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  2. Reed switch - Wikipedia

    en.wikipedia.org/wiki/Reed_switch

    The reed switch [i] is an electromechanical switch operated by an applied magnetic field. It was invented in 1922 by professor Valentin Kovalenkov at the Petrograd Electrotechnical University , [ 1 ] and later evolved at Bell Telephone Laboratories in 1936 by Walter B. Ellwood into the reed relay.

  3. Magnetic switchable device - Wikipedia

    en.wikipedia.org/wiki/Magnetic_switchable_device

    A magnetic switchable device (often called a magnetic base) is a magnetic fixture that uses one or more permanent magnets in a configuration that allows the external field to be turned on or off. They are used in many applications including optics , metalworking , lifting , and robotics, to attach items to metal surfaces in a secure but ...

  4. Reed relay - Wikipedia

    en.wikipedia.org/wiki/Reed_relay

    (from top) Single-pole reed switch, four-pole reed switch and single-pole reed relay. Scale in centimeters. A reed relay [i] is a type of relay that uses an electromagnet to control one or more reed switches.

  5. Magnetic starter - Wikipedia

    en.wikipedia.org/wiki/Magnetic_starter

    A magnetic starter has a contactor and an overload relay, which will open the control voltage to the starter coil if it detects an overload on a motor. [1] [2] The overload relay opens a set of contacts that are wired in series with the supply to the contactor feeding the motor.

  6. Lead (electronics) - Wikipedia

    en.wikipedia.org/wiki/Lead_(electronics)

    The lead wire is a coated copper wire, a tinned copper wire or another electrically conductive wire used to connect two locations electrically. In electronics, a lead (/ ˈ l iː d /) or pin is an electrical connector consisting of a length of wire or a metal pad (surface-mount technology) that is designed to connect two locations electrically.

  7. The 3 Most Overpriced Cities in America, According to Gen Z ...

    www.aol.com/finance/3-most-overpriced-cities...

    Here, the median home size for October listings was 1,749 square feet, and the sale price was $712 per square foot. Approximately 29% of 25- to 34-year olds called LA overpriced in the survey.

  8. The best Kohl's Cyber Monday deals to shop before the sale ...

    www.aol.com/lifestyle/the-best-kohls-cyber...

    Get organizers for all of your Christmas decorations on sale now for as low as $10. AOL. This foldable storage shelf is on sale for under $60: 'It is like a magic act' AOL.

  9. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    Reed Switch. The hermetically sealed reed switch is a common type of two-piece sensor. This switch operates with an electrically conductive switch that is either normally open or normally closed when under the influence of a magnetic field in respect to proximity to the second piece, which contains a magnet. When the magnet moves away from the ...

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