Accuracy for Seventy Years 1860-1930 - download pdf or read online

By Pratt Whitney

ISBN-10: 1559180870

ISBN-13: 9781559180870

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

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The development of this machine is reported to have cost Mark Twain several fortunes. This machine proved far too expensive to build, but its design formed the basis of the Mergenthaler and other typesetting machines used today. The original model now is in the Sibley College of Engineering, Cornell University. In 1901 the Niles-Bement-Pond Company purchased the Pratt & Whitney Company and reorganized it. At that time, 43 Tobacco stripping machine. Rock drill. Hydraulic elevator piston machine.

One of several sizes of automatic milling machine made in large quantities. P&W 4 inch Spline Milling Machine. 50 up to six tenths of an inch, and with similar guarantees in proportion for larger sizes. This was the beginning of Pratt & Whitney Hoke Precision Gage Blocks. During the dull period from 1920 to 1925, Pratt & Whitney Company revised and re-designed its products — work which the feverish war activities had curtailed. It had been necessary to turn out machine tools in the quickest possible manner, and there was no time for new developments which were not absolutely essential.

First in London and later in Paris Professor Rogers obtained a reliable transfer of both the British Imperial Yard and the French Meter d’Archives. With the co-operation of the United States Coast Survey, the most delicate and exhaustive comparison of the standard bars prepared by him for the use of the Company were made with the United States Standards Yard designated as Bronze No. 11. 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.

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Accuracy for Seventy Years 1860-1930 by Pratt Whitney


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