Apparatus for creating an even illumination of a plurality of title blocks

A diaphragm having a plurality of apertures each associated with a title block on the front panel of an indicator unit is provided to cause the various title blocks to be illuminated evenly from a light source positioned behind the diaphragm. The size, number and shape of the apertures is so chosen...

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Bibliographic Details
Main Authors ZOEBL; HARTMUT, WESEMEYER; JURGEN, BRAEUTIGAM; ROLF
Format Patent
LanguageEnglish
Published 17.04.1984
Subjects
ADVERTISING
ALARM SYSTEMS
APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE
ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING ORSUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES INGENERAL
BLASTING
CRYPTOGRAPHY
DIAGRAMS
DISPLAY
DISPLAYING
EDUCATION
EDUCATIONAL OR DEMONSTRATION APPLIANCES
FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF
GLOBES
HEATING
LABELS OR NAME-PLATES
LIGHTING
MECHANICAL ENGINEERING
ORDER TELEGRAPHS
PERFORMING OPERATIONS
PHYSICS
PLANETARIA
SEALS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
SIGNS
STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR
TRANSPORTING
VEHICLES IN GENERAL
WEAPONS
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Summary:A diaphragm having a plurality of apertures each associated with a title block on the front panel of an indicator unit is provided to cause the various title blocks to be illuminated evenly from a light source positioned behind the diaphragm. The size, number and shape of the apertures is so chosen that all of the title blocks are equally illuminated regardless of their size and regardless of their distance to the light source. Indirect light is used to prevent the formation of shadows and light spots on the title blocks.
Bibliography:Application Number: US19810297826