GK
INVENTIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Thomas Edison
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John Kruesi
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Jules Levy
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Alexander Graham Bell
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Detailed explanation-1: -Kruesi was also involved in many of Edison’s key inventions. Including the quadruplex telegraph, the carbon microphone, phonograph, incandescent light bulb and system of electric lighting. With the development of Edison’s system of electric lighting, Kruesi moved to more management positions.
Detailed explanation-2: -In fact, the phonograph was his favorite invention. The first phonograph was invented in 1877 at the Menlo Park lab. A piece of tin-foil was wrapped around the cylinder in the middle. You shouted a short message into the piece on one side of the cylinder while you turned the handle.
Detailed explanation-3: -In 1877, Thomas Edison invented the phonograph using a combination of the phonautograph, the telegraph and the telephone. His goal was to transcribe messages from the telegraph to a piece of paper tape.