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Vermeer invents the first machine to dig, transport and replace large trees in the 1960s. The first larger round hay baler was invented by Gary Vermeer in 1971. Allis Chalmers first introduced the small round rotobaler in 1947. Vermeer begins building large trenchers to lay underground pipelines in the 1980s.
Note the 40-ton CAT wheeled dozer at lower left for size comparison. A bucket-wheel excavator (BWE) is a large heavy equipment machine used in surface mining. Their primary function is that of a continuous digging machine in large-scale open-pit mining operations, removing thousands of tons of overburden a day.
A chain trencher cuts with a digging chain or belt that is driven around a rounded metal frame, or boom. It resembles a giant chainsaw. This type of trencher can cut ground that is too hard to cut with a bucket-type excavator, and can also cut narrow and deep trenches. The angle of the boom can be adjusted to control the depth of the cut.
The more common classical type is a solid chain track made of steel plates ... and in 1908 brought out the 40-horsepower (30 kW) "Holt Model 40 Caterpillar". Holt ...
A 6-inch wide trench with a digging depth of 30 inches was the goal. [4] The first production trencher rolled off the assembly line in 1949. Called the "endless conveyor ditch digging machine," It was the first mechanized, compact service-line trencher developed for laying underground water lines between the street main and the house.
Roller chain and sprocket The sketch of roller chain, Leonardo da Vinci, Codex Atlanticus. Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles.
Size Location Christ in the House of Martha and Mary [6] 1654–55 or c. 1654–56 [7] or c. 1655 [8] Oil on canvas, 160 × 142 cm National Gallery of Scotland, Edinburgh: Saint Praxedis [9] 1655 [3] Oil on canvas, 101.6 x 82.6 cm Kufu Company Inc., Tokyo On loan to the National Museum of Western Art, Tokyo Diana and Her Companions [10] 1655–56
Girl with a Pearl Earring (Dutch: Meisje met de parel) [1] [2] is an oil painting by Dutch Golden Age painter Johannes Vermeer, dated c. 1665. Going by various names over the centuries, it became known by its present title towards the end of the 20th century because of the earring worn by the girl portrayed there. [3]