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The shearing machines are worked on the principle of a horse clipper; there is a comb with slightly elevated teeth, made of steel, the knife works on the top of the comb; a three-horsepower engine will work 16 machines in the following manner:—There is a shaft running the whole length of the shearing floor, about 7 feet from the ground.
A mechanical bull, also known as a bucking machine, is a device that replicates the sensation of riding a bucking animal, such as a rodeo bull or horse, popularized by Sherwood Cryer. It is usually powered by a variable-speed electric motor.
Double bow shears are by far the most common as they are the most versatile. Single bow shears and inverse bowed shears offer more resistance and are mostly only used for tough shearing sheep. They come in varying lengths from about 10 cm (4 inches) to 18.5 cm (7.25 inches). [3] Most blade shears can be used straight from the factory.
The wool is removed by following an efficient set of movements, devised by Godfrey Bowen in about 1950 (the Bowen Technique [11]) or the Tally-Hi method developed in 1963 and promoted by the Australian Wool Corporation. Sheep struggle less using the Tally-Hi method, reducing strain on the shearer and there is a saving of about 30 seconds in ...
An alligator shear, historically known as a lever shear and sometimes as a crocodile shear, is a metal-cutting shear with a hinged jaw, powered by a flywheel or hydraulic cylinder. Alligator shears are generally set up as stand-alone shears; however, there are types for excavators. The jaw size can range from 4 to 36 in (100 to 910 mm) long.
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One of these is a sheet-metal shear, which was made by Parker Manufacturing Company, a machine shop in Santa Monica, CA. The company needed a shear, but backlogs in the World War II years meant a two-year waiting list to obtain one. So, the small company decided to design and make its own shear.
Thus the NBER definition above could be expanded to say "which employs a tool to work on metal or other materials of high hardness". And its specificity to "operating by other than hand power" is also problematic, as machine tools can be powered by people if appropriately set up, such as with a treadle (for a lathe) or a hand lever (for a shaper).
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