A Sevres style porcelain mounted ormolu mantel clock by Le Roy…
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A Sevres style porcelain mounted ormolu mantel clock by Le Roy & Fils, Paris, late 19th century, the domed clock with a porcelain dial and Roman numeral cartouches, centred with a a pair of demi-figures, and flanked by elaborately cast pillars, with porcelain ornaments and raised on figural cast feet, raised on a giltwood stand, with pendulum, 39 cm high, 29 cm wide, 13 cm deep. Provenance: The Estate of Paul Benjamin Phillip Krongold
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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. - 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. - Ormolu - Ormolu was popular with French craftsmen in the 18th and 19th century for ornamental fittings for furniture, clocks and other decorative items. True ormolu is gilt bronze, that is bronze that has been coated with gold using a mercury amalgam. Due to the health risks associated with using mercury, this method of creating ormolu was discontinued in France in the 1830s. A substitute was developed consisting of about 75% copper and 25% zinc, however it was inferior to the bronze version. It was often lacquered to prevent it tarnishing.
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