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• U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 139) 6. Large and Small Bell Hydraulic Cylinders: The Koppers hydraulic cylinders for the large and small bell are laid out linearly on a east-west axis in the center of the 1953 extension at the southern end of the hoist house building. The approximately 19 ! -0" high large bell hydraulic cylinder has a 50" diameter. The i6'-6" high small bell hydraulic cylinder has a 38" diameter. The top of each cylinder is attached to a steel cable which runs from the hoist house to the large or small bell at the furnace top. The introduction or retraction of compressed air into or from the cylinders forces them to move up or down, thereby opening or closing the bells at the top of the furnace. Installation Date: 1953. 7. Air Receiver and Associated Piping: Located approximately 5 ! -0" south of the large and small bell hydraulic cylinders is an approximately 4'-0" diameter x 9'-8" high air receiver manufactured by the Quaker City Iron Works of Philadelphia, PA in 1953. The receiver, which stores compressed air, has a system of small compressed air pipes connecting it to the hydraulic cylinders. Installation Date: 1953. 8. Counterweight Hoist Tower: The counterweight hoist tower is located approximately 3'-0" east of the air receiver in the center of the 1953 hoist house extension. See item number III - A - 11 for description. C. Furnace Top: 1. Large Bell Hopper: See I - C - 1 for description. Installation Date: 1968. 2. Large Bell: The large bell is 14'-0" in diameter x 9*-5" high and is located about the centerline of the blast furnace. It is attached by a 8" diameter rod to a lever arm which is connected to and operated by the steel cable leading from the 50" diameter hydraulic cylinder located in the hoist house. Construction Date: 1953. 3. Small Bell Hopper: The small bell hopper sits above the small bell at the top of the furnace. It is S'-l" high with a top inside diameter of 6'-0", tapering downwards to a bottom inside diameter of 5'-3". The flange surrounding the top of the hopper is 11" wide. Installation Date: 1953. 4. Small Bell: The 6'-0» diameter x 3'-l 1/2" high small bell is located directly above the large bell. It is attached by a 4" diameter rod to a lever arm which is connected to and
U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 14 0) operated by the steel cable leading from the 38" diameter hydraulic cylinder located in the hoist house. Construction Date: 1953: 5. Revolving Distributor: The revolving distributor, designed and manufactured by Arthur G. McKee & Co. of Cleveland, Ohio, sits above the small bell. It consists of 12'-6 9/16" high hopper with a top inside diameter of 7'-5 3/8" and a bottom inside diameter of 5'-5" which houses the distributor. The distributor is a small motor powered bell shaped seat which fits directly on top of the small bell. Raw materials enter the revolving distributor's hopper from the receiving hopper located directly above it. Installation Date: 1953. 6. Receiving Hopper: The irregularly shaped receiving hopper, designed and manufactured by the Arthur G. McKee & Co. of Cleveland, Ohio, sits above the revolving distributor's hopper. It receives raw material from the skip car. The opening at its top is 5'-5" wide x 5'-11" long. Its 5'-11" diameter bottom opening fits inside of the top opening of the hopper for the revolving distributor. Installation Date: 1953. IV. Blast Furnace Number Four: A. Stockhouse: 1. Stockhouse Building: See description I - A - 1. 2. Orer Manganese, and Flux Scale Car: The scale car for blast furnace number 4 adheres to the same construction and arrangement described for the scale car at blast furnaces number 1 and 2. Installation Date: 1921 3. Orer Manganese, and Flux Bins: See description I-A-3. Installation Date: 1921. 4. Coke Bin: The coke bin meets the specifications described in III - A - 4 with the exception that one 48" x 72" electromagnetic vibrating feeder, manufactured by the Eriez Magnetics Company of Erie, PA, is attached to each of the bin's bottom openings. The feeder drops its coke charge onto a Syntron vibrating coke screen located directly below it. Construction Date: 1921. Installation of Eriez vibrating feeder: 1968. 5. Skip Pit: The 17'-3" wide x 26'-4 1/2" long x 17'-1 1/2"
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construction carbon and alloy steel
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