Article ID: CBB866186796

Evolution of the Hopewell Furnace Blast Machinery (2016)

unapi

A new analysis of existing furnace and archeological records over the entire smelting lifetime (from c. 1771 to 1883) yielded an improved estimate of the design of the blast machinery at Hopewell Furnace, a cold-blast charcoal iron furnace near Elverson, Pennsylvania. Of particular interest is an analysis of how the work of “bellows dressing” varies over time, which helps delineate significant changes in the blast machinery design. The current equipment, maintained as part of Hopewell Furnace National Historic Site, is a double-acting double-cylinder wood unit powered by a 22-ft. breast-type waterwheel. This is likely to have been converted in about 1838 from a single-acting double-cylinder wood unit powered by a similar wheel. This in turn may have been preceded by a ground-mounted unit that was removed before 1800. There is insufficient evidence to tell whether the original blast machinery was a wood cylinder or leather accordion type. Improved knowledge of the blast machinery design is important both for improved public interpretation and to better understand variations in furnace production.

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Authors & Contributors
Gary F. Coppock
Jadviga M. da Costa Nunes
Ruminski, Clayton J.
Paul White
Frances C. Robb
Scott D. Heberling
Concepts
Industrial archaeology
Blast furnaces
Iron and iron industry
Charcoal and charcoal industry
Iron Mines and Mining
Iron, Cast
Time Periods
19th century
20th century
18th century
Places
United States
Pennsylvania (U.S.)
New Bedford, Mass
Oswego, OR
Carp River
Juniata County
Institutions
West Point Foundry
Adirondack Iron and Steel Company
U.S. Dept. of the Interior, National Park Service, Historic American Buildings Survey/Historic American Engineering Record
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