Networked communication devices

Details Networked communication devices Networked communication devices

2008-05-06

2008-05-06

Tweel, Jr., John (Department: 2612)

Communications: electrical

Aircraft alarm or indicating systems

C340S953000, C702S182000

Reexamination Certificate

active

07369062

ABSTRACT:
An aircraft emergency lighting system includes a plurality of light units arranged to guide passengers to and to identify exits in an emergency. The light units communicate wirelessly with a remote master control unit operable from the cockpit using a low power spread spectrum signal centered on a single frequency to avoid interference with onboard aircraft control and communication systems. The light units are arranged to receive and transmit any signal to and from the master controller whereby only some of the light units need be within range of the master controller. The light units include battery operated LEDs and cycle between an inoperable (sleep) condition and an operable (awake) condition to conserve power consumption and extend battery life.

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