The Telephone System :: essays research papers

The Teleph iodin SystemThe telephone is one of the most creative and prized inventions in theworld. It has advanced from its humble beginnings to its wireless confabulationtechnology today and for the future. The inhabitants of the earth have longcommunicated over a distance, which has been done by shouting from one hilltopor hover to another. The word "telephone" originated from a combination of cardinalGreek haggling "tele", meaning far off, and "phone", meaning vocalisation or live, andbecame the cognize term for "far- speaking."     A basic telephone usually contains a transmitter, that transfers thecallers voice, and a receiver, that amplifies sound from an incoming call. Inthe transmitter there argon two common kinds of transmitters the carbontransmitter, and the electret transmitter. The carbon transmitter uses carbongranules between metal plates called, electrodes, with one consisting of a thindiaphragm that moves b y pressure from sound waves and transmits them to thecarbon granules. These electrodes conduct electricity flowing through thecarbon. The sound waves move the diaphragm causing the electrical resistance ofthe carbon to vary. The electret transmitter is compose of a thin disk ofmetal-coated plastic held above a thicker, take away metal disk. This plastic diskis electrically charged, and creates an electric field. The sound waves fromthe callers voice cause the plastic disk to vibrate, changing the distancebetween the disks, therefore changing the intensity of the electric field. Thesevariations ar translated into an electric current which travels crosswise thetelephone lines. The receiver of a telephone is composed of a flavorless ring of attractive forceic material. Underneath this magnetic ring is a helix of wire where theelectric current flows. Here, the current and magnetic field from the magnetcause a diaphragm between the two to vibrate, and replicate the sounds that are transformed into electricity.     The telephone is also composed of an alerter and a dial. The alerter,usually cognize as the ringer, alerts a person of a telephone call, created by aspecial frequency of electricity sent by the telephone issue forth typed in. Thedial is the region on the phone where numbers are pushed or dialed. There aretwo types of dialing systems the rotary dial, and the Touch-Tone. The rotarydial is a movable circular plate with the numbers one to nine, and zero. TheTouch-Tone system uses buttons that are pushed, instead of the rotary that sendpulses.     The telephone was said to be invented by many people. However, thefirst to achieve this success, although by accident, was Alexander Graham Bell.He and his associate were planning to conduct an experiment, when Mr.