When wound, the pendulum moves back and forth for about eight days. Ansonia made the clocks in the early 1900s using different figures, including “Huntress,” “Juno” and “Fisher.” ...

When a pendulum clock is running properly, you should hear a rhythmic and even "TICK-TOCK." If you're hearing "tick-TOCK, tick-TOCK," your clock is not going to be running for long.

Instead, through a series of mechanisms that are designed to alter the pendulum’s swing as little as possible, it sends an electrical signal every 30 seconds and kicks the slave clock which is ...

Like London’s Big Ben, the clock’s escapement — the device that converts the force from a weight in the timepiece to its counting mechanism — uses gravity to keep its pendulum swinging.

Previously, [Vinnie] had been stopping the clock every evening, and hoped he would remember to start the pendulum in motion 12 hours later. This was a chore, so he decided to automate the process.

Clocks have been made in forms that depend on the size and shape of the clock's mechanism. The 18th-century tall case, or grandfather, clock was made to hold a long pendulum.

Thus early clock mechanism must have featured a bell but possibly not a dial.” An important milestone in the development of clocks was the pendulum.

"Whereas a spring wound clock has more tension when (first) wound than it does as it nears rewinding." Spring wound clocks or watches need complex mechanisms to overcome that propensity.

The eight-foot pendulum and the rest of the mechanism weighs a hefty 500 pounds. It’s wound by a substantial hand crank more than two feet across.