The invention of the telephone
Charles Bourseul, then used the telegraph administration stated in an article in "The Picture" of 08.26.1854 which will be in fact the principle of the phone without going to completion.
Philipp Reis
Phone REIS
In 1860, a German schoolteacher Philip Reiss makes a device capable of transmitting musical sounds by electricity.
He managed to market his "phone" but the quality of his equipment is still inadequate and does not transmit speech.
Reiss, however, pass very close to what will be the real phone.
P. Reiss's invention is made in the U.S
Alexander Graham Bell
The caveat GRAY
February 14, 1876
February 14, 1876
Issuer BELL liquid
March 10, 1876
March 10, 1876
It was not until March 10, 1876 for Bell manages to convey a famously "Mr. Watson, please come into my office, please";
Then in June 1876, so that one sees for the first time a phone to operate at the state fair in Philadelphia.
The phone in 1877 between the United States in its commercial phase following the establishment of the Bell Telephone Company.
Thomas A. Edison in 1880
In 1877 also, the Western Union Telegraph asks Thomas A. Edison to develop another product to counter the Bell Company. Edison's share of the apparatus of Reiss and his work resulted in the development of a transmitter with variable resistance is more sensitive than that of Bell, which will become the first microphone graphite April 27, 1877.
Final device BELL
Two American, Alexander Graham Bell and Elisha Gray will lead to the achievement of telephones.
The first developed several prototypes of transmitters and sound in 1875 is developing a sophisticated system of telegraph.
The second works in the same area and 14 February 1876, the two men filed a patent for invention of the telephone.
History will the name of Bell, because after legal battle, the paternity of the phone is awarded to it by the patent No. 174465 of March 7, 1876.
However, none of the two devices do not work
A few weeks later, Bell brings its July 9, 1877 Hand Phone reversible.
;
David Hughes
The microphone of Hughes
In May 1878, David Hughes invents the microphone formed of cylindrical carbon rods.
In France, three telephone companies with concessions, created in 1878 merged: the General
Telephone Booth around 1891
The state develops its network in 1885 by creating the first online network linking the important city of Reims in the palace of the Paris stock exchange, equipped with telephone booths.
It builds and operates 16 networks directly and intercity, against 11 for the GTS
It builds and operates 16 networks directly and intercity, against 11 for the GTS
.1st September 1889
On 1 September 1889, the state resumed full operation of all networks, which will give the French telephone monopoly.
Central Gutenberg Cup in 1893
A telephone operator in 1900
..Late 1877, the American Frederick Gower improves the device and its Bell system was installed in Paris in 1879.
This was the first telephone French.
However, the system Gower, inefficient, was quickly abandoned.
