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The evolution of the telephone
The telegraph and telephone are both wire-based electrical systems, and Alexander Graham Bell's success with the telephone came as a direct result of his attempts to improve the telegraph. -
Materials used to make the telephone
black circular disc mounted on the vertical wooden support,two electromagnets,white, facing the diaphragm,and a horseshoe permanent magnet,(lying horizontal, pressed against the electromagnets). -
the inventors of the telephone
Elisha Gray and Alexander Graham Bell -
how was the telephone originally made
ell's interest in telephony was primarily derived from his background in vocal physiology and his speech instruction to the deaf. His breakthrough experiment occurred on June 2, 1875. He and his assistant, Thomas Watson, were working on a harmonic telegraph. When a reed stuck on Watson's transmitter an intermittent current was converted to a continuous current. Bell was able to hear the sound on his receiver confirming his belief that sound could be transmitted and reconverted through an electri
