THOMAS EDISON
“There is no substitute to hard work”
WHAT HE INVENTED
Incandescent Light bulb.
Quadruplex telegraph.
Phonograph Cylinder.
Carbon Microphone.
Movie Camera.
INCANDESCENT LIGHT BULB
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.
QUADRUPLEX TELEGRAPH
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.
PHONOGRAPH CYLINDER
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.
CARBON
MICROPHONE
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.
MOVIE CAMERA
The movie camera, film camera or cinecamera 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.
SOURCES
Wiki
Book Knowledge
Youtube
Television
THANKS FOR WATCHING!!
By Caleb