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  2. Alarm clock - Wikipedia

    en.wikipedia.org/wiki/Alarm_clock

    This is an accepted version of this page This is the latest accepted revision, reviewed on 23 January 2025. Type of clock A traditional wind-up (key-wound), mechanical spring-powered alarm clock An alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time. The primary function of these clocks is to awaken people from their night's sleep or ...

  3. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    Brahe used clocks with minutes and seconds to observe stellar positions. [112] The pendulum clock outperformed all other kinds of mechanical timekeepers to such an extent that these were usually refitted with a pendulum—a task that could be done without difficulty [127] —so that few verge escapement devices have survived in their original form.

  4. Sony Dream Machine - Wikipedia

    en.wikipedia.org/wiki/Sony_Dream_Machine

    A clock radio that has a different alarm sound and has a volume control and two different alarms. This one comes in the MK2 version as well, It has a red LED display, and for the MK2, it has a green LED display. The first alarm is a radio alarm and the second one is the buzzer, Two bands; FM and AM.

  5. Clocky - Wikipedia

    en.wikipedia.org/wiki/Clocky

    Clocky. Clocky is a brand of alarm clock outfitted with wheels, allowing it to hide itself in order to force the owner awake in an attempt to find it. Invented for an industrial design class by Gauri Nanda, then a graduate student at MIT Media Lab, Clocky won the 2005 Ig Nobel Prize in Economics.

  6. Quartz clock - Wikipedia

    en.wikipedia.org/wiki/Quartz_clock

    Standard-quality 32 768 Hz resonators of this type are warranted to have a long-term accuracy of about six parts per million (0.0006%) at 31 °C (87.8 °F): that is, a typical quartz clock or wristwatch will gain or lose 15 seconds per 30 days (within a normal temperature range of 5 to 35 °C or 41 to 95 °F) or less than a half second clock ...

  7. Telechron - Wikipedia

    en.wikipedia.org/wiki/Telechron

    Telechron electric alarm clock. Telechron alarm clocks are particularly popular with collectors. Until about 1940, the overwhelming majority of Telechron alarm clocks had bell alarms. The entire mechanism was enclosed in a bell housing of steel. Atop the clock's coil was a metal strip that vibrated at 60 cycles per second when the alarm was ...