This is the first in a trilogy of books profiling in detail David Brown and its products. David Brown was a Yorkshire company, based around Huddersfield. Its roots lay in wooden-pattern making for the looms and weaving machinery of the area in the 1850s. This led to the manufacture of the machine-cut iron gears in which the company excelled. In 1914 the company patented a worm thread for gears that eventually was adopted as the British Standard thread...