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Alexander Graham Bell. Inventor of the Telephone. By Mary Louise Shore. 2005. Alexander Graham Bell. *Born: March 3, 1847 *Parents: Alexander Melville Bell and Elisa Grace Symonds *Siblings: 2 brothers, Melville and Edward. Childhood.

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alexander graham bell

Alexander Graham Bell

Inventor of the Telephone

By Mary Louise Shore

2005

slide2

Alexander Graham Bell

*Born: March 3, 1847

*Parents: Alexander Melville Bell and Elisa Grace Symonds

*Siblings: 2 brothers, Melville and Edward

slide3

Childhood

  • Alexander Graham Bell grew up in Edinburgh, Scotland with his family.
learning from the family
Learning From the Family
  • As 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.

slide5

Hello Grandpa!

When Bell was 13 years old, he spent a year with his grandfather in London. To Graham, this year was the “turning point of his life.”

slide6

Herman von Helmholtz

Bell read books in the library about Herman von Helmholtz, a German scientist who experimented with electrical vibrations to make vowel sounds.

He researched his experiments so that someday he might be able to reconstruct them in his own home.

slide7

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 29

slide8

Tuberculosis-1870

In 1870, Bell’s two brothers died of tuberculosis.

Since Bell was also threatened his family decided to move to a healthier environment, Canada.

slide9

Hello Boston! Good-bye Canada!

After Graham was safe from catching the disease, his job led him to be a physiology professor at Boston University in the United States.

slide10

Boston University

While Bell was in Massachusetts, he invented the harmonic telegraph, an instrument that makes it possible to send multiple telegraphs on one line.

slide11

The Telephone is Patented

On March 7, 1876, Bell recieved his patent for the telephone.

slide12

“Mr.Watson, come here, I want you.”

On March 10, 1876, Alexander Graham Bell was in his testing room with his partner, Watson.

slide13

Reeds

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.

slide14

Successful!

When he did, Graham heard the vibration clearly through the newly invented ‘telephone’.

slide15

The Simple Telephone

There are three parts to the simple telephone. The Speaker, the Microphone and the Switch, also known as the Hook Switch.

slide16

The Hook Switch

The Hook Switch connects and disconnects the phone from the telephone network. The network is connected when you pick up the phone.

slide17

The Speaker

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.

slide18

The Microphone

The microphone has a diaphragm where the sounds waves vibrate the area. The amplifier, a small part of the telephone then sends it through to the other line’s speaker, reinterpreting the sounds into physical vibrations.

slide19

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 the Duplex coil, the keypad and the ringer.

slide20

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.

slide21

The Ringer

The Ringer was also an improvement made from the simple telephone. The ringer is made up of a bell so that you are aware when another line is calling you.

slide22

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 it’s right is the pound key.

slide23

The 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.

slide24

The Telephone Today

Today, phones have been able to get even smaller and even have no cords. In the bottom left, there is 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.

slide25

A Sad day in History

On August 2, 1922, Alexander Graham Bell died at his home in Baddek Nova Scotia.

slide26

Bibliography

---. “Alexander Graham Bell.” Lucid Café. ---.---. April 27, 2005 < http://www.lucidcafe.com/library196mar/bell.htmlL#related >

“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 < http://www.howstuffworks.com/telephone5.htm >

slide27

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.