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Download e-book for kindle: Accuracy for Seventy Years 1860-1930 by Pratt Whitney

Posted On March 14, 2018 at 9:04 am by / Comments Off on Download e-book for kindle: Accuracy for Seventy Years 1860-1930 by Pratt Whitney

By Pratt Whitney

ISBN-10: 1559180870

ISBN-13: 9781559180870

Entrance hide has curling. Binding is tights pages are fresh.

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Years of time and many thousands of dollars went into this work. The net result was that Pratt & Whitney Company succeeded eventually in making several accurate copies of the British Standard Yard, the French Meter d’Archives and the American standard of length known as Bronze No. 11. These famous bars are still among our prized possessions. They were the basis of Pratt & 35 Four of the master bars accurate within millionths of an inch, made about 1880. Early thread gages made in 1876. Cylindrical gages of 1876.

Pratt & Whitney employees singing the “Star Spangled Banner” during a Liberty Loan rally in April, 1918. 64 1860 1930 A typical group of gages for rifle work. Pratt & Whitney have designed and made gages for every part of the rifles used by the armies of many of the world powers. A stack of Lee-Enfield Rifles. See page 45 Star gage equipment for testing gun barrels. A typical star gage head. 65 1860 1930 The Gardner Gun mounted on a gun carriage with a caisson. An early and unsuc cessful attempt at a 16 shot pistol.

Commander Clarkson was sent to the United States to investigate, and the contract was awarded to Pratt & Whitney Company, as he found their equipment far in advance of anything he had seen previously. The machinery was tested before shipment from the United States and the time per gun actually was lessened. Experts from Hartford were sent to Australia to set up the plant and train the operators. In 1912 the plant was in full operation, and one of the Hartford men was retained as manager of it. It was not always war and guns that brought business to Pratt & Whitney.

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Accuracy for Seventy Years 1860-1930 by Pratt Whitney


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