pa1778data.pdf
pa1778data.pdf
pa1778data.pdf
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U.S. STEEL DUQUESNE WORKS<br />
HAER No. PA-115<br />
(Page 115)<br />
conveyor belt number one through a 7*-0" square concrete tunnel<br />
for a distance of 59'-0" at an angle of 12 degrees. The belt is<br />
48" wide, 15/32" thick and 283'-9 3/8" long. It runs at a speed<br />
of 550 feet per minute and has a capacity of 3500 tons per hour<br />
at 13 5 pounds per cubic feet of ore. Located at the northern end<br />
of the conveyor belt is its motor, gear reducer, and drive shaft<br />
assembly. The motor is a 30 hp Westinghouse A.C. motor which<br />
runs at 1500 rpm. The Jones-Herringbone gear reducer has a ratio<br />
of 23.6 to 1.<br />
3. Conveyor Belt Number Three: Extending from the northern<br />
end of conveyor belt number two, conveyor belt number three rests<br />
on a steel frame approximately 3 f -0" above the trestle. The belt<br />
is 48" wide, 5/16" thick, and 1261'-4 3/4" long. It was<br />
manufactured by the U.S. Rubber Company and runs at a speed of<br />
550 feet per minute with a capacity of 3500 tons per hour at 135<br />
pounds per cubic feet of ore. Located at the northern end of the<br />
conveyor belt, along the western wall of the stockhouse is its<br />
motor, gear reducer, and drive shaft assembly. The motor is a<br />
500 hp Westinghouse A.C. motor which runs at 1200 rpm. The<br />
Philadelphia gear reducer has a ratio of 30 to 1.<br />
4. Conveyor Belt Number Four: Conveyor belt number four<br />
rests on a steel frame approximately 3'-0" above the trestle and<br />
extends from the northern end of conveyor belt number three. The<br />
belt was manufactured by the U.S. Rubber Company. It is 48"<br />
wide, 5/16" thick, and 1135'-11 3/8" long. It runs at a speed of<br />
550 feet per minute and has a capacity of 3500 tons per hour at<br />
13 5 pounds per cubic feet of ore. The belt ends at a drive house<br />
which is located at the northern end of the ore yard. Inside of<br />
the drive house is the belt's motor, gear reducer and drive shaft<br />
assembly. The motor is a 3 00 hp Westinghouse A.C. motor which<br />
runs at 1200 rpm. The Jones-Herringbone gear reducer has a ratio<br />
of 24.1 to 1.<br />
5. Drive House for Conveyor Belt Number Four: The drive<br />
house, built by the American Bridge Company, is a 14*-0" wide x<br />
27»-e" long x 24*-0" high steel framed building with a stainless<br />
steel sheeting exterior. Its stainless steel exterior gable roof<br />
is supported by King Post trusswork. Welded to the trusswork<br />
along its centerline and extending the entire length of the<br />
building is a geared monorail for a 5-ton chain hoist.<br />
Construction Date: 1957.<br />
F. Tripper Number One: Manufactured by the Link Belt Company,<br />
tripper number one diverts ore traveling on conveyor belt number<br />
three into either the ore yard or into ore bins hung from the<br />
trestle above the stockhouse by means of a feeder conveyor and<br />
chutes. Each feeder conveyor is powered by one of two 3 0 hp