Laser-aid fire evacuation guidance system

Details Laser-aid fire evacuation guidance system Laser-aid fire evacuation guidance system

2006-01-12

2011-12-13

Lu, Shirley (Department: 2612)

Communications: electrical

Systems

Audible signals

C340S332000

Reexamination Certificate

active

08077017

ABSTRACT:
A fire evacuation guidance system includes a pair of dissimilarly colored laser beams generated by at least one laser emitting device. The dissimilarly colored laser beams are generated substantially parallel to hallways of a (5) structure and subsequently reflected, where required, to direct occupants to a shortest exit route in the event of a fire emergency. That is, a first laser beam of one color is generated substantially parallel to one side of a hallway while a second laser beam of a second color different from the first color is generated substantially parallel to the opposite side of the hallway. So long as an occupant (10) of the structure positions himself or herself between the two laser beams and keeps the laser beam of the first color on his or her right hand side, the occupant will be directed to the closest exit in the event of a fire emergency.

REFERENCES:
patent: 5140301 (1992-08-01), Watanabe
patent: 5575550 (1996-11-01), Appeldorn et al.
patent: 6150943 (2000-11-01), Lehman et al.
patent: 2004/0149860 (2004-08-01), LeCroy, Jr.
patent: 2006/0071802 (2006-04-01), Right et al.

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