Gustav Klimt Hope paintingClaude Monet The Seine At Argenteuil paintingClaude Monet The Picnic painting
Harrison used his clocks as time standards for the marine chronometers he had pioneered to deliver accuracy great enough to allow the determination of longitude at sea.
There have been few significant advances in the mechanical clock since Harrison went against the grain of contemporary thinking by using large pendulum swings, enlarging the pendulum's "dominion" to reduce errors.
Among Harrison's many remarkable innovations was the gridiron mechanism, consisting of alternating brass and iron rods assembled so that expansion and contraction rates cancelled each other out as the chronometer moved from the tropics to colder climes.says.
Of Harrison's many innovations, he came up with the 'grasshopper escapement', explained Dr Taylor, referring to the device used by Harrison to turn rotational
He was also the inventor of the first caged roller bearing, the father of the ball bearing, in his last clock. Over 100 ball bearings are used in the Corpus clock.
Tuesday, 16 September 2008
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