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The threads 11 on rod 4 have one pitch (e.g. 25 tpi, blue), while the threads 10 in the barrel 1 have another (e.g. 20 tpi, orange). A full turn of the thimble 12 rotates the nut sleeve 13 and its two threads ( 20 tpi outside and 25 tpi inside ) to move the rod 1 / 20 - 1 / 25 = 0.01 in (0.25 mm) relative to the barrel.
Walker Evans (November 3, 1903 – April 10, 1975) was an American photographer and photojournalist best known for his work for the Resettlement Administration and the Farm Security Administration (FSA) documenting the effects of the Great Depression.
Walker Evans photograph of three sharecroppers, Frank Tengle, Bud Fields, and Floyd Burroughs, Alabama, summer 1936. Let Us Now Praise Famous Men grew out of an assignment that Agee and Evans accepted in 1936 to produce a Fortune article on the conditions among sharecropper families in the American South during the Great Depression.
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Walker-Turner was founded by Ernest T. Walker and William Brewer Turner sometime around 1927 and 1929. The company was first located in Jersey City, New Jersey until 1931 when they relocated to Plainfield, New Jersey. The first machines Walker-Turner made were small, inexpensive, light-weight machines designed for home workshops of the time.
The reduction compass or proportional dividers is a geometry tool with asymmetric-length branches to allow performing homothetic transformations, reproducing a pattern while enlarging or reducing its size and conserving angles. It was invented by Fabrizio Mordente before 1567.
Power divider in microstrip technology. In the field of microwave engineering and circuit design, the Wilkinson Power Divider is a specific class of power divider circuit that can achieve isolation between the output ports while maintaining a matched condition on all ports.
The tool's design is based on a dental impactor, [6] a device that taps dental amalgam into cavities in teeth. [4] Activator I was patented by Activator Methods International on September 26, 1978. [4] [7] [8] Activator II was released, with an added "impedance head", in 1994. [4]
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