who invented the cell Phone

First phone Invented by Graham Bell 

Bell, Alexander Graham (1847-1922), was

a Scottish-born scientist who invented the

telephone. Other inventors had tried to

send speech by wire, but Bell was the

first to succeed.

Bell's upbringing had a great influence

on his career. His father was a success-

ful teacher of deaf-mutes and had invented

a code of symbols called Visible Speech

to help them learn. Bell aided his father

in his work, and also taught speech and

music as a student teacher at a boys

school in Edinburgh.

In 1870 Bell moved with his family to

Ontario, Canada, as he was suffering from

tuberculosis from which both his brothers

had died. He soon recovered, and went to

Boston, Massachusetts, where he set up

a school for teachers of the deaf.

Bell was made a professor at Boston

University, but he still continued with

his electrical experiments. He found

doing all the work by himself rather

difficult, so he enlisted help from a

skilled electrician called Thomas Watson.

Together they proceeded with the ex-

periments. Bell connected up a trans-

mitter, a device which converted sound

waves into electrical waves, to a receiver

which picked up electrical signals and

converted them back to sound. They

finally achieved success in 1875, when

Bell heard a sound made by Watson

coming through the receiver. The first

spoken sentences were heard the follow-

ing year when Bell spoke into the trans-

mitter and was heard by Watson  in a

separate room. The Bell Telephone Com-

pany was founded in 1877, the first of its

kind.

Bell continued to experiment and in-

vent. He helped develop the first gramo-

phone record, and financed flying experi-

ments. The promotion of teaching the

deaf to speak was still one of his chief

concerns. He became an American citizen

in 1882, and died in Novia Scotia.