Communications: electrical – Land vehicle alarms or indicators – External signal light system
Patent
1988-10-11
1992-08-18
Ng, Jin F.
Communications: electrical
Land vehicle alarms or indicators
External signal light system
116147, 340405, G08B 700
Patent
active
051403048
ABSTRACT:
A light bar system for a motor vehicle including a plurality of forward-facing lights and a plurality of rear-facing lights transversely spaced on a bar across a motor vehicle, sequentially operating the forward-facing lights in a pattern moving from one light to the next light in a pattern in a preferred direction, and simultaneously operating the rear-facing lights in a pattern moving from one light to the next light in a pattern in the direction opposite that of the forward-facing lights; and sequentially operating the lights with a frequency modulating ramp generator optionally driving an acoustic siren and producing an electrical ramp signal of changing frequency, including a means for selecting a series of time-spaced frequencies in the changing frequency ramp signal, and a means for operating at least one specific forward-facing light and one specific rear-facing light in the light bar at each selected frequency of the ramp signal.
A preferred embodiment includes a joy-stick light control switch having a detented central "OFF" position in which the lights are inoperative, and four detented orthogonal positions including "PURSUIT", "TAKE-DOWN", "REAR ONLY" and "PARK" positions selecting programmed light patterns; and a siren control joy-stick switch having a detented "OFF" position, wherein the siren is silent, and four detented orthogonal positions including "SIREN", "P.A.", a "HORN" and "RADIO" positions selecting programmed audio signal functions.
REFERENCES:
patent: 3786498 (1974-01-01), Lipe et al.
patent: 4040050 (1977-08-01), Nunn, Jr.
patent: 4232390 (1980-11-01), McEvilly, Jr.
patent: 4668938 (1987-05-01), Bosnak
patent: 4831357 (1989-05-01), Miller
Ng Jin F.
Swarthout Brent A.
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