pa1778data.pdf

U.S. STEEL DUQUESNE WORKS
HAER No. PA-115
(Page 138)
supported by fink trusses. The building has a corrugated metal
exterior.
Original Construction Date: 1921.
17*-3" Extension Construction Date: 1953.
2. Main Control Panel: Located in the northeast corner of
the building is a Westinghouse control panel. It contains
switches for the two skip incline motors and the two stock line
test motors.
Installation Date: 1921.
3. Skip Incline Motor, Drive and Winch Drum Assembly:
Mounted on the floor in the middle of the hoist house building
and laid out in parallel on a north-south axis are two 200 hp
Westinghouse Type S.K. D.C. motors operating at 450 rpm.
Connected to each motor on its southern end by a crankshaft is a
Lidgerwood gear drive. Both gear drives are connected to a
larger Lidgerwood gear drive by a crank shaft just south of them.
The large gear drive is connected to a 6'-0" diameter winch drum
which is wrapped with two 1 1/4" diameter wire hoist ropes
leading to the skip car and a 6'-0" diameter sheave wheel at the
top of the furnace, and one 1 1/4" diameter wire counterbalance
rope. Located on the western side of the motor, drive, and winch
drum assembly and attached to the crankshaft between the
Lidgerwood gear drives is a Koppers limit system composed of a
top and bottom travel limit switch for the skip car. Attached to
the center of the southern face of the winch drum is a Logan
Hoist Controller used for controlling the speed of the skip car
as it ascends and descends the hoist track.
Installation Date: 1921.
4. Stockline Test Motor and Winch Drum Assembly: Located on
an approximately 4'-0" wide x 20'-0" long x 10'-0" high balcony
that extends along the eastern wall of the hoist house building
are two stockline motor and winch drum assemblies. Laid out
linearly on a north-south axis, each interconnected assembly
consists of a 2 hp, 1200 rpm Reliance D.C. motor, a Jones-
Herringbone Speed Reducer, and a l'-o M diameter winch drum
wrapped with a 1/4" diameter steel cable. The cable from each of
the assemblies leads to the stockline test rods located at the
furnace top.
Installation Date: 1936.
5. Service Crane: The service crane is suspended from a
monorail located 15'-7 1/2" from the hoist house floor, and runs
along the centerline between the two skip incline motors. The
10-ton crane consists of a winch drum wrapped with a small steel
cable equipped with a "C" hook.
Installation Date: 1921.