19th Century Swedish Pine Long Case Clock

A Northern Swedish pine long case clock, 19th century, the case…
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A Northern Swedish pine long case clock, 19th century, the case of typical rococo style with exaggerated curves, painted dial with 2 cast iron weights and pendulum and bell chime body with lenticle to door, restored works, height 202 cm, width 60 cm depth 18 cm

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  • Lenticle in a Long Case Clock - A lenticle in a long case clock (also known as grandfather clocks) is a convex lens used usually located as a small circular window on the front door of the clock case, just below the clock face. The lenticle enables the pendulum to be viewed without needing to open the door in the trunk. The lens is convex, meaning that it bulges outward, and is made of glass
  • 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.

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