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2. Shortt–Synchronome clock - Wikipedia

   en.wikipedia.org/wiki/Shortt–Synchronome_clock

   On the left is the primary pendulum in its vacuum tank. The Shortt–Synchronome free pendulum clock is a complex precision electromechanical pendulum clock invented in 1921 by British railway engineer William Hamilton Shortt in collaboration with horologist Frank Hope-Jones, [1] and manufactured by the Synchronome Company, Ltd., of London. [2]

3. Gridiron pendulum - Wikipedia

   en.wikipedia.org/wiki/Gridiron_pendulum

   The rods are connected by a frame in such a way that their different thermal expansions (or contractions) compensate for each other, so that the overall length of the pendulum, and thus its period, stays constant with temperature. The gridiron pendulum was used during the Industrial Revolution period in pendulum clocks, particularly precision ...

4. Atmos clock - Wikipedia

   en.wikipedia.org/wiki/Atmos_clock

   Jaeger-LeCoultre's Atmos clock on display. Atmos is the brand name of a mechanical torsion pendulum clock manufactured by Jaeger-LeCoultre in Switzerland. The clock gets the energy it needs to run from temperature changes in the environment and does not need to be wound manually. It can run for years without human intervention.

5. This Alarm Clock Shows You the Date, Time and Temperature ...

   www.aol.com/entertainment/alarm-clock-shows-date...

   See It! Get the La Crosse Technology Soluna-S Light Sunrise Black LCD Alarm Clock with Temperature and USB Port for just $23 (originally $36) at Walmart!. According to one customer, “This ...

6. Pendulum clock - Wikipedia

   en.wikipedia.org/wiki/Pendulum_clock

   A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. The advantage of a pendulum for timekeeping is that it is an approximate harmonic oscillator : It swings back and forth in a precise time interval dependent on its length, and resists swinging at other rates.

7. Radio clock - Wikipedia

   en.wikipedia.org/wiki/Radio_clock

   A modern LF radio-controlled clock. A radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly [1]) referred to as an "atomic clock", is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock.