Communications: electrical – Land vehicle alarms or indicators – External signal light system
Patent
1997-09-18
1999-03-02
Zimmerman, Brian
Communications: electrical
Land vehicle alarms or indicators
External signal light system
340472, 340468, 340478, 362 32, 362 80, B60Q 152
Patent
active
058776818
ABSTRACT:
A lighting system and method for broadcasting colored lights as emergency warning signals from a light source. A centralized continuous light source is coupled via a fiber optic transmission medium to an external display location such as a lens or the like located on a vehicle. The color and the relative intensity of each color is periodically modulated to alternate between at least two states such that the contrast between these alternating states is perceived by observers to be a flashing source of light with no off-time. The frequency and the duty cycle of the repetition rate of alternating between the states may be further controlled to better draw attention to the light source.
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Cassarly William J.
Davenport John M.
Hansler Richard L.
Hilburger Dennis J.
Jozwik Jacek J.
Edwards, Jr. Timothy
Federal Signal Corporation
General Electric Company
Zimmerman Brian
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