Communications: electrical – Land vehicle alarms or indicators – External signal light system
Patent
1995-06-22
1997-07-01
Mullen, Thomas
Communications: electrical
Land vehicle alarms or indicators
External signal light system
340331, 340468, 340474, 362 74, 362251, B60Q 100
Patent
active
056442912
ABSTRACT:
A system and method for generating and broadcasting emergency lighting signals wherein the lights are synchronized such that when a first light is energized with a packet of short, rapid bursts, a second light begins to flash before the first light is de-energized. Control circuitry connected to the power source selectively controls the packetized energization of the light sources and includes timing circuitry for periodically energizing a first of the light sources for a first duration and for energizing a second of the light source for a second duration. The second duration overlaps, but is not coincident with the first duration in a repeating pattern such that the first and second sources are periodically energized simultaneously before the first source is de-energized.
REFERENCES:
patent: 4189709 (1980-02-01), Gosswiller
patent: 4595904 (1986-06-01), Gosswiller et al.
patent: 5097397 (1992-03-01), Stanuch et al.
patent: 5296840 (1994-03-01), Gieffers
patent: 5422623 (1995-06-01), Bader et al.
Product Brochure for SignalMaster.TM. Directional Light Systems, Federal Signal Corporation, 1994.
Specifications for SignalMaster.TM. Directional Light Systems, Federal Signal Corporation, May 21, 1993.
Federal Signal Corporation
Mullen Thomas
Woods Davetta C.
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