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The Clapper is a sound-activated electrical switch, sold by San Francisco, California based Joseph Enterprises, Inc. Robert E. Clapper, Sr., and Richard J. Pirong marketed the clapper with the slogan "Clap On! Clap Off! The Clapper!".
The Clapper plugs into a U.S.-type electrical outlet, and allows control of up to two devices plugged into the Clapper. An upgraded model, known as the Clapper Plus, includes a remote control function in addition to the original sound-based activation.
Although meant to activate by clapping, The Clapper can inadvertently be triggered by other noises, such as coughing, a dog barking, a cabinet or door being closed, laughter, yelling, banging, knocking on a door or a wall, other sharp sounds, or noises from televisions and speakers.
The Clapper was invented by Carlile R. Stevens and Dale E. Reamer, and issued U.S. Patent #5493618, which was published on 20 February 1996.
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|"Clap On! Clap Off! The Clapper". ABC News. July 16, 2009.|