John D Harper

Abstract

Developments in the iron foundry products and technology of John Harper & Co are reviewed, from its origins in the 1850s making white-heart malleable iron castings for locks and keys, grey iron castings for decorative hardware in the 1890s and for the electrical, typewriter and other industries in the 1920s and 30s, then Meehanite engineering castings in the 1940s and 50s and Spheroidal Graphite iron in the 1960s and ’70s. The company was eventually taken over in 1974 and the foundry closed in 1982. Changes in metallurgical production processes are reviewed in relation to changing economics, management policies, markets, and technologies. 

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References
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How to Cite
Harper, J. (2022). 130 years of changing cast iron technology: John Harper & Company 1852-1982. Historical Metallurgy, 35(1), 33-47. https://hmsjournal.org/index.php/home/article/view/282
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Articles

How to Cite

Harper, J. (2022). 130 years of changing cast iron technology: John Harper & Company 1852-1982. Historical Metallurgy, 35(1), 33-47. https://hmsjournal.org/index.php/home/article/view/282