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Wheatstone Bridge Invention

June 25th Fact-of-the-Day

Ask almost anyone who has studied electricity or electronics who invented the Wheatstone Bridge, an ingenious circuit widely used to accurately measure resistance, and you are apt to be told it was invented by someone named Wheatstone. Actually, it wasn't. Charles Wheatstone acknowledged in a paper he wrote on electrical measurements in 1843 that the circuit was invented by S.H. Christie. It is called a Wheatstone Bridge because Charles Wheatstone invented the rheostat, which is an adjustable resistor that can be used to balance a Wheatstone Bridge, and because he extensively used and popularize the Bridge. Charles Wheatstone invented many other things. He and Sir W. F. Cooke co-invented an electric telegraph that was patented in 1837. He also invented an automatic telegraph transmitter, and electrical recording device, the concertina, and other things. ©2005 Martek International All rights reserved.

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