HOW IT WORKS AND WHAT MAKES IT STOCKIntroductionA grandfather clock (also called a long or tall case clock) is a self-contained mechanical timekeeping device measuring from six to eight feet high. These clocks can be driven by a weight or a spring and operate according to the law of gravity. In weight models, a large pendulum (three to five feet long) hangs in the center and a system of weights is attached inside the clock. Gravity constantly swings the pendulum back and forth, moving the weights at the appropriate times to keep the hands on the clock face accurate. Spring models are the same except that a coil spring is used instead of weights. For the purposes of this article, we will focus on weight-driven clocks. Owners should use a wrench to lift the weights, because over time the weights will fall due to gravity and the clock will stop unless rewound. The gears control all mechanical functions of the clock (i.e. the movements of the hands). Grandfather clocks are made from wood, such as pine, beech, oak, mahogany and cherry. Owners have the option to turn a chime on or off, used to tell the time, and the clock's wooden case acts as an echo chamber for the chime. Grandfather clocks have two main parts: the case and the cover. The chest houses the pendulum, weight and chime rods behind a glass door. The cover displays the clock face and encloses the clock mechanisms. An optional moon dial can also be found above the clock face. The trunk and hood are traditionally very ornamental. A grandfather clock was designed to tell time, so only an hour and minute hand is needed to do this, but because they are ornamental, they also become beautiful family heirlooms. What defines a mechanical clock...... middle of paper .. ....one has to move a selector lever to "Chime-silent" when they don't want to hear it or in some clocks they have to other chime options. Sometimes the chimes are labeled “Melody 1” or something similar. It is important not to move the selector while the clock is chiming, as the chime hammers will break. There's also a nighttime shut-off lever, so owners won't be disturbed by chimes while they sleep. Conclusion The design of the grandfather clock demonstrates great artistic talent and despite technological advancements, it remains a symbol of excellence. The principles of mechanical energy (i.e. weights and gears) along with the use of a pendulum create an accurate watch. Winding the clock keeps the mechanisms running and allows a chime function to operate. As long as the owner keeps the clock wound and takes appropriate steps, this clock can last through generations..