decibel areas, it being understood that the system is applicable to other uses. The system incorporates an improved light reflector and improved Fresnel lenses which cooperate with a flash tube whereby the system projects as much of the available light as possible into a predetermined profile so that UL requirements are met with a minimum of wasted light.

REFERENCES:
patent: 3849769 (1974-11-01), Chiba
patent: 4559589 (1985-12-01), Sassmannshausen
patent: 4912606 (1990-03-01), Yamamoto
patent: 5160192 (1992-11-01), Sugawara
patent: 5582480 (1996-12-01), Zwick et al.
patent: 5641218 (1997-06-01), Sakurai

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