Exit signs with LED illumination

Details Exit signs with LED illumination Exit signs with LED illumination

1993-01-06

1994-11-15

Price, Carl D.

Illumination

Automatic substitution of power supply or light source

362235, 362249, 362300, 362800, 362812, 40546, 40549, 40570, 40571, F21V 1904, G09F 1318

Patent

active

053654110

ABSTRACT:
A light unit for use in lighted sign assemblies has a housing with a rear wall, upstanding opposed side walls, and shield elements extending inwardly from adjacent the upper ends of the side walls. Light arrays extending along the side walls have light emitting diodes disposed in spaced relationship above the rear wall and below the shield elements, and a diffuser extends across the housing above the shield elements. The rear wall is configured to reflect light emitted from the diodes relatively uniformly across the diffuser which further contributes to relative uniform transmission of light therethrough. The power supply may include a circuit to transform alternating current line voltage into a reduced direct current voltage for the diodes, and the power supply may also provide direct current to the diodes from a battery power source when power is interrupted.

REFERENCES:
patent: 3132811 (1964-05-01), Madansky
patent: 3324290 (1967-06-01), Lasker
patent: 3423865 (1969-01-01), Hardesty et al.
patent: 3517937 (1970-06-01), Glass et al.
patent: 3653138 (1972-04-01), Cooper
patent: 3665626 (1972-05-01), Lund et al.
patent: 3680237 (1972-08-01), Finnerty, Sr.
patent: 3780462 (1973-12-01), Pregel et al.
patent: 3853088 (1974-12-01), Marko
patent: 4271408 (1981-06-01), Teshima et al.
patent: 4385343 (1983-05-01), Plumly
patent: 4424449 (1984-01-01), O'Brill
patent: 4466208 (1984-08-01), Logan, Jr. et al.
patent: 4561203 (1985-12-01), MacDonald, Jr. et al.
patent: 4574269 (1986-03-01), Miller
patent: 4630895 (1986-12-01), Abdala, Jr. et al.
patent: 4682147 (1987-07-01), Bowman
patent: 4694600 (1987-09-01), Murray
patent: 4711044 (1987-12-01), Danjell
patent: 4714983 (1987-12-01), Lang
patent: 4768300 (1988-09-01), Rutili
patent: 4791745 (1988-12-01), Pohn
patent: 4807092 (1989-02-01), Hasegawa
patent: 4819353 (1989-04-01), Glucksman et al.
patent: 4884178 (1989-11-01), Roberts
patent: 4891896 (1990-01-01), Boren
patent: 4918578 (1990-04-01), Thompson
patent: 4922384 (1990-05-01), Torrence
patent: 4929866 (1990-05-01), Murata et al.
patent: 4942685 (1990-07-01), Lin
patent: 4947300 (1990-08-01), Wen
patent: 4954822 (1990-09-01), Borenstein
patent: 4967317 (1990-10-01), Plumly
patent: 4975809 (1990-12-01), Ku
patent: 4977486 (1990-12-01), Gotoh
patent: 4999936 (1991-03-01), Calamia et al.
patent: 5009019 (1991-04-01), Erlendsson et al.
patent: 5012160 (1991-04-01), Thompson
patent: 5018290 (1991-05-01), Kozek et al.
patent: 5027258 (1991-06-01), Schoniger et al.
patent: 5036248 (1991-07-01), McEwan et al.
patent: 5040320 (1991-08-01), Reidinger
patent: 5047907 (1991-09-01), Hawkins
patent: 5124890 (1992-06-01), Choi et al.
patent: 5136483 (1992-08-01), Schoniger et al.
patent: 5151679 (1992-09-01), Dimmick

Affiliated with

Also associated with

Rating

Exit signs with LED illumination does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exit signs with LED illumination, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exit signs with LED illumination will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1102251