Invention of Telephone and Development
Invention of Telephone and Development
Invention of the phone (1876 ):
Scottish-born Alexander Graham Bell speaking educators on March 7, 1876 the first telephone was invented and received a patent . Deaf studies related to vibration in the air with the sounds of Bella wondered how that had led him to . " Harmonic telegraph" his name while working on a mechanism of electric current to resemble the vibration caused during a conversation I had found could have been changed . According to this principle invented the telephone was not working.
1876:
Alexander Graham Bell and his assistant Watson made the first long distance telephone call . 3 km the distance between them . respectively.
All -in-One:
In Bell's invention of the telephone device , resembling a trumpet mouthpiece was in one headset . When you talk to a person, the mouthpiece of the sound vibrates a diaphragm inside the device , subject to change vibration was transformed into an electric current . Buyer , from the opposite side of the stream , as a voice to be heard again by turning the vibration was getting .
Wires:
The first telephone cables using copper wire was covered with glass . In particular, the overhead lines because they are sturdy iron wires would be preferred .
1877 Bell's invention not see Reputation:
Professor Bell received a patent for the invention western- from Union telegram from the phone company offered to sell 100 thousand dollars . However, the company that " are useless ridiculous idea " come to the decision rejected the proposal . On top of that capital Bella who supported him in 1880 with the union of two partners founded the Bell Telephone Company
1877:
Thomas Edison in 1877, which is part of two separate phone for listening and speaking has developed tools .
1878:
The first telephone directory was published in the New Heaven . Guide to the subscriber's name and number 21 was written .
1885:
Now the transmitter and the receiver " receiver "
Invention of the phone (1876 ):
Scottish-born Alexander Graham Bell speaking educators on March 7, 1876 the first telephone was invented and received a patent . Deaf studies related to vibration in the air with the sounds of Bella wondered how that had led him to . " Harmonic telegraph" his name while working on a mechanism of electric current to resemble the vibration caused during a conversation I had found could have been changed . According to this principle invented the telephone was not working.
1876:
Alexander Graham Bell and his assistant Watson made the first long distance telephone call . 3 km the distance between them . respectively.
All -in-One:
In Bell's invention of the telephone device , resembling a trumpet mouthpiece was in one headset . When you talk to a person, the mouthpiece of the sound vibrates a diaphragm inside the device , subject to change vibration was transformed into an electric current . Buyer , from the opposite side of the stream , as a voice to be heard again by turning the vibration was getting .
Wires:
The first telephone cables using copper wire was covered with glass . In particular, the overhead lines because they are sturdy iron wires would be preferred .
1877 Bell's invention not see Reputation:
Professor Bell received a patent for the invention western- from Union telegram from the phone company offered to sell 100 thousand dollars . However, the company that " are useless ridiculous idea " come to the decision rejected the proposal . On top of that capital Bella who supported him in 1880 with the union of two partners founded the Bell Telephone Company
1877:
Thomas Edison in 1877, which is part of two separate phone for listening and speaking has developed tools .
1878:
The first telephone directory was published in the New Heaven . Guide to the subscriber's name and number 21 was written .
1885:
Now the transmitter and the receiver " receiver "