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

236
Motor Data
Type - - - - - 60 cycle, 440 volt, 3 phase,
squirrel cage induction.
Horsepower - - - - - - - - - - - - - - - - - - - 60
Speed- - - - - - - - - - - Constant
R.P.M. (full load) - - - - - - - - - - - - - - 1750
Amperes, full load - -- - - - - - - - 81
Rotation, center & left motors, fan end - clockwise
Rotation, right motor, fan end - - counterclockwise
Lubrication- - - - - - - - - - - - - - -grease cups
Manufacturer's type designation- - - AA-B-504-Y
General arrangement drawing- - - - - - - - - 231723
14. Electric controller. - Each of the above described
motors is provided with starting circuit push-button control
mounted in the gun compartment (cradle operator's station) and
connected to a controller circui t. This circui t includes IIStopll
push-buttons at the two hoist control stations (par. 34). The
controller is located on the circular bulkhead within the
machinery space of the lower proj ectile flat. It is a cabinet
enclosed unit of commercial manufacture (Ward Leonard Co.)
equipped with door interlocked safety switch. The design is
an across-the-line magnetic starter arranged with overload,
undervol tage and short circuit protec tion for the motor as
shown on drawing number 231722.
15. Solenoid brake. - The motor output is coupled to
the reduction gear unit (par. 16) through the drum shaft of a
solenoid brake. This is a power-failure brake which operates
mechani caLl.y to set and thus prevent overhaul in instances
of mid-stroke power-failure. It is actuated to release the
brake through solenoid plunger stroke and brake band linkage
when the motor supply circuit is closed; the solenoid is a
440 volt, 60 cycle, single phase, continuous duty type, 125
foot pound torque, eight inch brake wheel. The assembled unit
(dr. no. 231727) with separate mounting base is of commercial
design and manufacture (Clark Controller Co.) and is similar
to standard commercial elevator brakes. Shaft coupling between
motor and brake shaft (reduction gear input) is through a gear
type flexible coupling (#2 Waldron, dr; no. 231758).
16. Retiuc t ion gear. - The reduction gear is a separately
mounted, case enclosed uni t of commercial design and manufacture
(Michigan Tool Co.). See drawing number 275600. It
is a worm and worm-wheel drive, oil bath lubricated, providing
400 r.p.m. output speed (at normal motor speed). The output
is coupled to the A-end shaft through a gear type flexible
coupling (#2-1/2 Waldron, dr. no. 231762).
17. Hydrau l i c pump. - The A-end is a standard commercial
speed gear, type K, size 35 (Waterbury Tool Co.) modified