George Graham
George Graham
1673?-1751
British instrument maker and inventor famed for his astronomical instruments as well as his clocks and watches. Apprenticed to a London clockmaker in 1688, George Graham took over the business in 1713 then perfected the first successful deadbeat (or recoilless) escapement for clocks in 1715. For nearly 200 years it was standard equipment in observatories. In 1721, he invented the mercury compensation pendulum and the cylinder escapement for watches. Graham also developed a 5 feet (1.52 m) mural quadrant with telescopic sights in 1742 as well as other astronomical instruments.
More From encyclopedia.com
INSTRUMENT , in·stru·ment / ˈinstrəmənt/ • n. 1. a tool or implement, esp. one for delicate or scientific work: a surgical instrument writing instruments. ∎ a thi… Stringed Instrument , stringed instrument Musical instrument sounded by the vibration of strings. Instruments fall into different classes, according to the action used to… Antonio Stradivari , Antonio Stradivari
Italian violin maker Antonio Stradivari (c. 1644-1737) created instruments that are still considered the finest ever made. The new… Reed Instrument , reed instrument Musical instrument that produces sound when an air current vibrates a fibre or metal tongue. In a clarinet, a beating reed vibrates a… Instrumentation , Instrumentation refers to the use or application of instruments or specialized technologies for observation, measurement, control, or production. In… Gravimeter , gravimeter An instrument for measuring the gravitational acceleration. Most field instruments are relative instruments, i.e. they determine the diffe…
You Might Also Like
NEARBY TERMS
George Graham