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History of the telephone △△△ (ILLERMERNERTI) △△△

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Bruce Wayne

on 22 January 2015

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Transcript of History of the telephone △△△ (ILLERMERNERTI) △△△

Bibliography
"A Centenary of Christmas Phone Calls." - IOL SciTech. N.p., n.d. Web. 16 Oct. 2014.

"History of the Atlantic Cable & Submarine Telegraphy - Key West." History of the Atlantic Cable & Submarine Telegraphy - Key West. N.p., n.d. Web. 16 Oct. 2014.

Madrigal, Alexis C. "The First Transcontinental Call Was Made Today in 1915." The Atlantic. Atlantic Media Company, 25 Jan. 2011. Web. 16 Oct. 2014.

"Telephone History." Telephone History. N.p., n.d. Web. 16 Oct. 2014.

"Telephone Timeline - Greatest Engineering Achievements of the Twentieth Century." Telephone Timeline - Greatest Engineering Achievements of the Twentieth Century. N.p., n.d. Web. 16 Oct. 2014.
1901
1904
Rotary dials now have finger holes
SUMSANG
Galactic S3.14
not an iPhone
Finger holes then
1919
Finger holes now
Ergonomics used by AT&T to find out how long the handle of the phone should be by measuring the faces of 4000 citizens
1907
Lee De Forest's 1907 patent of the triode, or three-element vacuum tube

Amplifies signals, allows transcontinental calls
1920
AT&T develops the frequency multiplexing concept, allowing several telephone calls at the same time.
1908
Dial tone was introduced to the public in a German city by the Siemens company, however it was unpopular

Dial tone would later become extremely popular
Rotary dial telephones were mass distributed by The Automatic Electric company
ILLERMERNEhRTI
Daniel Sucks btw
IT WAS ME THAT INVENTED
THE TELEPHONE
AT&T: multiple phone calls? now we can:
HISTORY OF THE TELEPHONE
1900-1920

Measure ear to mouth
For this
length
Who really invented the telephone?
BUT WHO REALLY INVENTED THE TELEPHONE?
Alexander Graham Bell
Full transcript