Siren sound sychronized light bar system
First Claim
1. A light bar for a motor vehicle including:
- a plurality of forward-facing lights and a plurality of rear-facing lights arranged in a light bar having a right-hand end, a center and a left-hand end on a line perpendicular to the length of the vehicle;
a frequency-modulating siren ramp generator producing an electrical ramp signal of linearly changing audio frequency between a high and low acoustic pitch;
a frequency divider for selecting a series of time-spaced frequency bands in the changing frequency ramp signal;
a light selection programmer sequentially operating the lights in any one of a plurality of programmed modes in which at least one specific light is operated in the light bar at each selected frequency band of the frequency divider;
a light control switch having a plurality of mode positions that select the respective programmed modes of the light selection programmer;
an acoustic speaker siren driven by the frequency modulating ramp generator; and
a siren control switch having a plurality of mode positions that select operating modes for the acoustic speaker siren.
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Accused Products
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.
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Citations
18 Claims
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1. A light bar for a motor vehicle including:
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a plurality of forward-facing lights and a plurality of rear-facing lights arranged in a light bar having a right-hand end, a center and a left-hand end on a line perpendicular to the length of the vehicle; a frequency-modulating siren ramp generator producing an electrical ramp signal of linearly changing audio frequency between a high and low acoustic pitch; a frequency divider for selecting a series of time-spaced frequency bands in the changing frequency ramp signal; a light selection programmer sequentially operating the lights in any one of a plurality of programmed modes in which at least one specific light is operated in the light bar at each selected frequency band of the frequency divider; a light control switch having a plurality of mode positions that select the respective programmed modes of the light selection programmer; an acoustic speaker siren driven by the frequency modulating ramp generator; and a siren control switch having a plurality of mode positions that select operating modes for the acoustic speaker siren. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification