Clocks & Watches

Muawiya A. Abu Jubain

A Thought

"Space and time are modes by "Space and time are modes by which we think, not conditions which we think, not conditions

under which we live." under which we live."

Albert Einstein.Albert Einstein.

The Beginning of time

The Cro-Magnons recorded the phases The Cro-Magnons recorded the phases of the Moon some 30,000 years ago.of the Moon some 30,000 years ago.

The Beginning of time

The first minutes were counted The first minutes were counted accurately only 400 years ago.accurately only 400 years ago.

How did it all really start?

The ancient Egyptians were expert The ancient Egyptians were expert astronomers who studied the Sun's astronomers who studied the Sun's

recurrent movements and their recurrent movements and their effects on the Earth very closely.effects on the Earth very closely.

How did it all really start?

By plotting the beginning of the By plotting the beginning of the Nile's flood each year, a reliable Nile's flood each year, a reliable

harbinger of seasonal change, they harbinger of seasonal change, they measured a cycle 365 days long.measured a cycle 365 days long.

How did it all really start?

Astronomers found that each year, Astronomers found that each year, on the appointed day, the star on the appointed day, the star

Sirius appeared about six hours Sirius appeared about six hours later than the previous year. This later than the previous year. This quarter-day difference led them to quarter-day difference led them to

adjust the solar year to 365.25 adjust the solar year to 365.25 days.days.

The History of the Clocks

There is no agreement between There is no agreement between historians on the history of the historians on the history of the

clock.clock.

The History of Clocks

The word The word ClockClock was first used in was first used in the 14the 14thth century. century.

It comes from the Latin word It comes from the Latin word CloccaClocca which means Bell. which means Bell.

The SUN is the 1st clock

The first way that people could The first way that people could tell the time was by looking at tell the time was by looking at the sun as it crossed the sky.the sun as it crossed the sky.

The Sundial Clock

The oldest type of clock is a sundial The oldest type of clock is a sundial clock, also called a sun clock. They clock, also called a sun clock. They were first used around 3,500 B.C. were first used around 3,500 B.C.

(about 5,500 years ago).(about 5,500 years ago).

The Sundial Clock

Since sundials depend on the Since sundials depend on the sun, they can only be used to sun, they can only be used to tell the time during the day.tell the time during the day.

The Water Clock

Around 1400 B.C. (about 3,400 Around 1400 B.C. (about 3,400 years ago), water clocks were years ago), water clocks were

invented in Egypt.invented in Egypt.

The Water Clock

Water clocks worked better than Water clocks worked better than sundials because they told the sundials because they told the time at night as well as during time at night as well as during the day. They were also more the day. They were also more

accurate than sundials.accurate than sundials.

Pendulum Clocks

The first practical clock was driven by a The first practical clock was driven by a pendulum. It was developed by Christian pendulum. It was developed by Christian

Huygens around 1656. By 1700, the Huygens around 1656. By 1700, the pendulum clock also had a minute hand. pendulum clock also had a minute hand.

Pendulum Clocks

One problem with pendulum One problem with pendulum clocks is that they stopped clocks is that they stopped

running after a while and had to running after a while and had to be restarted. be restarted.

Means to recharge a pendulum clock

Winding the Clock,Winding the Clock,BatteriesBatteries

OrOrQuartz CrystalQuartz Crystal

Watches

The first watch to exist was the The first watch to exist was the Pocket WatchPocket Watch

The Automatic “perpetual” watch

The first one was invented by a The first one was invented by a Belgian watchmaker, Hubert Belgian watchmaker, Hubert Sarton in the 18Sarton in the 18thth century. century.

The Solar Powered watch

Light is the source of Light is the source of powerpower

For this watch.For this watch.

The thing about Clocks and Watches

What do we want from them? What do we want from them?

Quality and Expensive Watches !!! Quality and Expensive Watches !!!

They are made to tell Time They are made to tell Time

Sun Dial Clocks Couldn’t tell Sun Dial Clocks Couldn’t tell timetime

At Night.At Night.

Water Clocks Need To Be Water Clocks Need To Be MaintainedMaintained

Every time the Water Finishes Every time the Water Finishes

Mechanical Clocks and WatchesMechanical Clocks and WatchesNeed to be Winded every once in Need to be Winded every once in

aaWhileWhile

Perpetual Watches need to Perpetual Watches need to bebe

Shaken Every Once in While Shaken Every Once in While

Solar Watches Need Only Solar Watches Need Only LightLight

Some Watches & Clocks Make Some Watches & Clocks Make LoudLoud

Sound/Noise While WorkingSound/Noise While Working

Some Clocks and Watches are Some Clocks and Watches are used asused as

Alarm Clocks Alarm Clocks

Some are used as Timers and Some are used as Timers and Stop Watches Stop Watches

Some Clocks and WatchesSome Clocks and WatchesAlways Give you the WrongAlways Give you the Wrong

TimeTime

How About People? How About People?

The The DAY WorkersDAY Workers

The The MaintainablesMaintainables

The The Status SearchersStatus Searchers

Are they aiming to produce Quality Work?Are they aiming to produce Quality Work?

Are they aiming for the status?Are they aiming for the status?

The The ShakablesShakables

The The Noise MakersNoise Makers

The The False AlarmersFalse Alarmers

The The Time BombersTime Bombers

The The Alarmers Alarmers (Escalators)(Escalators)

The The False False FeedbackersFeedbackers

CombinationsCombinations

If you are to buy a If you are to buy a watch/clock, which type you watch/clock, which type you

want it to be?want it to be?

If you are to be a If you are to be a clock/watch, which one clock/watch, which one would you want to be?would you want to be?

Thank You