Black slate mantle clock with key & pendulum. Some damage.…
click the photo to enlarge
Black slate mantle clock with key & pendulum. Some damage. Height 27.5 cm

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.

This item has been sold, and the description, image and price are for reference purposes only.
  • 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

Ansonia 'Cairo' mantle clock, with 8 day striking movement (bell), 39 cm high, with key & pendulum

Sold by in for
You can display prices in $Au, $US, $NZ or Stg.

French Medaille de Bronze mantle clock, with 8 day movement, in marble and slate case (some chips), movement striking has been removed, key and pendulum included, 33 x 14 cm

Sold by in for
You can display prices in $Au, $US, $NZ or Stg.

A late-19th century slate and veined marble mantel clock with architectural case; two-train pendulum driven movement; Ansonia clock Co. Height 35 cm

Sold by in for
You can display prices in $Au, $US, $NZ or Stg.

Ansonia 'Venice' cast iron cased mantle clock, circa 1901 American 8 day movement, with key and pendulum, 41 cm width, 26 cm height approx

Sold by in for
You can display prices in $Au, $US, $NZ or Stg.