thomas edison
Post on 02-Jan-2016
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Incandescent Light bulb.Quadruplex telegraph.Phonograph Cylinder.Carbon Microphone.
Movie Camera.
WHAT HE INVENTED
The Incandescent Light Bulb was the first ever proper indoor light bulb. This
light bulb used a lot more electricity than the ones we use today. And by
November the 4th he had completed his work of art.
INCANDESCENT LIGHT BULB
The Quadruplex telegraph is a type of electrical telegraph which allows a total of four separate signals to be transmitted and received on a single wire at the same time (two
signals in each direction.) Quadruplex telegraphy thus
implements a form of multiplexing.
QUADRUPLEX TELEGRAPH
Phonograph cylinders are the earliest commercial medium for recording and reproducing sound. Commonly known simply as "records" in their
era of greatest popularity (c. 1896–1915), these hollow cylindrical objects had an audio recording engraved on the outside surface, which could be reproduced when they were
played on a mechanical cylinder phonograph. In the 1910s, the competing disc record system
triumphed in the marketplace to become the dominant commercial audio medium. The
commercial production of cylinders for entertainment use ended in 1929.
PHONOGRAPH CYLINDER
The carbon microphone, also known as carbon button microphone, button
microphone, or carbon transmitter, is a type of microphone, a transducer that converts
sound to an electrical audio signal. It consists of two metal plates separated by granules of
carbon. One plate is very thin and faces outward, acting as a diaphragm. When sound waves strike this plate, the pressure on the granules changes, which in turn changes the
electrical resistance between the plate.
CARBON MICROPHONE
The movie camera, film camera or cine-camera is a type
of photographic camera which takes a rapid sequence of
photographs on strips of film. The video camera has largely
replaced it for private use, but for professional purposes, movie cameras are used and produced
today, especially for the production of full-feature movies.
MOVIE CAMERA
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