Morse's telegraph. Historical artwork of the transmitter of a telegraph machine used to send Morse code. The operator tapped out the code on the button at upper left. Morse code represents each letter and number by a series of dots and dashes. By holding down the button for varying lengths of time,a short or long electrical signal was sent down the wire. A receiver at the end of the wire then converted these signals into a print-out of dots and dashes,which could be translated back into the message. Morse sent the first telegraph message in 1844. For an image of the receiver,see image V400/069 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / New York Public Library / Science, Industry & Business Library |
Bildgröße: | 5029 px × 3555 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |