French Elizabethan Mantel Clock
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- Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.
- Elizabethan - Strictly speaking, furniture usually in oak, made in the reign of Elizabetht I, from 1558 to 1603. The style incororates elaborate and ostentatious carving of classicial figures and themes and bulbous baluster legs, with an Italian Renaissance influence. When a piece is described as "Elizabethan style", it mimics the attributes of the Elizabethan period, but was made at a later date.
- Pendulum - The pendulum was discovered around 1602 by Galileo Galilei, and was adopted for time keeping by the Dutch mathematician and natural philosopher, Christiaan Huygens, who excelled in astronomy, physics, and horology.
The pendulum comprises a metal rod usually of brass or steel with a metal disk, known as a bob, at the end. The movement of the pendulum is driven by weights or a spring, and as a pendulum swings in a regular arc, it was found accuracy could be controlled to within a few seconds a week.
Timekeeping can be adjusted by changing the height of the bob on the rod, making the pendulum either swing slower or faster.
The disadvantage of the pendulum was that changes in temperature also changed the length of the pendulum, interfering with the accuracy of the clock, and so in the 18th century two types of mercurial pendulums were invented which countered the movement in the steel rod.
The pendulum was the world's most accurate timekeeping technology until the invention of the quartz clock, regulated by a quartz crystal, in 1927.
This item has been included into following indexes:
- clocks, mantle & shelf, material or style - gilt metal / ormolu 547
- clocks, mantle & shelf, period or origin
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