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  2. The Clapper - Wikipedia

    en.wikipedia.org/wiki/The_Clapper

    The Clapper is a sound-activated electrical switch, [1] sold since 1984 by San Francisco, California based Joseph Enterprises, Inc. Joseph Pedott marketed the clapper with the slogan "Clap On! Clap Off! The Clapper!". [2] The Clapper plugs into a U.S.-type electrical outlet, and allows control of up to two devices plugged into the Clapper. [3]

  3. Clapper (musical instrument) - Wikipedia

    en.wikipedia.org/wiki/Clapper_(musical_instrument)

    A clapper is a basic form of percussion instrument. It consists of two long solid pieces that are struck together producing sound. They exist in many forms in many different cultures around the world. Clappers can take a number of forms and be made of a wide variety of material. Wood is most common, but metal and ivory have also been used.

  4. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    Quizlet is a multi-national American company that provides tools for studying and learning. [1] Quizlet was founded in October 2005 by Andrew Sutherland, who at the time was a 15-year old student, [ 2 ] and released to the public in January 2007. [ 3 ]

  5. Clapper - Wikipedia

    en.wikipedia.org/wiki/Clapper

    Clapper (musical instrument), consisting of two pieces of wood struck together; Clapper bridge, an ancient form of bridge; Clapper Post, urban postal service in 18th century Vienna; Clapperboard, used in film production to aid synchronizing audio and video and to identify different shots; The Clapper, a sound activated electrical switch

  6. Bell - Wikipedia

    en.wikipedia.org/wiki/Bell

    Larger bells may be swung using electric motors. In some places, such as the Salzburg Cathedral, the clapper is held against the sound bow with an electric clasp as the bell swings up. The clasp would release the clapper to provide a cleaner start to ringing. To silence the bell, the clasp catches and locks the clapper back in place. [14]

  7. Oxford Electric Bell - Wikipedia

    en.wikipedia.org/wiki/Oxford_Electric_Bell

    The bell will eventually stop when the dry piles have distributed their charges equally if the clapper does not wear out first. [5] [6] The Bell has produced approximately 10 billion rings since 1840 and holds the Guinness World Record as "the world's most durable battery [delivering] ceaseless tintinnabulation". [2]

  8. Zill - Wikipedia

    en.wikipedia.org/wiki/Zill

    Clappers are musical instruments made of wood, bone, metal, and other substances that are played by being struck against each other. Clappers come in pairs and are often held in the hands, fastened together, or strapped to the performer's fingers. The clapper family also includes spoons, bones and castanets. [7]

  9. Coherer - Wikipedia

    en.wikipedia.org/wiki/Coherer

    Tesla, for example, invented a coherer in which the tube rotated continually along its axis. In later practical receivers the decoherer was a clapper similar to an electric bell, operated by an electromagnet powered by the coherer current itself. When the radio wave turned on the coherer, the DC current from the battery flowed through the ...

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