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1、Alexander Graham BellInventor of the TelephoneBy Mary Louise Shore20051青苗辅导*Born: March 3, 1847*Parents: Alexander Melville Bell and Elisa Grace Symonds*Siblings: 2 brothers, Melville and EdwardAlexander Graham Bell2青苗辅导4Alexander Graham Bell grew up in Edinburgh, Scotland with his family.Childhood3
2、青苗辅导Learning From the Family4As a child, Bell inherited a musical talent from his mother, who was a musician and also a portrait painter.He was taught by his grandfather and father about public speaking.4青苗辅导Hello Grandpa! When Bell was 13 years old, he spent a year with his grandfather in London. T
3、o Graham, this year was the “turning point of his life.”5青苗辅导 Bell read books in the library about Herman von Helmholtz, a German scientist who experimented with electrical vibrations to make vowel sounds. Herman von Helmholtz He researched his experiments so that someday he might be able to reconst
4、ruct them in his own home. 6青苗辅导Early Life At the Age of 16, Graham began to teach music and speech at a boys school. Years later, Bell started teaching his fathers visual speech to deaf and hearing impaired children.Bell at age 297青苗辅导Tuberculosis-1870 In 1870, Bells two brothers died of tuberculos
5、is. Since Bell was also threatened his family decided to move to a healthier environment, Canada. 8青苗辅导 After Graham was safe from catching the disease, his job led him to be a physiology professor at Boston University in the United States.Hello Boston! Good-bye Canada!9青苗辅导 While Bell was in Massac
6、husetts, he invented the harmonic telegraph, an instrument that makes it possible to send multiple telegraphs on one line.Boston University10青苗辅导 On March 7, 1876, Bell recieved his patent for the telephone.The Telephone is Patented11青苗辅导“Mr.Watson, come here, I want you.” On March 10, 1876, Alexand
7、er Graham Bell was in his testing room with his partner, Watson. 12青苗辅导 The experiment they were working with had reeds that were thin and steel. One of the reeds was stuck so Watson plucked it to try to fix it.Reeds13青苗辅导 When he did, Graham heard the vibration clearly through the newly invented te
8、lephone. Successful!14青苗辅导 The Simple Telephone There are three parts to the simple telephone. The Speaker, the Microphone and the Switch, also known as the Hook Switch. 15青苗辅导The Hook Switch The Hook Switch connects and disconnects the phone from the telephone network. The network is connected when
9、 you pick up the phone.16青苗辅导 The speaker picks up the sounds waves from the other line, and sends them through the network to your ear drums. The sounds vibrate in your ear, and you then have sound.The Speaker17青苗辅导The Microphone The microphone has a diaphragm where the sounds waves vibrate the are
10、a. The amplifier, a small part of the telephone then sends it through to the other lines speaker, reinterpreting the sounds into physical vibrations. 18青苗辅导A More Modernized Telephone To make up the real telephone there are the 3 major parts, like the simple phone, and 3 more new parts,these include
11、 the Duplex coil, the keypad and the ringer.19青苗辅导The Duplex Coil In the simple phone, you can hear yourself through the speaker when you talk. The Duplex coil is a device that enables you to speak into the microphone without hearing your voice. 20青苗辅导The RingerThe Ringer was also an improvement mad
12、e from the simple telephone. The ringer is made up of a bell so that you are aware when another line is calling you.21青苗辅导Keypad The touch tone keypad consists of twelve buttons. It has the digits 1-9, and zero. To the left of the zero is the star key. Located on its right is the pound key. 22青苗辅导Th
13、e Telephone The telephone may seem like a complicated machine, but it really is one of the simplest devices that you may find in your home, or anywhere else you can imagine. 23青苗辅导The Telephone TodayToday, phones have been able to get even smaller and even have no cords. In the bottom left, there is
14、 a palm pilot that can also be used at a phone. The telephone is a unique piece of equipment. No one can imagine our world without it. 24青苗辅导A Sad day in History On August 2, 1922, Alexander Graham Bell died at his home in Baddek Nova Scotia. 25青苗辅导Bibliography-. “Alexander Graham Bell.” Lucid Caf.
15、-.-. April 27, 2005 “Bell, Alexander Graham.” The New Book of Knowledge. B, 2000 edition“Bell, Alexander Graham.” Academic American Encycopedia. B 1991-. “Telephone.” How Stuff Works. -.-. April 30, 2005 26青苗辅导About Me! My name is Mary Louise Shore and I love to travel, play volleyball, watch Ncstate basketball and smile! I love skittles and oreos.27青苗辅导
