This compressor was a product of the combined technology and design heritage of both the C. & G. Cooper Company of Mount Vernon and the Bessemer Gas Engine Company of Pennsylvania, which had merged in 1929. Ralph L. Boyer, the chief architect of the GMV, worked for Cooper-Bessemer from 1926 through 1965.
Minerals Extraction & Refining
YearAdded:
Image Credit:
courtesy www.osagcd.com
Image Caption:
Cooper-Bessemer Type GMV Integral-Angle Gas E
Era_date_from:
1944
2006
When built in 1962, this shovel was the second largest in the world. It was used for the removal of overburden in the surface mining of thin coal seams. In its lifetime, it recovered nine million tons of bituminous coal from depths of 20 to 50 feet for local electric power generation. Standing 160-feet high, weighing 5,500 tons, and moving at speeds up to two-tenths of a mile per hour, the machine stripped about a square mile each year.
YearAdded:
Image Credit:
Courtesy Flickr/KellyK (CC BY-SA 2.0)
Image Caption:
This picture of the Big Brutus Mine Shovel does not fully capture its immensity. To create a comparison, the average person would be slightly shorter than the treads, near the bottom.
Era_date_from:
1962
1987
This is one of the three original 60-ton vessels by which the basic oxygen process (BOP) of steel making was introduced into this country from Austria, where it was invented. It heralded the first new technology in fifty years to become the basis of a major process for steel production throughout the world. In this process, a water-cooled lance injected a jet of high-purity oxygen into the bath of molten iron. Various chemical reactions produced a quality low-nitrogen steel at a ton-per-hour rate nearly three times that of the open hearth furnace.
YearAdded:
Image Credit:
Courtesy ASME
Image Caption:
Basic-Oxygen Steel Making Vessel
Era_date_from:
1955
1985
The Saugus Ironworks, the first commercial ironworks in North America, was an impressive technological achievement for an early colony. The same basic processes are used today: reducing iron oxide with carbon to produce metallic iron that can be cast in a mold, producing wrought iron by puddling cast iron, and fabricating wrought iron with power hammer and rolls.
YearAdded:
Image Credit:
Courtesy Flickr/Kristin Shoemaker (CC BY-ND 2.0)
Image Caption:
One of the Saugus Ironworks' water wheels in motion
Era_date_from:
1647
1975
This floating dredge is one of the last mammoth gold dredges in the Fairbanks Mining District that traveled an ancient stream bed, thawing the ground ahead of it and scooping up the gravel. During 32 years of operation, a fortune in gold washed through its sluices. Ladder dredges came to Alaska in the early 1920s, after the U.S. Smelting, Refining, and Mining Company (USSR&M) brought water to the area via the 90-mile Davidson Ditch. Using the water to warm the ground, the ground was thawed at an average 9 inches a day.
YearAdded:
Image Credit:
Courtesy Flickr/Roger Wollstadt (CC BY-SA 2.0)
Image Caption:
Fairbanks Exploration Company Gold Dredge No.
Era_date_from:
1928
1986
