a. Head Assembly. The head assembly is comprised of the head, to which is fastened the front window
assembly, rear cover and the rack assembly.
The front window assembly contains a tempered clear glass sealed into a machined aluminum frame with
a rubber gasket. The window assembly is joined to the housing with a floating hinge along the lower edge
of the housing. When closed, the window assembly and a gasket is held tight against the front flange face
of the housing by three over-center clamps. A moisture proof and air tight seal is effected by the clamps.
The rear cover is attached to the housing in the same manner as the front window assembly. A gasket
seal also is provided in the rear cover.
The electrical cable passes through a water tight feed-thru in the searchlight housing wall.
The gasket in the front window assembly and the rear cover, together with the watertight feed-thru for the
electrical cable, provide an effective moisture proof, air tight seal so that the entire housing, when closed,
is protected against the intrusion of water and air.
The support assembly is fastened to the housing with four radial bolts extending inward through the hous-
ing wall and engaging threaded holes in the mounting plate. The support assembly contains the reflector,
blower motor, the lamp and the necessary high voltage electrical components to initiate lamp ignition.
The gear rack assembly attaches to two angle brackets which in turn are fastened to two mounting boss-
es attached to the bottom of the searchlight housing. This mounting arrangement provides for sufficient
positive adjustment of the gear rack so that it can be properly aligned and meshed with the mounting spur
gear which gives the head vertical movement.
b. Yoke and Base Assembly.The yoke and base assembly is comprised of two yoke arms bolted to a
yoke support plate and a base plate having a central spindle. The yoke support plate rotates on two
tapered roller bearings mounted on the base plate spindle. These bearings require lubrication. A different
bearing housing
is centrally positioned on top of the rotating cover and fastened by two machine bolts. The mechanical
directional controls fit into this housing such that the outer tube (azimuth directional control) is clamped to
this housing by a special clamp.
The inner rod (elevation directional control) extends through this housing such that the end of the rod
extends approximately one inch above the center of the gear rack on the bottom of the searchlight hous-
ing. An oil seal located in the bearing housing surrounds the inner rod as it passes through the bearing
housing to prevent water from leaking into the pilot house. A pinion gear fastened to the end of the inner
rod meshes with the gear rack to provide vertical motion of the searchlight head (See Mechanical
Directional Controls).
c. Power Supply.
WARNING
The following equipment contains voltages and current which are hazardous to
human life. Extreme caution must be exercised when performing tests required while power is on.
The XR Series Power Supply, PERKO # 9511-000-110 operates on 120 VAC, 60 Hz. (Standard)
The XR Series Power Supply, PERKO # 9511-000-220 operates on 220VAC, Single Phase 60 Hz.
(Optional)
The Power Supply will accommodate input voltage variations from approximately 115 to 130 VAC or 215
to 250 VAC respectively from the ship’s power generators.
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