So, when the government of France awarded him the Volta Prize for inventing the telephone, he combined this monetary award with the money hye made from selling the patent on another invention to establish the Volta Bureau in Washington, D. C. . Its purpose was to fund research on deafness. Today, it is called the Alexander Graham Bell Association. Its role has been changed to providing the latest information to the deaf of the world on how best to cope with their disability.
At first, two iron wires connected each pair of telephones. Then switchboards brought phone wires into one location. Other inventions - the vacuum tube to amplify sound, and coaxial cables to link long distances on land and under the seas -- greatly expanded phone service. Transistors replaced the old vacuum tubes, and by the 1960s communications satellites eliminated the necessity of landlines. Today, bundles of glass fibers carry calls on laser beams of light.
vacuum tube to amplify sound, and coaxial cables to link long distances on land and under the seas -- greatly expanded phone service. Transistors
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