Telephones


 * __Telephones__**

The telephone was invented by a man called Alexander Graham Bell and looked like this,

Sparkmuseum.com Thi s telephone is from 1876 and was called Bell "Centennial" telephone Bells telephone was eligantly simple. He fitted diaphram over an electromagnet and made it work both as a microphone and earpiece. It wasnt really loud enough to be practical at the time, but with modern transistor amplifiers, it is now widley used. The sound vibrated the diaphram, moving the iron and changing the magnetic field around the electromagnet this creates tiny electric currents in the wire.

__ Alexander Graham Bell __ []

Born on March 3rd, 1847, Endinbrurgh, Scotland, UK Died on August 2, 1922 (aged 75) Beinn Bhreagh, Nova Scotia, Canada The telephone was invented for comunication before the phone people used letters which took days to arrive, where as the telephone is instant.

Ron Clarke Don Bennett