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Alarm clock

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Par   •  3 Mai 2017  •  Étude de cas  •  424 Mots (2 Pages)  •  704 Vues

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Alarm Clock


The water clock : The oldest clock in history are supposed to be the water clock. We put the water into the top of a “vessel” and it fall through a small hole for a set amount of time. It doesn’t wake up.

Plato change the water clock by adding a component that wake people up.
He added a syphoning tube that make enough noise to wake people up.

The prayer bell: It is a bell that is rung to remind people to pray in the right time.

The knocker-uppers: It is a popular method, at least in Britain and Ireland, that involve to hire a knocker-upper, a person who use everything from a truncheon to a pea shooter, the knocker-upper would bang on doors and windows to wake those inside.

In 1920, this unique profession began to fade away as alarm clock spread.

The first mechanical alarm clock:

The creator of the first mechanical alarm clock is Levi Hutchins, an American who in 1787 invented a personal alarm device to wake him at 4 a.m. However, Hutchins was just interested in morning rising so he never marketed it. Though other alarm clocks existed previously, it seems Hutchins had not heard of them.

Half a century later, Frenchman Antoine Redier became the first to sell an adjustable alarm clock, in 1847. The adjustable alarm clock allowed the user to set a time to awake, rather than being ruled by the dictates of others.

Actually, historians believe that personal mechanical alarm clocks originated in Germany in the 15th century, but their inventors are unknown.


The companies continued to improve, with portable travel alarm clocks and radio alarm clocks that allowed consumers to wake up to something more compelling than a bell.

Then the Second World War began, putting the brakes on the alarm clock industry’s growth, as nearly all factories in the US and Britain were converted into zones for war-related production. As war workers needed to wake up on time, too, governments allow some alarm clocks to be manufactured.

Metals were scarce at the time, so the U.S. War Production Board requested “that no one buy a war alarm unless it satisfies real need, not merely want, wish, or whim.”

However, as the war dragged on and old alarm clocks began to break, the request for alarm clock became greater so the government allowed factories to re-commence selling alarm clock.

Then enter the snooze botton. This function quickly became popular and exists today as an essential part of alarm clocks.


Now most part of us use the alarm clock of the phone to wake up


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