Sidney Adolph Horstmann, MBE (7 July 1881 – 11 July 1962) was a British engineer and businessman.Early life
Sidney was the youngest son of the German clockmaker Gustav Horstmann, who moved to England about 1850. Gustav designed the world's first micrometer with an accuracy greater than 1/10000 of an inch. Sidney was born in Bath.Horstmann Gear
In 1904, Horstmann and his brothers founded Horstmann Gear to produce a variable speed gearbox he had invented for cars and motorcycles. The firm later became a general engineering company and came to specialise in gas street lighting controls, time switches, gauges, and latterly central heating controls. They also worked with William Friese-Greene in the development of the first cameras for moving celluloid film.In 1915 a large factory, Newbridge Works, was opened in a former dance hall at Newbridge, Bath, and subsequently Newbridge was used as a trade mark.In 1994 the Horstma
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