You searched for: “electromotograph
electromotograph
An early form of a receiver for a telephone, invented by Thomas Alva Edison (1847-1931), an American inventor who patented more than a thousand inventions, among them the microphone (1877), the phonograph (1878), and an incandescent lamp (1879).

In New York City, he installed the world's first central electric power plant (1881-1882).