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Caterpillar soil compactor equipped with padfoot drum, being used to compact the ground before placing concrete Antique "Kemna" steamroller. A road roller (sometimes called a roller-compactor, or just roller [1]) is a compactor-type engineering vehicle used to compact soil, gravel, concrete, or asphalt in the construction of roads and foundations. [1]
A drawworks is the primary hoisting machinery component of a rotary drilling rig.Its main function is to provide a means of raising and lowering the traveling block.The wire-rope drill line winds on the drawworks drum and over the crown block to the traveling block, allowing the drill string to be moved up and down as the drum turns.
Drum Motor with Planetary Gear Drum Motor With Helical Spur Gear. The drum motor concept was first recorded in 1928, but it was not used until the early 1950s, when it was first produced specifically for conveyor belt applications. The goal was to produce a compact, totally enclosed single component drive unit with high efficiency and lower ...
One disc is the input, and the other is the output. Between the discs are rollers, which vary the ratio and transfer power from one side to the other. When the rollers' axes are perpendicular to the axis of the discs, the effective diameter is the same for the input discs and the output discs, resulting in a 1:1 drive ratio. For other ratios ...
The roller is an agricultural tool used for flattening land or breaking up large clumps of soil, especially after ploughing or disc harrowing. Typically, rollers are pulled by tractors or, prior to mechanisation, a team of animals such as horses or oxen. As well as for agricultural purposes, rollers are used on cricket pitches and residential ...
It may directly push [12] the bolt group parts, as in the M1 carbine, or operate through a connecting rod or assembly, as in the Armalite AR-18 or the SKS. In either case, the energy is imparted in a short, abrupt push and the motion of the gas piston is then arrested, allowing the bolt carrier assembly to continue through the operating cycle ...
He grew up on the farm with his brother, Matthew (born in 1838), [3] who remained a farmer for much of his life. George, however, left home at the age of 18 to apprentice as a machinist with Haggert Brothers in Brampton, a firm specializing in the manufacture of threshers. At the time, agricultural machinery in Ontario was only beginning to be ...
Magnetophon from a German radio station in World War II.. The reel-to-reel format was used in the first magnetic recording systems, wire recording and then in the earliest tape recorders, including the pioneering German-British Blattnerphone (1928) machines which used steel tape, [3] and the German Magnetophon machines of the 1930s.