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2. Pendulum clock - Wikipedia

   en.wikipedia.org/wiki/Pendulum_clock

   [12] [4] With these improvements, by the mid-18th century precision pendulum clocks achieved accuracies of a few seconds per week. Until the 19th century, clocks were handmade by individual craftsmen and were very expensive. [3]: p.625 The rich ornamentation of pendulum clocks of this period indicates their value as status symbols of the wealthy.

3. Anchor escapement - Wikipedia

   en.wikipedia.org/wiki/Anchor_escapement

   The backward motion of the escape wheel during part of the cycle, called recoil, is one of the disadvantages of the anchor escapement.It results in a temporary reversal of the entire wheel train back to the driving weight with each tick of the clock, causing extra wear in the wheel train, excessive wear to the gear teeth, and inaccuracy.

4. Shortt–Synchronome clock - Wikipedia

   en.wikipedia.org/wiki/Shortt–Synchronome_clock

   [10] [12] Shortt clocks kept time with two pendulums, a primary pendulum swinging in a vacuum tank and a secondary pendulum in a separate clock, which was synchronized to the primary by electro-mechanical means. The secondary pendulum was attached to the timekeeping mechanisms of the clock, leaving the primary pendulum virtually free of ...

5. List of largest clock faces - Wikipedia

   en.wikipedia.org/wiki/List_of_largest_clock_faces

   A list of permanent working clocks with the largest faces in the world. Entries include all clocks with faces at least 4 m (13 ft) in diameter. Clocks can be located on the exterior or interior of buildings, and towers as well as on the ground as is the case with floral clock faces.

6. Bracket clock - Wikipedia

   en.wikipedia.org/wiki/Bracket_clock

   The term originated with small weight-driven pendulum clocks (sometimes called 'true bracket clocks') that had to be mounted on a bracket on the wall to allow room for their hanging weights. [2] When spring-driven clocks were developed, which didn't require hanging weights to power them, they continued to be made in the bracket style.

7. 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 ...