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History of Clock

Serrano, Lhean Angelique P.3IND1

ClockAn instrument used to indicate timeDevice for measuring and displaying timeOne of the oldest human inventionsNot always display time but it may also used to control a

device according to time.

ClockSUNDIAL B.C. 742

oldest devicethe sun casting a shadow onto

a cylindrical stone. it can only tell time when the

sun is shining.

ClockCLEPSYDRAE 1400 BC

Water clockInvented by the EgyptiansUsed during at night and

cloudy daysThe amount of water that

flowed into and out of a device.

ClockSANDGLASS A.D. 330

HourglassFine sand pours through tiny

hole at a constant rate.Indicates a predetermined

passage of an arbitrary period

ClockCandle and Stick of

IncenseA.D. 885

It burned down at approximately predictable speeds to estimate the passing time.

Alfred the great used candles as clocks.

ClockYear Divided into Months and DaysGreeks who worked on a

system taken from the ancient Babylonians and Egyptians.

ClockDividing the day into hours and secondsBabylonians and Greeks

divided the day into 12 hours of each light and dark. (Equinox days)

Hipparchus with Greek astronomers used Sumerial sexagesimal system. The astronomical calculation was a base of 60.

ClockAstronomical Clock Tower A.D.1020-1101

Song Dynasty Horologist and Engr. Su Song

It was driven by a large waterwheel, chaindrive and escapement mechanism

ClockMercury Clock A.D. 1277

First mercury powered automata clock

It was described in the Libros del Saber

Invented by Ibn Khalaf al-Muradi (Muslim)

ClockA.D. 1283

A large clock was installed at Dunstable Priory.

It was not a water clock

Clock‘Great Horloge’ A.D. 1292

It was installed in Canterbury Cathedral

Clock‘ 2 METRE ’ A.D. 1322It was installed in NorwichThis had a large ‘ 2 metre’

astronomical dial with automata and bells.

Clock Richard Wallingford’s Clock A.D. 1336It had a large astrolabe-type

dial, showing the sun, the moon’s age, phase, and node, a star map.

It had a wheel of fortune and an indicator of the state of the tide at the London Bridge.

The bell rang every hour.

ClockDondi’s Clock A.D. 1348-1364

Giovanni de DondiIt was a seven-sided

construction, 1 metre high with dials showing the time of day, including min.,motion of planets, an automatic calendar of fixed and movable feasts and a n eclipse prediction hand rotating once every 18 years.

Clock“Horologia” , “ Horologe” A.D. 1368

Greek wordIt was the sound of bells of the

mechanical clocksClockmaking in England

started.

ClockSalisbury Cathedral Clock A.D. 1386

World’s Oldest Suriving Mechanical Clock that strikes the hours.

ClockSpring-driven clock A.D. 1430

It is the chamber clock given to Peter the Good, Duke of Burgundy

It is now placed in Germanisches National Museum.

ClockClock Dials A.D. 1475

Early clock dials did not indicate minutes and seconds.

A clock with a dial indicating minutes was illustrated in a manuscript by Paulus Almanus.

Clock‘ Second Hand’ A.D. 1560

A second hand clock was placed in the Fremersdorf Collection.

However, this clock could not have been accurate. It was probably for indicating that he clock was working.

ClockMechanical weight-driven astronomical clock

A.D. 1556-1559It is a mechanical weight-driven

astronomical clock with a verge-and-foliot escapement, a striking train of gears, an alarm, and a representation of the moon’s phases.

Ottoman Engr. Taqi al-Din

Clock‘ Three Dials’ A.D. 1577-1580

It is an observational clock for the Istanbul observatory of Taqi al-Din

“ A mechanical clock with three dials which shows the hours, the minutes, and the seconds.”

ClockBürgi’s Clock A.D. 1584

The cross-beat escapement was invented by Jost Bürgi, who also developed the remontoire.

It was a great improvement in accuracy as they were correct to within a minute a day.

ClockA.D. 1581

An Italian Atronomer and Physicist, Galileo, discovered the properties of the Pendulum

ClockA.D. 1610

Wathcmaking industry commenced in Geneva.

ClockPendulum-driven clock A.D. 1657

Christiaan Huygens, Dutch Physicist, who made the first controlled pendulum clock.

He determined the mathematical formula that related pendulum length to time (99.38 cm or 39.13 ‘’ for the one second movement.

ClockPendulum Suspension Spring A.D. 1670 - 1It is introduced by the English

clockmaker, William Clement.Within just one generation,

minute hands and then second hands were added.

ClockH5 A.D. 1761

It doesn't contain pendulum.It could determine longitude

accuratelyJohn HarrisonHis H5 clock was in error by

less than 5 seconds over 10 weeks.

ClockNovember 17, 1791

Eli Terry is known as the founder of the American clock-making industry.

Clock1840-1841

Alexander Bain, Scottish clockmaker

He was the first patented the electromagnetic pendulum.

The clocks were working with external batteries.

ClockUnited States 19th century

Clocks were one of the first items to be mass produced and also to use interchangeable parts.

The clock has batteries inside.

ClockQuartz Crystal Clock A.D. 1970

Quartz Crystal is a rock that looks like a glass.

An electronic oscillator is used and regulated by the quartz crystal to keep time.

It is more accurate than the mechanical clocks

It has been the popular clocks used in timekeeping technology.

ClockModern Day Clocks:

Digital Clock20th century

Display a numeric representation of time.

The 12-hour notation with am/pm.

ClockTalking clock 20th century

For convenience, distance, telephony or blindness, auditory clocks present the time as sounds.

Sound : Spoken natural language or as auditory codes.

ClockProjection Clock 20th century

Some digital clocks include an optical projector that shines a magnified image of the time display onto a screen or onto a surface.

ClockTactile Clocks 20th century

These are clocks for the blind that have displays that can be read by using the sense of touch.

A device using Braille code to show the digits so they can be felt with the fingertips.

CLOCK

Time line of Clock

BC AD

742 : Sundial 330 : Sandglass 1400 : Clepsydrea 885 : Candle & Stick of Incense

Timeline of ClockCentury

1oth - 11th 12th 13th 14th 15th

Astronomical Clock Tower 1277 :Mercury Clock

1322 : Astronomical Dial

1430 : Spring-Driven Clock 1556 - 1559 :

with automat and bells Mechanical weight

1283 : Dunstable Priory 1475 : Clock Dials driven astronomical

1336 : Richard clock

1292 : 'Great Horloge' Willingford's Clock

1560 : ' Secondhand

1348-1364 : Dondi's Clock clock

1577 - 1580 : 1368 : "Horologia" Three Dials' clockmaking in Egland 1581 : Pendulum by Galileo 1584 : Bürgi's clock

Timeline

Century

16th 17th 18th 19th 20th

1610 : Watchmaking 1761 : H5 clock 1840 -1 : 1st Clock has Digital Clock

Industry in Geneva patented the batteries inside

1771 : Eli Terry Electromagnetic Talking Clock

1657 : Pendulum pendulum 1970 : Quartz

driven clock Crystal clock Projection Clock

1670 - 1 : Pendulum Tactile Clock

Suspension Spring