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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]
The Clapper, whose slogan is "Clap On! Clap Off!", was first sold to the public on September 1, 1985. A trademark was filed on the brand name "Clapper" with the U.S. Patent and Trademark Office on July 9, 1986. [4] A design patent was applied for on November 13, 1985, which was issued as D299127 on December 27, 1988. [5]
The product: The Clapper The price: $24.95 plus $6.95 shipping and handling for a total of $31.98. The claims: It turns up to two plug-in lights or equipment on and off with claps. The Buy-o-meter ...
The History Channel's original logo used from January 1, 1995, to February 15, 2008. In the station's early years, the red background was not there, and later it sometimes appeared blue (in documentaries), light green (in biographies), purple (in sitcoms), yellow (in reality shows), or orange (in short form content) instead of red.
The documentary is accompanied by an 18-minute documentary short called I-Witness to 9/11, which features interviews with nine firsthand eyewitnesses who captured the footage on camera. According to this film, most of the archival footage was in possession of the U.S. government but was not released to History until years after 9/11.
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 ...
Hotel Ground Zero, a 2009 American made-for-television History Channel documentary. I Missed Flight 93, a 2006 American made-for-television History Channel documentary about people who missed United Airlines Flight 93. Inside 9/11, a 2005 American made-for-television National Geographic Channel documentary about the events before, during, and ...
[11] [15] This low melting point proved to be the nemesis of Russia's third attempt at casting the Tsar Bell from 1733 to 1735. [11] The bell was never rung, and a huge slab cracked off (11.5 tons) during a fire in the Kremlin in 1737 before it could ever be raised from its casting pit. Burning timber fell into the casting pit, and the decision ...