Pendulum clocks are usually designed to be set by opening the glass face cover and manually pushing the minute hand around the dial to the correct time. The minute hand is mounted on a slipping friction sleeve which allows it to be turned on its arbor. The hour hand is driven not from the wheel train but from the minute hand's shaft through a small set of gears, so rotating the minute hand manually also sets the hour hand. Styles Pendulum clocks were more than simply utilitarian timekeepers; due to their high cost they were status symbols that expressed the wealth and culture of their owners. They evolved in a number of traditional styles, specific to different countries and times as well as their intended use. Case styles somewhat reflect the furniture styles popular during the period. Experts can often pinpoint when an antique clock was made within a few decades by subtle differences in their cases and faces. These are some of the different styles of pendulum clocks: Act of Parliament clock Anniversary clock (uses a torsion pendulum) Banjo clock Bracket clock Cartel clock Comtoise or Morbier clock Crystal regulator Cuckoo clock Grandfather clock Lantern clock Mantel clock Master clock Ogee clock Pillar clock Schoolhouse regulator Turret clock Vienna regulator Zaandam clock See also Pendulum (mathematics) Pendulum Cycloidal pendulum Flying pendulum clock Longcase clock (grandfather clock) Steam clock Balance spring (hairspring) References External links The Invention of Clocks The (Not So) Simple Pendulum The earliest Dutch and French Pendulum clocks, 1657-1662 Computer-Aided Design and Kinematic Simulation of Huygens’s Pendulum Clock Clocks Clock designs Pendulums Inventions by Christiaan Huygens Oscillators