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  2. Ten-code - Wikipedia

    en.wikipedia.org/wiki/Ten-code

    Fire, phone alarm Fire alarm Fire 10-71 Proceed with traffic in sequence (busy here). Box alarm Advise nature of fire (size, type, and contents of building) — 10-72 — Second alarm Report progress on fire 10-73 Third alarm Smoke report 10-74 Fourth alarm Negative Negative 10-75 Fifth alarm In contact with — 10-76 Fire equipment needed En ...

  3. 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 ...

  4. 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 ...

  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. Alarm device - Wikipedia

    en.wikipedia.org/wiki/Alarm_device

    an alarm clock that sounds an alarm at a pre-set time, often used to wake a person up or remind them of an event. a fire alarm which is used to give occupants of a building early warning of a potential fire and give them time to evacuate. warning devices on a vehicle that sound when it is moving in an unexpected direction, such as reversing,

  7. Digital clock - Wikipedia

    en.wikipedia.org/wiki/Digital_clock

    Basic digital alarm clock without a radio. The mark in the top-left of the display indicates that the time is 4:00pm (16:00), not 4:00am. A 1969 radio alarm clock (Sony Digimatic 8FC-59W) with an early mechanical-digital display. A digital clock displays the time digitally (i.e. in numerals or other symbols), as opposed to an analogue clock.