Sometimes referred to as longcase clock, tall-case clock, Tower clock, floor clock, or Grandfather Clock; it is a
pendulum clock with the pendulum held inside the tower case, or waist of the case. Clocks of this style are commonly
around 1.8 meter to 2.4 meter (6 to 8 feet) tall. The case often features elaborately carved ornamentation on the hood
which surrounds or frames the dial (clock face). The English clockmaker William Clement was credited for the
development of this form of clock in 1670. Most longcase clocks are striking clocks, which means they sound the time on
each hour or fraction of an hour.
Torsion clocks are usually delicate, ornamental, spring-wound mantel clocks. The polished clock mechanism is exposed under a glass case or dome to allow people to watch the torsion pendulum turn. Clocks of this style were first made by Anton Harder around 1880. They are also known as 400-day clocks, or anniversary clocks because many of them have to be wound only once a year.
Atmos is the brand name of a mechanical clock manufactured by Jaeger LeCoultre in Switzerland; it does not need to be wound up; it gets the energy it needs to run from small temperature changes in the environment, and can run for years without human intervention. Its power source is a hermetically sealed capsule containing a mixture of gas and liquid ethyl chloride, which expands into an expansion chamber as the temperature rises, compressing a spiral spring. When the temperature falls, the gas condenses causing the spring to relax. This action continously winds the mainspring. A variation in temperature of only one degree in the range between 15 and 30 degrees Celsius is sufficient for two days of operation!
O.G. (Ogee) Clocks
An Ogee clock is a common kind of weight-driven 19th-century pendulum clock in a simplified Gothic taste, made in the United States for a mantelpiece or to sit upon a wall bracket. An Ogee clock is rectangular with Ogee-profile molding that frames a central glass door that protects the clock face and the pendulum. The door usually carries a painted scene in the area beneath the face. Ogee clocks are one of the most commonly encountered varieties of American antique clocks.
A cuckoo clock is a clock that is typically pendulum driven; it strikes the hour using small bellows and pipes that imitate the call of the Common Cuckoo in addition to striking a wire gong. The mechanism which produces the cuckoo call was installed in almost every kind of cuckoo clock since the middle of the eighteenth century and has remained almost without variation until the present day.
A quartz clock is a clock that uses an electronic oscillatro that is regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with a very precise frequency, so that quartz clocks are at least an order of magnitude more accurate than good mechanical clocks. Generally, some form of digital logic counts the cycles of this signal and provides a numeric time display, usually in units of hours, minutes, and seconds. Since the 1970s, quartz clocks have become the most widely used timekeeping technology.
An electric clock is one that is powered by an electrical motor rather than manually (spring) or by other sources of energy specifically to wind the mainspring or to drive the pendulum or the oscillator. In 1814, Sir Francis Ronalds (1788) of London invented the forerunner of an electric clock: the Electrostatic clock. His prototype was powered with a dry pile battery; however, it proved unreliable in timekeeping because of a strong dependency on a stable room temperature and 'weather conditions'!
Mantle & Wall Clocks
And Many, Many More!!!