LENSES


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