Specification
Clearmain 8128
USE
Main road lighting, 25 ft mounting height, spacing 120-150 ft, road width up to 40 ft.
LAMPS
Z8128B. 125W MB/U or MBF/U, 250W or 400W Osram mercury-type MA/V lamp or
250W or 400W MBF/U lamp.
MOUNTING
Side entry. Requires 2.3/4 in. of horizontal, unthreaded 1.1/4 in. B.S.P. When fully home,
two 7/16 Allen-type grub screws grip the barrel.
LANTERN BODY
Totally enclosed die-cast light alloy with spun light alloy spring fit detachable top. A water
baffle and drainage hole to carry off any water running along the bracket and an
earthing screw are provided.
LAMPHOLDER
Porcelain G.E.S. mounted on a bridge piece and wired to a porcelain connector with
heat-resisting insulted wire.
|
FOCUSING
A bridge piece carried on two vertical rods, one marked with grooves giving correct
focal positions for different lamp wattages.
OPTICAL SYSTEM
The refractor is made in one piece of heat resisting glass and is a Z6612/170 degrees
non-axial asymmetric bowl refractor. This has vertical curved prisms and deep flutes on the
interior surface to provide light control. The exterior of the bowl is smooth expect for some
prisms on the base. A white vitreous enamelled inner reflector is provided with 3 in. diameter
hole for the lamp. A hinged stainless steel spring ring and toggle catch holds the prismatic
bowl pressed against a felt ring in the main body casting.
WEATHERING FINISH
The alloy used is especially selected for its resistance to corrosion. Further protection
is obtained by the use of a suitable primer, undercoat and matt aluminium-finish top coat.
Export packing details on application.
|
