Part 3

Machines embodying the principle of the master lead screw are found in constant use by industry at the present time for specialized application. Whenever technological changes again reopen the topic of thread-cutting to a new degree of accuracy or call for a reevaluation of popular methods for any other reason, we may expect to see another resurgence of the master-screw method, for no other design eliminates so many variables or rests on such firm and fundamental natural principles as the machine of Das mittelalterliche Hausbuch of 1483, the earliest such machine now known.

FOOTNOTES:

JACQUES BESSON, Des instruments mathématiques, et méchaniques, servants à l'intelligence de plusiers choses difficiles, & necessaires à toutes républiques, 1st ed. (Orleans, 1569). [Also available in later editions in French, German, and Spanish.]

J. FOSTER PETREE, introduction, Henry Maudslay, 1771-1831, and Maudslay Sons and Field, Ltd. (London: The Maudslay Society, 1949).

American Machinist (September 28, 1916), vol. 45, no. 13, pp. 529-531.

U.S. patent 10383 issued to Joseph Nason of New York, January 3, 1854.

U.S. patent 293930 issued to Charles Vander Woerd of Waltham, Massachusetts, February 19, 1884.

U.S. patent 1874592, filed June 8, 1929, issued to C. G. Olson of Chicago, Illinois, August 30, 1932, and assigned to the Illinois Tool Works, also of Chicago.

U.S. patent 1901926, filed February 16, 1928, issued to C. G. Olson of Chicago, Illinois, March 21, 1933, and assigned to the Illinois Tool Works, also of Chicago.

U.S. patent 1899654, filed August 31, 1931, issued to F. A. Ward of Detroit, Michigan, February 28, 1933, and assigned to the Gear Grinding Company of Detroit, Michigan.

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U.S. GOVERNMENT PRINTING OFFICE: 1964

For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402--Price 20 cents

INDEX

Besson, Jacques, 107

Douglas, W. & B., Company, 113

Maudslay, Henry, 106, 113

Nason, Joseph, 114

North, Simeon, arms factory, 114

Olson, Carl G., 118

Vander Woerd, Charles, 116, 117

Ward, Frederick A., 120

Wetschgi, Emanuel, 108

Wetschgi, Manuel, 108, 111

Whitney arms factory, 114

Wilkinson, David, 113