Old instruments
Pendulum Clock
Direct answer
Pendulum Clock is a clock whose oscillator is a swinging pendulum with a repeatable period.
Pendulum Clock is a gravity-regulated mechanical clock used in historical astronomy, timekeeping, or navigation.
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At a glance
- Found in
- Historical Almanacs & Instruments
- Related
- Astronomical Clock, Regulator Clock, Clepsydra, Water Clock
Pendulum Clock is a gravity-regulated mechanical clock used in historical astronomy, timekeeping, or navigation.
An engraved functional orientation; the page explains the real instrument, method, or publication.
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The story behind Pendulum Clock
Seventeenth-century pendulum clocks transformed precision time measurement on land and later observatory practice.
A one-minute story
The Book of the Sky
How people learned to read the sky, from Babylon to the day you were born.
Why Pendulum Clock matters
Pendulum Clock matters because its regular motion enabled a major improvement in terrestrial timekeeping and astronomical timing.
How to read Pendulum Clock
Pendulum Clock by keeping it level, stable, and near the conditions speaks to which its pendulum length and compensation were adjusted.
Pendulum Clock in practice: an example
A seconds pendulum can drive a clock train that marks regular intervals during a transit observation.
Where readings of Pendulum Clock go wrong
A free pendulum clock performs poorly on a moving ship and its rate changes with environment and effective gravity.
Sources and editorial method
Research references used for this entry include:
- Royal Museums Greenwich: A Unique History of Timekeeping - Museum overview of marine chronometers, astronomical regulators, and the development of precision timekeeping.
- Source
- The Great Almanac Dictionary
- Category
- Historical Almanacs & Instruments
- Last updated
- 2026-09-26
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Common questions
What is a pendulum clock?
Pendulum Clock is a clock whose oscillator is a swinging pendulum with a repeatable period.
What do people get wrong about a pendulum clock?
A free pendulum clock performs poorly on a moving ship and its rate changes with environment and effective gravity.
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