A valuable directory that illustrates and lists over 1000 fully-indexed patents, covering all American machinist s tools patented through 1905 and the more important ones patented between 1906 and 1916. Each patent is represented by at least one illustration, and each is indexed in three separate ways: alphabetically by patentee name, chronologically by date and patent number, and by type of tool. Required for anyone interested in American machinist s tools.

Originally published in 1915, with the third edition being published in 1922, this early works is a comprehensive and informative look at the subject. Contents Include; I. Tooth Parts, II. Spur Gear Calculations, III. Speed and Powers, IV. Gear Proportions and Details of Design, V. Bevel Gears, VI. Worm Gears, VII. Helical and Herringbone Gears, VIII. Spiral Gears, IX. Skew Bevel Gears, X. Intermittent Gears, XI. Elliptical Gears, XII. Epiclycic Gear Trains, XIII, Friction Gears, XIV. Special Bevel Gears, XV. Williams System of Internal Gearing, and, XVI, Rolled Gearing. Many of the earliest books, particularly those dating back to the 1900's and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.

A century and a half before the modern information technology revolution, machinists in the eastern United States created the nation's first high technology industries. In iron foundries and steam-engine works, locomotive works, machine and tool shops, textile-machinery firms, and firearms manufacturers, these resourceful workers pioneered the practice of dispersing technological expertise through communities of practice. In the first book to study this phenomenon since the 1916 classic, English and American Tool Builders, David R. Meyer examines the development of skilled-labor exchange systems, showing how individual metalworking sectors grew and moved outward. He argues that the networked behavior of machinists within and across industries helps explain the rapid transformation of metalworking industries during the antebellum period, building a foundation for the sophisticated, mass production/consumer industries that figured so prominently in the later U.S. economy.