Swedish Rococo Cartel Clock by Westerstrand
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Mid-20th century rococo giltwood framed Swedish cartel clock, by Westerstrand, cream enamel dial with Roman hours and railtrack minutes, Bell striking movement with visible pendulum. Height 56 cm. Provenance: The estate collection of Prof. G. Dawson.
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- 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. - Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.
- Giltwood - Giltwood is used to describe a gold finish on furniture and other decorative wooden items, whereby a thin sheet of gold metal, called gold leaf, is applied to the surface for decorative purposes.
Unlike gilding, where the gold leaf is applied over a coating of gesso, with giltwood the gold leaf is applied direct to the surface, or over a coat of linseed oil gold leaf adhesive.
Most gold-finished mirrors will be gilded, whereas furniture with gold highlights will have the gold applied through the giltwood method.
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