19th Century French Rococo Revival Mantel Clock
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A French Ormulu mantel clock, late 19th century, a French ormolu rococo revival figural mantel clock surmounted by a boy gathering wheat with a scythe beside a rustic fence, the white enamel dial with black Roman numerals, within an ornate scrollwork case and feet, the unmarked eight day bell striking movement; missing bell, front glass and back plate, with key and pendulum, height 37 cm, width 35 cm depth 13 cm
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- 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.
- Rustic - Rustic is defined as "of, relating to, or typical of country life or country people", and the items illustrated in this price guide accord with that definition.
But in the 18th and 19th century "rustic furniture" had a narrower definition. It referred to furniture where the framework was carved or moulded to resemble tree trunks and branches, and was usually for outdoor use. Rustic furniture was made in cast iron, wood, terracootta and concrete. Much of the Coalbrookdale company's cast iron furniture was of rustic design. - 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.
- Back Plate - On many types of clocks, the movement operates between two plates, usually made of brass, one at the back, and the other at the front, which forms a mount for the dial.
On English bracket, mantle and table clocks the backplate was often visible through a glass door or panel from the late 17th century, and could be profusely engraved with scrolling decorations, flowers, foliage, birds, and figures. The engraving could also include the maker?s name.
The amount of engraving reduced and became simpler as the 18th century progressed, and by 1800, had been reduced to a border, often with the maker's name in the centre. By the early 1800s all decoration had ceased, and only the maker's name was added, and by the Victorian era, most bracket, mantle and table clocks had no engraving.
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