Japy Freres Girl and Dog Mantle Clock
You must be a subscriber, and be logged in to view price and dealer details.
Subscribe Now to view actual auction price for this item
When you subscribe, you have the option of setting the currency in which to display prices to $Au, $US, $NZ or Stg.
- 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:
Visually similar items
Impressive antique French gilt bronze clock, in the rococo style, mounted with scantily clad putti, on large C scrolls, has pendulum, approx 49 cm high
19th century French brass gilt mantle clock with white enamel dial with Roman numerals flanked by two enamelled and brass cartouches, and surrounded by elaborately crafted gilt work featuring a woman and dog to top and hanging floral work to the base, the
A Louis XVI style ormolu figural mantle clock, later 19th century, with mark of L.P Japy et Cie, 1878; key and pendulum, finely cast with a reclining pelt draped cupid with bow and arrow, a side drum head enclosing an enamel dial marked Bruet, St Denis and
A French bronze mantle clock, Charles Pickard, Paris, circa 1820, the gilt bronze case featuring a young lady in prayer, all on a floriate rock formation above a rococo inspired platform base. The white porcelain dial with cobalt blue Roman numerals, and s