Illuminated traffic signal for color blind persons

Communications: electrical – Traffic control indicator

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G08G 1095

Patent

active

048396478

ABSTRACT:
A traffic signal control which is designed for color-blind persons, and has a unique geometric shape for the information to be conveyed. The traffic signal control has a central illuminated region of the specific geometric shape, bordered by an opaque region about which is provided a translucent track of white-light of the same geometric shape, which in turn is surrounded by another opaque strip of the same shape. When the control is for a "stop" signal, the central region is made of a red filter, and for the "go", it is made of a green filter. The white light is of a greater intensity than the light emanating from the central region, so that the color blind person may recognize the particular geometric shape indicative of that signal.

REFERENCES:
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patent: D159259 (1950-07-01), Ferguson
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patent: D211614 (1968-07-01), Warner
patent: D215373 (1969-09-01), Reimuller
patent: D267158 (1982-12-01), Lopez
patent: D287948 (1987-01-01), Evans
patent: 1616604 (1927-02-01), Brophy
patent: 2228835 (1941-01-01), Leppert
patent: 3688259 (1972-08-01), Rebillet
patent: 3863207 (1975-01-01), Galella

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