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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. Westclox - Wikipedia

    en.wikipedia.org/wiki/Westclox

    This movement has a "bell-back" design, meaning that the bell mechanism is integral to the clock's case. The company first brought the Big Ben to market in 1909. The company's name was shortened to "Western Clock Company" in 1912. In 1910, the Big Ben became the first alarm clock advertised nationally, with ads placed in the Saturday Evening Post.

  4. Windows Clock - Wikipedia

    en.wikipedia.org/wiki/Windows_Clock

    Windows Clock (known as Clock & Alarms on Pocket PC 2000, [2] Alarms on Windows 8.1, and, until July 2022, Alarms & Clock on Windows 10) is a time management app for Microsoft Windows, with five key features: alarms, world clocks, timers, a stopwatch, and focus sessions. The features are listed on a sidebar.

  5. File:Windup alarm clock.jpg - Wikipedia

    en.wikipedia.org/wiki/File:Windup_alarm_clock.jpg

    File:Windup alarm clock.jpg. Add languages. Page contents not supported in other languages. File; Talk; ... Download QR code ...

  6. Clockwork - Wikipedia

    en.wikipedia.org/wiki/Clockwork

    Keys of various sizes for winding up mainsprings on clocks Mechanism of a Wall Clock, Ansonia Co. 1904. The stored amounts of energy used by a given piece during its operation is often housed within it; this frequently happens via a winding device that applies mechanical stress to an energy-storage mechanism such as a mainspring, thus involving some form of escapement.

  7. Knocker-up - Wikipedia

    en.wikipedia.org/wiki/Knocker-up

    A knocker-up or knocker-upper was a member of a profession [1] in the Netherlands, Britain, Ireland, and some other countries that started during, and lasted well into, the Industrial Revolution, when alarm clocks were neither cheap nor reliable. A knocker-up's job was to rouse sleeping people so they could get to work on time.

  8. Mainspring - Wikipedia

    en.wikipedia.org/wiki/Mainspring

    In many clocks, the outer end is attached to a stationary post. The spring is wound up by turning the arbor, and after winding its force turns the arbor the other way to run the clock. The disadvantage of this open spring arrangement is that while the mainspring is being wound, its drive force is removed from the clock movement, so the clock ...

  9. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    Some alarm systems serve a single purpose of burglary protection; combination systems provide fire and intrusion protection. Intrusion-alarm systems are combined with closed-circuit television surveillance (CCTV) systems to record intruders' activities and interface to access control systems for electrically locked doors. There are many types ...