Chemical Telephone

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An illustration of one of the early telephones, known as a chemical telephone. Some used a liquid transmitter, some had a metal diaphragm that induced current in an electromagnet wound around a permanent magnet, and some were “dynamic” - their diaphragm vibrated a coil of wire in the field of a permanent magnet or the coil vibrated the diaphragm.

Keywords

crank, phone, early, chemical telephone

Galleries

Telephone and Telegraph Industry

Source

J. G. Holland, ed. Scribner's Monthly, An illustrated Magazine For the People (New York, NY: Scribner and Company, 1876)

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