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THE HISTORY OF THE TELEPHONE. BY: DAVID OWENS. THE BEGINNING OF THE TELEPHONE. In 1876 Alexander Graham Bell invented the telephone with the help of his assistant Thomas A. Watson Telephone is the Greek word for sound
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THE HISTORY OF THE TELEPHONE BY: DAVID OWENS
THE BEGINNING OF THE TELEPHONE • In 1876 Alexander Graham Bell invented the telephone with the help of his assistant Thomas A. Watson • Telephone is the Greek word for sound • Mr. Bell got the idea for the telephone from a German inventor Hermann von Helmholz • Mr. Bell invented the telephone by accident when he was trying to invent a device that could send more than one telegram at a the same time. • The first telephone didn’t have a bell, so the caller had to tap the phone with a hammer to let the receiver know a call was being sent to them. • Thomas Watson invented the bell for the telephone.
The Phone Operator • The first telephone operator only answered the phone when they felt like it. • The operator would pick up the phone and say number please. • If the number wasn’t busy the operator took a chord and plugged it into a switchboard that connects the caller to the number. • The operator system changed because there were to many people with telephones and it cost to much money to have that many operators working.
WHAT IS THE TELEPHONE • A modern telephone transmitter which is essentially a carbon microphone contains loosely packed carbon grains. • When someone speaks into the telephone the diaphragm vibrates causing the carbon grains to be compressed and released. • This motion varies the current flow in the associated electric circuit. • When transmitted to a distant identical instrument causes the diaphragm in it to vibrate in response to the fluctuations induced by the nearby field.
HOW TELEPHONES ARE MADE • The first simple telephone were comprised of a long string and two cans were known to be in the 18th century. • A electrical voice transmission system was first demonstrated by Johann Philipp Reis in 1863. • His machine consisted of a vibrating membrane that opened or closed an electric circuit.
WHAT IS THE TELEPHONE USED FOR • The telephone is used for communicate with friends and family • The telephone is a way to express your self • The telephone is a way to get information • The telephone is used for home or to take with you anywhere
WHAT CAN THE TELEPHONE TELL • The telephone can tell the time and date • The telephone can tell if you have a missed call or a incoming call • The telephone can tell what time people called • The telephone can tell how loud it is how much light it has and how much battery is left
HOW DID TELEPHONES GET BETTER OVERTIME • The 1st automatic telephone was made in 1891 in Kansas city. • In 1921 the Detroit police department began experimenting with one-way vehicular telephones. • In 1948 wireless telephone service was available in almost 100 cities and highway corridors. • In 1970 picture phone service debuted in downtown Pittsburgh Pennsylvania. • In 1973 martin Cooper of Motorola made the 1st cell phone call to his rival at AT&T.
Bibliography • www.one box.com Eiisha Gray • www.student project.ocm Hong Kaing Ryan Pryke • www.totally wired.com Clayton • www.ideafinder.com/history/inventions/telephone.htm Phil Ament