Angie's Clock Catalog, LLC
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African gray clock
Airplane wall clocks
Alligator clock
Aloha wall clock
Ambulance clock
American Flag clocks
Angel Clock
Anniversary 50th clock
Apple wall clock
Astronaut Clock
Baby personalized clock
Baby wall clocks
Bakery clock
Bald eagle clock
Ballet /Ballerina clock
Bathroom Hog clock
Barber shop clock

Be Happy clock
Beach clock
Bear clocks
Beauty salon clock
Bee's bee hive clock
Billiards clocks
Bird clocks
Black panther clock
Bless the cook clock
Blue willow clock
Bowling clocks
Bunny clock
Butterfly clocks
Carousel horse clock
Car clocks
Cat clock
Celestial clock
Cheerleader clock
Cheetah print clocks
Chef clocks
Cherry clocks
Cherry blue clock
Christian clocks
Civil War clock
Clown clocks
Clown fish clocks
Coffee clocks
Colors clock
Computer repair clock
Construction Signs clock
Corporation logo clocks
Counting  minutes clock
Country kitchen clock
Crab clock
Cross stitch clock
Crossword clock
Daisy clock
Deer clock
Dentist clocks
Diner clock
Dinosaur clocks
Doctor clocks
Dog clocks
Dolphin clocks
Dragonfly clock
Drum clock
Duck clocks

Electrician clock
Elephant clock
Fairy clock

Fencing clock
Figure Skating clocks
Fireman clocks
Fireworks clocks
Fishing clock
Flamingo clocks

Flip Flops Clock
Flower clocks
Flying pigs clocks
Food clocks
Frog wall clocks

Fruit clocks
Gingerbread clock
Gingham clocks
Gnome clock
Golf clocks
Graduation clock
Grandchildren clock
Grandma clock
Gym Room clocks
Happy face clock
Hawaii clock
Healey classic car clock
Hearts blue clock
Horse clocks
Hot air balloon clocks
Hot dog stand clock
Hot pepper clock
Hummingbird clock
Ice Cream Clocks
Figure Skating clocks
Indian chief clock
Inspirational clocks
Ivy clock
Java time clock
Jellyfish Clock
Karate clock
Kid's clocks
Koala clock
Ladybug clocks
Ladybird clocks
Laundry room clock
Lemon clocks
Leopard cat clock
Leopard print clock
Librarian clock
Lion clock
Loon clock
Magnolia flower clock
Mammy's clocks
Mechanic clock
Medical clocks
Mermaid clocks
Monarch butterfly clock
Monkey clocks
Moose clock
Motocross clock
Names God /Praise clocks
Nautical clocks
Nine ball clock
Noah's Ark clocks
Nurse clocks
Nursery wall clocks
Orthodontist clocks
Over the hill clocks
Panda bear clocks
Panther clock
Parakeet clock


 

 

Parrot clocks
Pansy clocks
Para shoot clock
Paris clocks
Patriotic Flags
Peacock clocks
Penguin clock
Pet grooming clock
Pharmacist clock
Photographer clock
Piano clock
Pig wall clocks
Pink lips clocks
Pink poodle clocks
Pirate clock
Pizza wall clocks
Planets Space clock

Polar bear wall clock
Pontiac gto wall clocks
Pool room wall clocks
Popcorn clock
Praise clocks
Princess suite clock
Quilting room clocks
Raccoon clock
Raggedy Ann clocks
Raspberry clock
Railroad wall clock
Rodeo clocks
Rooster wall clock
Rubber ducky clocks
Sailboat clock
Sandcastle clock
Scarlet macaw clocks
School bus clock
Seahorse clock
Seashell clocks

Sewing room clock
Skunk clock
Smiley face clock
Solar System clock
Sports clocks
Strawberry clock
Sunflower clocks
Surf boarding clock
Swan wall clock
Tae kwon do clock
Tax time /C.P.A. clock
Teacher clocks
Tie Dye clock
Tiger clocks
Toile wall clock
Train clocks
Trash man Collector clock
Tropical fish clocks
Unicorn clocks
Vacation clock
Valentine's clock
Veterinary clocks
Vintage Style clocks

Watermelon clock
We got crabs wall clock
Western clocks
Weight lifting clocks
White tiger clock
Who Cares clock
Who cares...retired clock
Wild animal clocks
Yorkie/ Yorkshire Dog Clocks
Zebra wall clock

Links

The Evolution of Mechanical Clocks

The operation of a clock depends on a stable mechanical oscillator, such as a swinging pendulum or a mass connected to a spring, by means of which the energy stored in a raised weight or coiled spring advances a pointer or other indicating device at a controlled rate. It is not definitely known when the first mechanical clocks were invented. Some authorities attribute the first weight-driven clock to Pacificus, archdeacon of Verona in the 9th cent. Gerbert, a learned monk who became Pope Sylvester II, is often credited with the invention of a mechanical clock, c.996.

Mechanical figures that struck a bell on the hour were installed in St. Paul's Cathedral, London, in 1286; a dial was added to the clock in the 14th cent. Clocks were placed in a clock tower at Westminster Hall, London, in 1288 and in the cathedral at Canterbury in 1292. In France, Rouen was especially noted for the skill of its clockmakers and watchmakers. Probably the early clock closest to the modern ones was that constructed in the 14th cent. for the tower of the palace (later the Palais de Justice) of Charles V of France by the clockmaker Henry de Vick (Vic, Wieck, Wyck) of Württemburg. Until the 17th cent. few mechanical clocks were found outside cathedral towers, monasteries, abbeys, and public squares.

The early clocks driven by hanging weights were bulky and heavy. When the coiled spring came into use (c.1500), it made possible the construction of the smaller and lighter-weight types. By applying Galileo's law of the pendulum, the Dutch scientist Christiaan Huygens invented (1656 or 1657) a pendulum clock, probably the first. Early clocks used in dwellings in the 17th cent. were variously known as lantern clocks, birdcage clocks, and sheep's-head clocks; they were of brass, sometimes ornate, with a gong bell at the top supported by a frame. Before the pendulum was introduced, they were spring-driven or weight-driven; those driven by weights had to be placed on a wall bracket to allow space for the falling weights. These clocks, probably obtained chiefly from England and Holland, were used in the Virginia and New England colonies.

Clocks with long cases to conceal the long pendulums and weights came into use after the mid-17th cent.; these were the forerunners of the grandfather clocks. With the development of the craft of cabinetmaking, more attention was concentrated on the clock case. In France the tall cabinet clocks, or grandfather clocks, were often of oak elaborately ornamented with brass and gilt. Those made in England were at first of oak and later of walnut and mahogany; simpler in style, their chief decoration was inlay work.

Electric and Other Clocks

Electric clocks were made in the second half of the 19th cent. but were not used extensively in homes until after c.1930. In an analog clock the hands of an electric clock are driven by a synchronous electric motor supplied with alternating current of a stable frequency. Digital clocks use LCDs (liquid crystal diodes) or LEDs (light emitting diodes) to form the numbers indicating the time. The quartz clock, invented c.1929, uses the vibrations of a quartz crystal to drive a synchronous motor at a very precise rate. Some quartz clocks have an error of less than one thousandth of a second per day. The atomic clock, which is based upon the frequency of an atomic or molecular process, is even more precise; a seventh-generation cesium-beam clock will lose less than a second in three billion years.

Some Famous Clocks

One of the most famous clocks is in the cathedral of Strasbourg; the clock was first placed in the cathedral in 1352, and in the 16th cent. it was reconstructed. In the 19th cent. a new astronomical clock (so called because it shows the current positions of the sun, moon, and other heavenly bodies in addition to the time of day) similar to the original clock was constructed; its elaborate mechanical devices include the Twelve Apostles, a crowing cock, a revolving celestial globe, and an automatic calendar dial. Among other well-known clocks of the world are the clock known as Big Ben in the tower next to Westminster Bridge in the British Houses of Parliament and the tower clock in the Metropolitan Life Insurance Company building, New York City.