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Topic: American Telephone and Telegraph


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  Telephone - Encyclopedia.WorldSearch   (Site not responding. Last check: 2007-10-20)
The early history of the telephone is a confusing morass of claim and counterclaim, which was not clarified by the huge mass of lawsuits which hoped to resolve the patent claims of individuals.
The lover's telephone (or string telephone) has also been known for centuries, connecting two diaphragms with string or wire which transmits the sound from one to the other by vibrations along the string and not through electric current.
The primitive telephone was rapidly improved, the double electromagnet being replaced by a single bar magnet having a small coil or bobbin of fine wire surrounding one pole, in front of which a thin disc of ferrotype is fixed in a circular mouthpiece, and serves as a combined membrane and armature.
encyclopedia.worldsearch.com /telephone.htm   (3535 words)

  
 AT&T - Wikipedia, the free encyclopedia
The formation of the Bell Telephone Company superceded an agreement between Alexander Graham Bell and his financiers, principal among them Gardiner G. Hubbard and Thomas Sanders.
Bell's patent on the telephone expired in 1894, but the company's much larger customer base made its service much more valuable than alternatives and substantial growth continued.
On December 30, 1899, the American Telephone and Telegraph Corporation bought the assets of American Bell--this was because Massachusetts corporate laws were very restrictive and limited capitalization to ten million dollars, forestalling the growth of American Bell itself.
en.wikipedia.org /wiki/AT&T   (2005 words)

  
 Telephone Encyclopedia Article, Definition, History, Biography   (Site not responding. Last check: 2007-10-20)
Most telephones operate by means of electric signals over a complex public switched telephone network of equipment which allows almost any phone user to speak to almost any other.
There are four principal means by which telephone signals are transmitted: through a traditional landline which uses physical dedicated wire connections; wireless or Radiotelephony, which transmits messages using either analog or digital radio signals; satellite telephones which bounce signals off of telecommunications satelites; and voice over internet protocol (VOIP) telephones, which use broadband internet cables.
The very early history of the telephone is a confusing morass of claim and counterclaim, which was not clarified by the huge mass of lawsuits which hoped to resolve the patent claims of individuals.
www.alienartifacts.com /encyclopedia/Telephone   (1663 words)

  
 PrepaidWirelessPhonesNow.com   (Site not responding. Last check: 2007-10-20)
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