OP-755 Part 2 Pages 197-401 - Personal Page of GENE SLOVER

351
TURRET TRAIN ORDER LOWER GEAR BRACKET
41. The turret train order lower gear bracket) shown
on drawing number 232404, functions to transmit turret train
order from the vertical shaft from the turret train order selector
clutch to a horizontal shaft to the turret train operator's
handwheel bracket. The coupling connecting this gear
bracket shaft to the handwheel bracket is this extent of the
sight design. This bracket is connected to the left gun girder
at the turret train operator's station and consists of a
phosphor bronze casting, ball bearing fitted to support the
. spiral bevel gears.
SIGHT HOOD ASSEMBLIES
42. The sight hood as semblies, drawings number 231173
to 231176, are all similar. The like parts of each hood are
identical except the sight hoods which vary as to pointer's,
trainer's, opposite hand, and as to provision of space for
larger right than left. deflection of the telescope. There is
also different arrangement of door operating mechanism in that
it is above the telescope at the pointer's station and below
the telescope at the trainer's. .The parts of the sight hood
are the sight hood, sight hood door, bloomer, bloomer coI Lar'
and frame, and door operating mechanism. The sight ;hood, a
special steel casting, is mounted on the turret armor over the
sight ports. Hinged to the' sight hood is a buLLetpr-cof steel
-doo r operated by a double screw and link door operating mechanism
which functions to open and close .the door, retain it
open, and clamp it shut. The sight hood bloomer is fastened
to the sight hood by a frame and to the telescope by a collar
and lashing. This bloomer provides a weather and gas seal for
the opening and is designed with a slit to permit wiping of
the objective lens.
SIGHT SETTER'S CLUTCH WARNING CIRCUIT
43. The sight setter's clutch warning circuit shown on
sketch no. 95204 consists of an arrangement of two switches
and two signal lights functioning to indicate to each sight
setter the position of the other sight setter's sight angle
synchronizing clutch. The switch is mounted on the clutch
case with a plunger in the way of and actua ted by the clutch
control lever. The switch is a normally open single throw
type switch and each switch is in circuit with a signal light
in the opposite sight setter's compartment so that the light
is on when the clutch is engaged.
TELESCOPE, MARK 66
44. The Telescope, Mark 66, shown
217427, is used at all sight stations.
prisma tic, fixed power, single eyepiece
on drawing number
It is of the fixed
type, containing a