|
Alexander Graham Bell
(The Great American Inventor)
by: Jason Petz 1/24/00
Alexander Graham Bell was an American inventor and educator, an he is
best known for his invention of the telephone. Bell's family and
education deeply influenced his career. he was born n March 3,
1847, in Edinburgh, Scotland. His father, Alexander Melville
Bell, taught deaf people to speak and he also wrote textbooks on
speech. Graham Bell was a talented musician. He played by
ear from infancy and received a musical education. Bell enrolled
as a student and teacher at Weston House, a boy's school, where he
taught music and speech in exchange for instruction in other
studies. He became a full-time teacher after studying for a year
at the University of Edinburgh. He also studied at the
University of London and he used Visible Speech to teach a class of
deaf children.
In 1866, Alexander Graham Bell carried out a
series of experiments to determine how vowel sounds are made. he
read a book on acoustics by the German physicist, Herman Von
Helmholtz, which described experiments in combining the notes of
electrical tuning forks to make vowel sounds. This gave Bell the
idea of telegraphing speech, but he still had no idea of how to do
it. This is when Bell's interest in electricity started.
In 1870, disaster uprooted the Bell
family. Graham's younger brother had died of tuberculosis, and
his older brother died from the same disease. Fearing that
Graham's health was in jeopardy, his father sacrificed his job in
London and moved the family to Brantford Ontario, Canada, where he
thought the climate might be healthier.
In 1872, Bell opened a school for teachers of
the deaf in Boston. The following year, he became a professor in
Boston University. Bell's instruction in Visible Speech won him
many friends in Boston. One of these friends was the Boston
attorney, Gardiner Green Hubbard. Hubbard was an outspoken
critic of Western Union Telegraph Co. When he learned that Bell
had been secretly working on improvements to the telegraph, Hubbard
immediately offered him financial backing in the hope of outdoing
Western Union. When Bell first began his experiments (in 1872)
he did not attempt to transmit speech, electronically. Instead,
he tried to send more than on telegraph message over one wire at the
same time, which was an important need of the telegraph
industry. In 1874, Bell developed the idea for the
telephone. Bell continued his telegraphy experiments, but he
always had the telephone on his mind.
Bell soon found out that he lacked the time
and skill to make the parts for his experiments. Hubbard
insisted that he go to an electrical instrument making shop for
help. There, Thomas A. Watson began to assist Bell. During
the experiments that followed, Bell said it would be possible to pick
up the human voice on the harmonic telegragh he had developed for
sending two or more messages. Then on July2, 1875, while Bell
was at one end of the line and Watson worked on the reeds of the
telegraph in another room, Bell heard the sound of a plucked reed
coming to him over the wire. He was very excited to discover
that his experiment was working.
After an hour or so of plucking reeds and
listening to the sounds, Bell gave his assistant instructions for
making a pair of improved instruments. These new instruments
transmitted recognizable voice sounds, not words. Bell and
Watson experimented all summer, and in September 1875, Bell began to
write the specifications for his first telephone patent.
Bell demonstrated his telephones at the
Centennial Exposition in Philadelphia in June 1876. Bell's
instruments impressed one of the judges, the Emperor Dom Pedro of
Brazil. The British scientist Sir William Thompson called the
telephone "The most wonderful thing in America!"
Bell and Watson gave many successful
demonstrations of the telephone, and their work paved the way for
commercial telephone service in the United States of America.
The first telephone service, the Bell Telephone Company, came into
existence in July 9, 1877. Two days later, Bell married Mable
Hubbard, and they returned home in 1878, and moved to Washington,
D.C. Bell didn't take an active part in the telephone business.
|