Change gear devices
Subtitle: describing and illustrating the development of the screw-cutting lathe and the United States patents upon the methods for obtaining various pitches of screw threads. Prefaced by a brief history of the engine lathe.
By: By Oscar E. Perrigo ...
Edition: 2d ed. Fully illustrated with engravings made from the records of the United States Patent office.
Publisher: The N.W. Henley Publishing Co.
Published: 1909
Place of publication: New York
Language: eng
Number of pages: 101
Subjects: Lathes.