Reis telephone, 19th century

Reis telephone, 19th century

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Caption: Reis telephone, engraving. This rudimentary telephone by the German inventor Johann Philipp Reis (1834-1874) was first built in 1860 and was based on the principle of magnetostriction. Wire coiled around iron cores and needles caused contraction when a current flowed, producing an audible click in a resonator. However, the sounds were faint, and there was little interest in the invention. The practical development of the telephone was achieved by others, such as Alexander Graham Bell.

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Keywords: 1800s, 1860, 19th century, artwork, black-and-white, coiled, communication, communications, device, diagram, early, electric, electrical, equipment, european, german, historical, history, illustration, machine, magnetostriction, monochrome, physical, physics, pioneering, primitive telephone, reis telephone, rudimentary, speaking tube, technological, technology, telecommunication, telecommunications, telephone, wires

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