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A brace and bit can be used to drill wider and deeper holes than can a geared hand-powered drill. The cost of the greater torque is lower rotational speed; it is easy for a geared hand drill to achieve a rotational speed of several hundred revolutions per minute , while it would require considerable effort to achieve even 100 rpm with a brace.
Following this exercise, Steuben published his drill instructions in a manual that was published in 1779 and widely distributed throughout the Continental Army. This manual became commonly known as the army's "Blue Book". It remained the official U.S. military guide until 1812. [1]
A manual of arms was an instruction book for handling and using weapons in formation, whether in the field or on parade.Such manuals were especially important in the matchlock and flintlock eras, when loading and firing was a complex and lengthy process typically carried out in close order.
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The strap drill is a simpler version, where the bow is absent and the cord is kept taut by pulling the ends with both hands, while moving them left and right at the same time. In the absence of a frame, the thimble is shaped so that it can be held with the chin or the mouth.
After looking at a range of tools from prehistory to the Romans, the book examines in detail more recent hand tools by function: from saws to drills and braces; from rules and gauges to bevels, squares and levels. Much of the book, however, is devoted to an extensive selection of wooden and metal planes and highlights their manifold functions ...
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Eventually the success of the Yankee line of tools led the Stanley Works tool company to acquire the North Bros. in 1946, chiefly to improve their own product lines. Stanley was primarily interested in their bit and brace designs, which continued to be produced unchanged at Stanley for decades, and the spiral ratchet "Yankee" screwdrivers. The ...