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  2. Buzzer - Wikipedia

    en.wikipedia.org/wiki/Buzzer

    A buzzer or beeper is an audio signaling device, [1] which may be mechanical, electromechanical, or piezoelectric (piezo for short). Typical uses of buzzers and beepers include alarm devices , timers , train and confirmation of user input such as a mouse click or keystroke.

  3. 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 ...

  4. Doorbell - Wikipedia

    en.wikipedia.org/wiki/Doorbell

    Doorbell mechanism from 1884 in Andrássy Avenue, Budapest Antique mechanically operated shop doorbell on a torsion spring. William Murdoch, a Scottish inventor, installed a number of his own innovations in his house, built in Birmingham in 1817; one of these was a loud doorbell, that worked using a piped system of compressed air. [1]

  5. Faraday (company) - Wikipedia

    en.wikipedia.org/wiki/Faraday_(company)

    Around this time, Faraday began producing notification appliances, such as bells, horns, buzzers, etc. They also rebranded coded fire alarm stations from Holtzer-Cabot . From the 1930s to the 1960s, Faraday was known as " Sperti -Faraday", and the company moved to Adrian, Michigan . [ 1 ]

  6. Crystal radio - Wikipedia

    en.wikipedia.org/wiki/Crystal_radio

    The earliest practical use of crystal radio was to receive Morse code radio signals transmitted from spark-gap transmitters by early amateur radio experimenters. As electronics evolved, the ability to send voice signals by radio caused a technological explosion around 1920 that evolved into today's radio broadcasting industry.

  7. 28 most memorable buzzer beaters in March Madness history - AOL

    www.aol.com/news/2015-03-18-28-most-memorable...

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  8. Electric bell - Wikipedia

    en.wikipedia.org/wiki/Electric_bell

    An electric buzzer uses a similar mechanism to an interrupter bell, but without the resonant bell. They are quieter than bells, but adequate for a warning tone over a small distance, such as across a desktop. A buzzer or beeper is an audio signalling device, which may be mechanical, electromechanical, or piezoelectric.

  9. Watch Steven Adams hit the most casual three-quarter-court ...

    www.aol.com/2020-02-14-watch-steven-adams-hit...

    The Oklahoma City Thunder big man heaved a one-handed, three-quarter court shot to beat the first-half buzzer and put his team up by eight. Watch Steven Adams hit the most casual three-quarter ...