Card – picture – or sign exhibiting – Illuminated sign – Lamp box
Patent
1991-07-01
1993-11-23
Dorner, Kenneth J.
Card, picture, or sign exhibiting
Illuminated sign
Lamp box
G09F 1304
Patent
active
052632717
ABSTRACT:
An annunciator apparatus has a light directing device that efficiently causes light to pass from a light source, such as a lamp, toward a generally flat surface of the light directing device in an efficient manner. The light pipe of the annunciator incorporates parabolic rear surfaces that are reflective. In addition, discs of partially reflective and partially transmissive material are disposed directly between a light source and the preselected plane toward which light is directed perpendicularly. The annunciator comprises an indicia plate which incorporates layers to accomplish the desired effect of having a reduced reflection characteristic. Indicia are represented on front and back surfaces of a substrate and aligned with each other to define a "pinhole" effect that significantly reduces light reflected back from the light directing device toward the viewer.
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Cox Ronald G.
Karg Marvin D.
Davis Cassandra Hope
Dorner Kenneth J.
Honeywell Inc.
Lanyi William D.
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