LENSES
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The Lenses used in Crouse-Hinds signals were made by either Corning Glass or KOPP Glass. They conformed in transmission and chromaticity to the specifications of the Institute of Traffic Engineers. |
| LETTERED PRISMATIC DIFFUSING LENSES Made by Corning Glass The lettered prismatic diffusing lens was used as a standard lens in all Crouse-Hinds signals from 1922 to 1927. The lettering was molded in the glass and the letters were painted black. Due to the wide use of traffic signals, the words "STOP", "CAUTION" AND "GO" became unnecessary. These lenses were available well into the 1950's, and were substituted for the standard lens when requested. |
| PRISMATIC DIFFUSING LENS Made by Corning Glass The prismatic diffusing lens was used as a standard in all Crouse-Hinds signals from 1922 to 1927. This lens has a shorter range than the type B or T lens, but gives a somewhat wider angle of light distibution. |
| TYPE T COMBINATION LENS Made by Corning Glass The type T combination lens came out around 1940 and was designed to meet the candlepower distribution requirements of the new specifications of the Institute of Traffic Engineers. This lens when used with the Crouse-Hinds parabolic glass reflector exceeded the candlepower requirements of the specifications. It provides a powerful, long-range signal indication and it also distributes light downward and to the sides, for pedestrians and nearby vehicle drivers, regardless of the angle from which it is seen. |
| TYPE B COMBINATION LENS Made by Corning Glass The type B combination lens was furnished as standard in all Crouse-Hinds signals from 1927 to 1940. At some points it fell short of the ITE candlepower requirements. The type B lens was available as a substitute lens. |
PEDESTRIAN LENSES Made by KOPP Glass ARROW LENSES Made By KOPP Glass |