Telegraph

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Telegraph

  1. 1. How do you send message with an Electromagnet?
  2. 2.  pushing down the telegraph key completes the electrical circuit from the key to one end of the coil and from the other end of the coil to one end of the battery and from the other terminal of the battery back to the other side of the key. Now the sounder magnet should pull down the metal strip and make a CLICKING sound. When you release the key, the metal strip should spring upwards and make a CLACKING sound.
  3. 3.  the difference between the dots and the dashes of the Morse code by learning to tell the difference between the pull-in "CLICK" and the release- "CLACK".  The pull-in "CLICK" is the sound the metal strip makes when it is pulled in by the electromagnet coil and strikes the nail which is in the center of the coil.  The release "CLACK" is the sound that the metal strip makes when it is no longer pulled by the electromagnet coil and it moves rapidly upward to strike the upper nail.  The Morse Code Characters are called DOTS (or 'dits') and DASHES (or 'dahs') They are made from the CLICKS and CLACKS

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