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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. Standards for Alarm Systems, Installation, and Monitoring

    en.wikipedia.org/wiki/Standards_for_Alarm...

    The Underwriters Laboratories' UL 365 is a safety standard that governs the construction, performance, and maintenance of police station-connected burglar alarm units and systems. These systems are designed primarily for use in mercantile premises, including mercantile safes and vaults, as well as bank safes and vaults.

  4. Faraday (company) - Wikipedia

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

    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 ] From the late 1960s up until present, many companies rebranded Faraday's popular line of notification appliances, including Simplex , Standard Electric Time ...

  5. Camping World - Wikipedia

    en.wikipedia.org/wiki/Camping_World

    Camping World in Belleville, Michigan. Under the Freedom Roads brand, the company sells RVs through a network of about three dozen independent dealers. [9] In 2007, the company opened the Camping World RV Sales dealership; formerly known as Stout's RV. It is located on Interstate 65 south of Indianapolis, Indiana.

  6. 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.

  7. 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 ...

  8. Federal Signal Modulator - Wikipedia

    en.wikipedia.org/wiki/Federal_Signal_Modulator

    The Concrete, Washington area has a system of eight 8032B Modulators to warn of possible breaches at the Baker River Dam. The system uses a distinctive "WHOOP" tone that was originally produced for Federal Signal's line of fire alarms. The system is tested on the second Monday of every month at 6:00pm. [6]

  9. Vibrator (electronic) - Wikipedia

    en.wikipedia.org/wiki/Vibrator_(electronic)

    A vibrator was used to provide pulsating DC which could be converted to a higher voltage with a transformer, rectified, and filtered to create higher-voltage DC. It is essentially a relay using normally closed contacts to supply power to the relay coil, thus immediately breaking the connection, only to be reconnected very quickly through the ...

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