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  2. Electric bell - Wikipedia

    en.wikipedia.org/wiki/Electric_bell

    An electric bell is a mechanical or electronic bell that functions by means of an electromagnet. When an electric current is applied, it produces a repetitive buzzing, clanging or ringing sound.

  3. Electromagnet - Wikipedia

    en.wikipedia.org/wiki/Electromagnet

    A portative electromagnet is one designed to just hold material in place; an example is a lifting magnet. A tractive electromagnet applies a force and moves something. [8] Electromagnets are very widely used in electric and electromechanical devices, including: Motors and generators; Transformers; Relays; Electric bells and buzzers ...

  4. Oxford Electric Bell - Wikipedia

    en.wikipedia.org/wiki/Oxford_Electric_Bell

    The Oxford Electric Bell or Clarendon Dry Pile is an experimental electric bell, in particular a type of bell that uses the electrostatic clock principle that was set up in 1840 and which has run nearly continuously ever since. It was one of the first pieces purchased for a collection of apparatus by clergyman and physicist Robert Walker.

  5. Joseph Henry - Wikipedia

    en.wikipedia.org/wiki/Joseph_Henry

    He invented a precursor to the electric doorbell (specifically a bell that could be rung at a distance via an electric wire, 1831) [7] and electric relay (1835). [8] His work on the electromagnetic relay was the basis of the practical electrical telegraph , invented separately by Samuel F. B. Morse and Sir Charles Wheatstone .

  6. Franklin bells - Wikipedia

    en.wikipedia.org/wiki/Franklin_bells

    The system of operation of the Franklin clock considers that the electrostatic force generated by an electric field is used to move the pendulums that strike two metal bells. [9] [10] The Franklin bells uses a metal rod as a lightning rod to attract current. One bell is connected to the lightning rod and the other bell is connected to the ground.

  7. US manufacturing contraction slows in November, outlook uncertain

    www.aol.com/news/us-manufacturing-improves...

    WASHINGTON (Reuters) -U.S. manufacturing contracted at a moderate pace in November, with orders growing for the first time in eight months and factories facing significantly lower prices for inputs.

  8. Bell box - Wikipedia

    en.wikipedia.org/wiki/Bell_box

    The housing of the bell box may be manufactured from wood, metal, or plastic. The basic core component of a conventional bell box is an electromagnet and a bell or other metal piece, some of which create a repetitive sound. [1] The bell sound is normally created inside the box, although the unit may have bells mounted on the outside of the box.

  9. The jobs most vulnerable under the next Trump administration

    www.aol.com/finance/jobs-most-vulnerable-under...

    For instance, last month, the Department of Energy announced a $6.6 billion conditional loan commitment to Rivian, an electric vehicle startup that is a nascent competitor to Tesla, Musk’s $1 ...

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