Keywords: Alexander,Graham,Bell,Alexander Graham Bell,Telephone Invented,Telephone,10 March,1876,Thomas A. Edison,United States,First Telephone Invented,Queen,Victoria,Phone,
Alexander Graham Bell inventor of Telephone was born in 1847 and died in 1922.
In 1874 He said,
" If I could make a current of electricity vary in intensity precisely as the air varies in density during the production of sound, I should be able to transmit speech telegraphically". This is the principle of the telephone.
Alexander Graham Bell invented and patented in 1876 the first telephone that was of any real practical use.
On March 10, 1876, the first historic message was telephoned to Thomas A. Watson, Bell's assistant, who was in another room: " Mr Watson, come here; I want you."
Bell's first machine gave electrical currents too feeble to be of much use for the general public.
In 1877 the American scientist Thomas A. Edison (1847-1931) invented the variable-contact carbon tranmitter, which greatly increased the power of the signals.
The telephone was immediately popular in the United States, but Bell found little interest in Britain when he visited the country in 1878. Then Queen Victoria asked for a pair of telephones and the royal interest resulted in a London telephone exchange being formed in 1879 with eight subscribers.
Keywords: Alexander,Graham,Bell,Alexander Graham Bell,Telephone Invented,Telephone,10 March,1876,Thomas A. Edison,United States,First Telephone Invented,Queen,Victoria,Phone,
Alexander Graham Bell inventor of Telephone was born in 1847 and died in 1922.
In 1874 He said,
" If I could make a current of electricity vary in intensity precisely as the air varies in density during the production of sound, I should be able to transmit speech telegraphically". This is the principle of the telephone.
Alexander Graham Bell invented and patented in 1876 the first telephone that was of any real practical use.
On March 10, 1876, the first historic message was telephoned to Thomas A. Watson, Bell's assistant, who was in another room: " Mr Watson, come here; I want you."
Bell's first machine gave electrical currents too feeble to be of much use for the general public.
In 1877 the American scientist Thomas A. Edison (1847-1931) invented the variable-contact carbon tranmitter, which greatly increased the power of the signals.
The telephone was immediately popular in the United States, but Bell found little interest in Britain when he visited the country in 1878. Then Queen Victoria asked for a pair of telephones and the royal interest resulted in a London telephone exchange being formed in 1879 with eight subscribers.
Keywords: Alexander,Graham,Bell,Alexander Graham Bell,Telephone Invented,Telephone,10 March,1876,Thomas A. Edison,United States,First Telephone Invented,Queen,Victoria,Phone,
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