Watson, an experienced electrical designer and mechanic, changed all that.īell hired Thomas Watson as his assistant, and the two of them experimented with acoustic telegraphy. However, a chance meeting that year between Bell and Thomas A. But he had no working model to demonstrate the feasibility of these ideas. He thought that multiple metal reeds tuned to different frequencies would convert the undulating currents back into sound. Inventing the Telephoneīy 1874, Alexander Graham Bell thought it might be possible to generate electrical currents that corresponded to sound waves. At the receiver, fluctuating current in the electromagnets causes the diaphragm to move, producing vibrations that can be heard.
This current was conducted over wires to a similar instrument, acting as a receiver. When used as a transmitter, sound waves at the mouthpiece cause the diaphragm to move, creating a fluctuating current in the electromagnets. Both transmitter and receiver were similar. Alexander Graham Bell produced two telephones for a demonstration between Boston and Salem, Massachusetts, in 1876.īell’s first telephone included an iron diaphragm, two electromagnets, and a horseshoe permanent magnet pressed against the electromagnets. Alexander Graham Bell’s Large Box telephone was one of the first available telephones in 1876.
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