winding lever
21Lock (water transport) — Canal lock and lock keeper s cottage on the Aylesbury Arm of the Grand Union Canal at Marsworth in Hertfordshire, England …
22Diesel locomotive — Three styles of diesel locomotive body: cab unit, hood unit and box cab. These locomotives are operated by Pacific National in Australia …
23History of the single-lens reflex camera — The history of the single lens reflex camera predates the invention of photography in 1826/27 by one and a half centuries with the use of a reflex mirror in a camera obscura first described in 1676. Such SLR devices were popular as drawing aids… …
24Violin construction and mechanics — A violin consists of a body or corpus, a neck, a bridge, a soundpost, four strings, and various fittings. The fittings are the tuning pegs, tailpiece and tailgut, endpin, possibly one or more fine tuners on the tailpiece, and perhaps a chinrest,… …
25Manchester Bolton & Bury Canal — The steam crane at Mount Sion, on the Bury arm Original owner Manchester Bolton Bury Canal Company Principal engineer …
26Ancient Egyptian technology — The characteristics of Ancient Egyptian technology are indicated by a set of artifacts and customs that lasted for thousands of years. The Egyptians invented and used many basic machines, such as the ramp and the lever, to aid construction… …
27Georges Frederic Roskopf — Infobox Person name = Georges Frederic Roskopf Georges F. Roskopf (1813 1889), the inventor of the pin pallet escapement, was born in Germany and became a naturalized Swiss citizen. Early life and introduction In 1829, when Roskopf was 16, he… …
28Torsion pendulum clock — A torsion pendulum clock, or torsion clock, is a mechanical clock which keeps time with a mechanism called a torsion pendulum. This is a weighted disk or wheel, often a decorative wheel with 3 or 4 chrome balls on ornate spokes, suspended by a… …
29Abraham-Louis Breguet — Born 10 January 1747(1747 01 10) Neuchâtel, Switzerland Died 17 September 1823 …
30List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …
