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How to Fix a Pendulum Mechanism on Brass Clocks

Brass pendulum clocks are popular antiques that work much differently than the digital clocks we know today. Although brass pendulum clocks are not as accurate as digital clocks, they have historic charm and add character to a room. Large grandfather clocks are one of the best-known types of pendulum clock, but they come in many different sizes. Since brass pendulum clocks contain many carefully calibrated mechanisms, it is important to take proper care while moving them. Due to age or former mishandling, the pendulum on a brass clock can sometimes stop swinging or get out of rhythm and must be adjusted.

Instructions

    • 1

      Identify the problem with your pendulum clock. Is the pendulum not swinging at all? Is it moving too quickly or too slowly?

    • 2

      Adjust your pendulum if it has stopped moving -- this problem is caused by the clock being out of rhythm. Listen to the clock tick; if the beat is not even (if it doesn't make a regular tick-tock-tick-tock), pull the pendulum to one side of the clock and release it so it can swing as wide as possible. The pendulum should automatically correct its rhythm after this and begin moving with an even beat.

    • 3

      Adjust the speed and rhythm of the pendulum if it moves too quickly or too slowly. Turn the pendulum bob to adjust the speed. The pendulum bob is a nut located at the bottom tip of the pendulum rod. If your clock needs to run faster, turn the bob to the right. If you need to slow the clock down, turn the bob to the left. A small adjustment of the bob changes the speed of the clock significantly; a complete turn of the bob changes the speed of the clock by approximately 30 seconds in a day. Continue adjusting a little at a time over several hours or days until you confirm the clock is keeping accurate time again.

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Interior Home Repair
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