Speaker circuit resident notification appliances

Details Speaker circuit resident notification appliances Speaker circuit resident notification appliances

2011-08-02

2011-08-02

Zimmerman, Brian A (Department: 2612)

Communications: electrical

Condition responsive indicating system

With particular system function

C340S533000, C340S286020

Reexamination Certificate

active

07990261

ABSTRACT:
Both notification appliances and speakers usable to broadcast verbal messages into a region can be coupled to common signal and power providing communication lines. Composite output modules can include speakers, horns, and strobe lights, all without limitation, which can be independently driven and controlled from a common pair of lines.

REFERENCES:
patent: 4881058 (1989-11-01), Berry, III
patent: 2007/0035407 (2007-02-01), Capowski et al.

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