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2. Torsion pendulum clock - Wikipedia

   en.wikipedia.org/wiki/Torsion_pendulum_clock

   A torsion pendulum clock, more commonly known as an anniversary clock or 400-day clock, is a mechanical clock which keeps time with a mechanism called a torsion pendulum. This is a weighted disk or wheel, often a decorative wheel with three or four chrome balls on ornate spokes, suspended by a thin wire or ribbon called a torsion spring (also ...

3. Cuckoo clock - Wikipedia

   en.wikipedia.org/wiki/Cuckoo_clock

   The cuckoo bird is activated by the clock movement as the clock strikes by means of an arm that is triggered on the hour and half hour. [3] There are two kinds of movements: one-day (30-hour) and eight-day clockworks. Some have musical devices, and play a tune on a Swiss music box after striking the hours and half-hours. Usually the melody ...

4. Mantel clock - Wikipedia

   en.wikipedia.org/wiki/Mantel_clock

   In contrast to wall clocks, whose movements were attached to the back board, the shelf clock had its movement supported by a seat board. In the 1790s in Boston, Simon Willard began selling other standardized shelf clocks. Indeed, it looked like a standard tall clock whose hood and base were directly conjoined and whose body was missing.

5. Grandfather clock - Wikipedia

   en.wikipedia.org/wiki/Grandfather_clock

   A grandfather clock (also a longcase clock, tall-case clock, grandfather's clock, hall clock or floor clock) is a tall, freestanding, weight-driven pendulum clock, with the pendulum held inside the tower or waist of the case. Clocks of this style are commonly 1.8–2.4 metres (6–8 feet) tall with an enclosed pendulum and weights, suspended by ...

6. History of timekeeping devices - Wikipedia

   en.wikipedia.org/wiki/History_of_timekeeping_devices

   The first clock known to strike regularly on the hour, a clock with a verge and foliot mechanism, is recorded in Milan in 1336. [96] By 1341, clocks driven by weights were familiar enough to be able to be adapted for grain mills, [97] and by 1344 the clock in London's Old St Paul's Cathedral had been replaced by one with an escapement. [98]

7. Pendulum clock - Wikipedia

   en.wikipedia.org/wiki/Pendulum_clock

   The mechanism which runs a mechanical clock is called the movement. The movements of all mechanical pendulum clocks have these five parts: [27] A power source; either a weight on a cord or chain that turns a pulley or sprocket, or a mainspring. A gear train (wheel train) that steps up the speed of the power so that the pendulum can use it.