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The Telephone
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Acoustic String Telephone
Robert Hooke creates an acoustic string telephone that conveys sounds over a taut extended wire by mechanical vibrations. A tin can telephone is a type of acoustic (non-electrical) speech-transmitting device made up of two tin cans, paper cups or similarly shaped items attached to either end of a taut string or wire. -
Electromagnetic Telephone
Antonio Meucci invented the electromagnetic telephone in 1849. Made with a magnet to get a farther distance and better quality. -
Acoustic Telegraphy
Thomas Edison reinvented the telephone to work across farther distances. -
Telephone Switchboard
Almon Strowger in 1888 invented the switchboard telphone. Phone calls had better quality and distance. People would pick up the phone and call into the switchboard workers and then the workers would transfer the call to the house wanted. -
Point-Contact Transistor
Bell's lab research on semiconductor replacements for unreliable vacuum tubes and electromechanical switches then used in the Bell Telephone System.
