发明授权
US4288784A Light and alarm device 失效
灯和报警装置

Light and alarm device
摘要:
In an audio visual alarm device that can be mounted on a wall or a post an enclosure with an automatic dusk to dawn security light, a selectively energizable rotating signal light and an audible electrically actuated siren. A remotely controlled relay energizes the alarm and a circuit arranged to extinguish the security light upon actuation of the alarm.
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