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Clocks Empty Clocks

Post  eddie on Sun Jun 19, 2011 3:56 pm

Clocks Scappamento
Deadbeat escapement used in many pendumlum clocks.
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Post  eddie on Sun Jun 19, 2011 4:06 pm

Clocks 800px-Prague_-_Astronomical_Clock_Detail_1
Astronomical clock and animated figures- Prague.
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Post  eddie on Sun Jun 19, 2011 4:09 pm

Atomic clock:

Clocks FOCS-1
FOCS 1, a continuous cold caesium fountain atomic clock in Switzerland, started operating in 2004 at an uncertainty of one second in 30 million years.
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Post  eddie on Sun Jun 19, 2011 4:11 pm

Clocks 450px-Kerzenuhr
Candle clock.
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Post  eddie on Sun Jun 19, 2011 4:16 pm

Clocks Congreve-fig4
Congreve's Rolling Ball clock as it appeared in his patent application of 1808.

Clocks 400px-Rolling_ball_clock_in_the_British_Museum
A Rolling Ball clock from 1820 in the British Museum.
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Post  eddie on Sun Jun 19, 2011 4:18 pm

Clocks 800px-Digital-clock-alarm
Basic digital alam clock without a radio.
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Post  eddie on Sun Jun 19, 2011 4:20 pm

Clocks 450px-PDphotos-org_alarm_clock_1_bg_050304
Electric clock.
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Post  eddie on Sun Jun 19, 2011 4:23 pm

Clocks 296px-Wooden_hourglass_3
Hourglass.
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Post  eddie on Sun Jun 19, 2011 4:25 pm

Clocks IncenseAlarmClock
Replica of ancient Chinese stick incense clock.
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Post  eddie on Sun Jun 19, 2011 4:28 pm

Clocks 653px-Russian_finished_watch_movement
The movement in a Russian mechanical watch.
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Post  eddie on Sun Jun 19, 2011 4:30 pm

Clocks 220px-Oil-lamp_clock00
18th century oil-lamp clock.
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Post  eddie on Sun Jun 19, 2011 4:35 pm

Clocks Galileo_Pendulum_Clock
Pendulum clock conceived by Galileo Galilei around 1637. The earliest known pendulum clock design, it was never completed.

Clocks 296px-GB-3-Gew-Pendeluhr_%28Luekk%29
German 19th c. pendulum wall clock.
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Post  eddie on Sun Jun 19, 2011 4:38 pm

Clocks 368px-SuSongClock1
A scale model of Su Song's Astronomical Clock Tower, built in 11th century Kaifeng, China. It was driven by a large waterwheel, chain drive, and escapement mechanism.
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Post  eddie on Sun Jun 19, 2011 4:41 pm

Clocks 382px-Al-jazari_elephant_clock
An elephant clock in a manuscript by Al-Jazari (1206 AD) from The Book of Knowledge of Ingenious Mechanical Devices.
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Post  eddie on Sun Jun 19, 2011 4:44 pm

Clocks 800px-Picadillycircuslinearclock
A linear clock at London's Piccadilly Circus tube station. The 24 hour band moves across the static map, keeping pace with the apparent movement of the sun above ground, and a pointer fixed on London points to the current time.
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Post  eddie on Sun Jun 19, 2011 4:48 pm

Clocks 800px-Clock_lock
Quartz clock.

Wiki:

A quartz clock is a clock that uses an electronic oscillator that is regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with 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. Quartz timekeepers are the world's most widely-used timekeeping technology, used in most clocks and watches, as well as computers and other appliances that keep time.

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Post  eddie on Sun Jun 19, 2011 4:50 pm

Clocks Horloge-republicaine1
French decimal clock from the time of the French Revolution.
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Post  eddie on Sun Jun 19, 2011 4:55 pm

Clocks 800px-Seiko_Spacewalk
The Seiko Spacewalk is a limited edition Spring Drive model, designed specifically for use in space.
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Post  eddie on Sun Jun 19, 2011 4:57 pm

Clocks 450px-GastownSteamClock
Gastown steam clock in Vancouver.
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Post  eddie on Sun Jun 19, 2011 5:03 pm

Clocks 798px-Sundial-from-Marcianopolis
Ancient sundial from Marcianopolis.

Clocks 429px-MootHallSundial
SSW facing, vertical declining sundial on Moot Hall, Aldeburgh, Suffolk, England.
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Post  eddie on Sun Jun 19, 2011 5:07 pm

Clocks 361px-
A torsion pendulum or anniversary clock made by S Haller and Sohne in Germany.

Wiki:

A torsion pendulum clock, or torsion clock, is a mechanical clock which keeps time with a mechanism called a torsion pendulum. This is a weighted disk or wheel, often a decorative wheel with 3 or 4 chrome balls on ornate spokes, suspended by a thin wire or ribbon called a torsion spring. The torsion pendulum rotates about the vertical axis of the wire, twisting it, instead of swinging like an ordinary pendulum. The force of the twisting torsion spring reverses the direction of rotation, so the torsion pendulum oscillates slowly, clockwise and counterclockwise. The clock's gears apply a pulse of torque to the top of the torsion spring each rotation to keep the wheel going. The wheel and torsion spring function similarly to a watch's balance wheel and hairspring, as a harmonic oscillator to control the rate of the clock's hands.

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Post  eddie on Sun Jun 19, 2011 5:10 pm

Water clock:

Clocks 430px-AGMA_Clepsydre
A display of two outflow water clocks from the Ancient Agora Museum in Athens. The top is an original from the late 5th century BC. The bottom is a reconstruction of a clay original.
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Post  eddie on Sun Jun 19, 2011 5:15 pm

Clocks 472px-2010-07-20_Black_windup_alarm_clock_face
Traditional windup (keywound) mechanical spring-driven alarm clock.
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Post  eddie on Sun Jun 19, 2011 5:27 pm

Chiming Clock:

Clocks 382px-Big_Ben_2007-1
The Clock Tower (St Stephen's Tower) of the Palace of Westminster, commonly known as Big Ben (in fact, that's the name of the bell), is a famous striking clock.
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Post  eddie on Sun Jun 19, 2011 5:31 pm

Clocks 353px-Du200613
Cuckoo clock, a so-called Jagdst├╝ck, Black Forest, ca. 1900, Deutsches Uhrenmuseum, Inv. 2006-013
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