The Invention of the Telephone and How It Has Changed Over the Years Es

The Invention of the Telephone and How It Has Changed Over the Years About 100 years ago, horse parsley Graham Bell invented the telephone byaccident with his assistant Mr. Watson. Over m whatsoever years, the modern version ofthe telephone makes the one that Bell invented look interchangeable a piece of junk.Developments in tone dialing, call tracing, music on h experient, and electronicringers have greatly changed the telephone. This marvelous invention allows us to communicate with the undefiled globe24 hours a day just by punching in a simple telephone number. It is the mostused piece of electronic instrument in the world. It is probably one of the mosteasy to use electronics available too. All you have to do is pick up the pass receiver, listen for the tone, and hence need a number using either tone orpulsing dial. A telephone smoke be separated into two main categories at that place is the tone(touch tone) or the older rotary dial (pulse) telephones. Then you can dividethose into other categories such as business line (multi -- line) or space line(single line). You can also have many other types of phones there are thosethat hang on the wall, on the desk, etc.THE HANDSET No event what kind of telephone you own, there has to be some devicethat allows you to talk to and listen to. This device is called the handset. Thehandset is usually made out of plastic and deep down it are two main componentsthe transmitter and the receiver.THE TRANSMITTER It is the job of the transmitter to turn the air pressure created byyour sound waves to electrical signals so they can be sent to the othertelephone. The waves hit a thin skin called the diaphragm that is physicallyconnected to a reservoir of carbon granules. When the pressure hits thediaphragm, it shakes up the carbon granules. Then the carbon expands andcontracts, depending on what force is exerted. At two points on the outer shellof the reservoir of the carbon are two outlets of electr ical energy from the talkbattery. By applying voltage, a current is made and is passed along the lines tothe waiting telephone. At the other end the current is transformed back tospeech.THE RECEIVER The receiver turns an ever varying current back to speech. A permanentlymagnetized soft iron core is covered in many turns of very comely wire. Throughthe wire, the electrical c... ...ed back to the number.TELEPHONE CORDS Older telephone lines were made of fork shaped piece of metal attachedto wires with a instrumental role called the crimper. When installed, these wires werescrewed into the terminal box on the wall. This is really a pain in the rear endbecause if you are going to fix the phone, you have to unscrew the box, then allthe screws. This process could last for hours at a time. To make this job a lot easier, coiled cords and modular lines wereinvented. To take out the handset or telephone, all you have to do is to unplugthe modular connector from its match and th at is it. Modular cords can be boughtnearly in any electronics store. There are three kinds of cords. One is the full modular cord. There aresmall modular clips on both ends of the cord. The second is the one mentioned inthe first paragraph, this is called the spade -- lug cord. The third one iscalled the 1/4 modular, this cord has one modular connector on one side and theold fashioned spade -- lug end on the other. These 1/4 cords are not very common.BIBLIOGRAPHYBOOK THE TALKING TELEPHONE occasion STEVE SOKOLOWSKI PUBLISHER TAB BOOKS NOV.1991