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HISTORY OF THE ALARM CLOCK

By paulettelovesenglish
  • 428 BCE

    WATER CLOCK

    owned by the ancient Greek philosopher PLATO
  • 285 BCE

    CLEPSYDRAS

    by the Hellenistic engineer and inventor CTESIBIUS
  • 683

    STRIKING CLOCK

    Devised by the Buddhist monk and inventor YI-XING in China.
  • Period: 1300 to 1400

    CLOCK TOWERS

    in Western Europe, capable of chiming at a fixed time every day. For example, St Mark's clocktowere in Venice.
  • Period: 1400 to 1500

    USER-SETTABLE MECHANICAL ALARM CLOCKS

    in Europe, they had a ring of holesin the clock dial and were set by placing a pin in the appropriate hole.

  • AN ADJUSTABLE MECHANICAL ALARM CLOCK

    by the French inventor Antoine Redier.
  • Period: to

    Computer alarms and mobile phone alarms

    Online alarm clocks are also available through the use of different websites, for example sensorwake.
    The mobile phone doesn't need to be switched on for the alarm to ring off.
  • Period: to

    A CRITICAL SHORTAGE OF ALARM CLOCKS

    due to WWII (they ceased production in the US) + due to older clocks wearing out or breaking down : so workers were late to go to work! As a consequence, several clock companies were allowed to start producing clocks again!

  • THE FIRST RADIO ALARM CLOCK

    invented by James F. Reynolds.

  • NEXT-GENERATION ALARMS

    Alarms clocks involving sleep stage monitoring appeared on the market. These alarm clocks are supposed to wake people only from light sleep.