Clocks 2 - Clock Hands - Grandfather Clock - Pendulum Clock - Best Shot Footage - Stock Footage

Various Clocks, Close Up Of Clock Hands, Close Up Of Pendulum, Grandfather Clock, LongCase Clock. A clock is an instrument used to indicate, keep, and co-ordinate time. The word clock is derived ultimately (via Dutch, Northern French, and Medieval Latin) from the Celtic words clagan and clocca meaning "bell". A silent instrument lacking such a mechanism has traditionally been known as a timepiece.[1] In general usage today a "clock" refers to any device for measuring and displaying the time. Watches and other timepieces that can be carried on one's person are often distinguished from clocks. A longcase clock, also tall-case clock, floor clock, or grandfather 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 meters (6--8 feet) tall. The case often features elaborately carved ornamentation on the hood, or bonnet, which surrounds and frames the dial, or clock face. The English clockmaker William Clement is credited with the development of this form in 1670. Most longcase clocks are striking clocks, which means they sound the time on each hour or fraction of an hour. The terms "grandfather", "grandmother", and "granddaughter" have all been applied to longcase clocks. Although there is no specifically defined difference among these terms, the general consensus seems to be that a clock smaller than 1.5 m (5 ft) is a granddaughter; over 1.5 m (5 ft) is a grandmother; and over 1.8 m (6 ft) is a grandfather. A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. The advantage of a pendulum for timekeeping is that it is a resonant device; it swings back and forth in a precise time interval dependent on its length, and resists swinging at other rates. From its invention in 1656 by Christiaan Huygens until the 1930s, the pendulum clock was the world's most precise timekeeper, accounting for its widespread use.[1] [2] Pendulum clocks must be stationary to operate; any motion or accelerations will affect the motion of the pendulum, causing inaccuracies, so other mechanisms must be used in portable timepieces. They are now kept mostly for their decorative and antique value

Category:

Film & Animation

Tags:

• Clocks 2
• Clock Hands
• Grandfather Clock
• Longcase Clock
• Pendulum
• Best Shot Footage
• Stock Footage

[remboy3000]

screamer?