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Edgar Thomson Steel Works in the mid-1990s. The Edgar Thomson Steel Works is a steel mill in the Pittsburgh area communities of Braddock and North Braddock, Pennsylvania. It has been active since 1875. It is currently owned by U.S. Steel and is known as Mon Valley Works – Edgar Thomson Plant.
The overlay method – patented by Harvey Mann in 1862 (no. 35,480) – welded steel on the outside of the scarf, which exposed more steel on the cutting edge. Around 1900, all-steel heads came into use. An online video from 1964 captures the effort required to make axes, including steeling the head and hanging ("hafting") a handle or haft. [2]
Mesta Machinery was a leading industrial machinery manufacturer based in the Pittsburgh area town of West Homestead, Pennsylvania. It was founded in 1898 by George Mesta when he merged his machine shop with another. [2] Mesta "machines" can be found in factories throughout the world and as of 1984 had equipment in 500 steel mills. [3]
The Jones and Laughlin Steel Corporation, also known as J&L Steel or simply as J&L, was an American steel and iron manufacturer that operated from 1852 until 1968. The enterprise began as the American Iron Company, founded in 1852 by Bernard Lauth and Benjamin Franklin Jones , about 2.5 mi (4.0 km) south of Pittsburgh along the Monongahela ...
Wheeling Steel Corporation was organized on June 21, 1920. [1] It consisted largely of the assets of the Whitaker iron family and associated families in the Ohio valley and remained under their control for many years. In 1968, Wheeling Steel merged with Pittsburgh Steel to become the 9th-largest steelmaker in the United States at the time.
The industries in the company's initial customer base were not only various types of coal plants, but also cement, chemical, steel, glass, blast furnaces, copper mines, ports, foundries, railroads, shipyards and public utilities. Heyl & Patterson's original place of business was a three-story building on Third Avenue in Pittsburgh.
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