Telegraph: Difference between revisions
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[[File:Morse-Vail telegraph key 1844 National Museum of American History.jpg|thumb|An example of a telegraph]] | |||
A telegraph is a device which functions as part of an electric communication system. A telegraph allows for messages to be sent electronically over long distances through wires. | A telegraph is a device which functions as part of an electric communication system. A telegraph allows for messages to be sent electronically over long distances through wires. | ||
== Function == | |||
A telegraph works by using a hand-operated key to break and complete an electric circuit, sending short and long pulses of electricity along a wire to a receiver. These electrical signals activate an electromagnet at the receiving end, which stays down until the circuit on the other end is broken. A human operator then translates the series of short and long pulses with a binary code such as Morse Code into a message, or "telegram." | |||
Latest revision as of 01:23, 16 March 2026
A telegraph is a device which functions as part of an electric communication system. A telegraph allows for messages to be sent electronically over long distances through wires.
Function
A telegraph works by using a hand-operated key to break and complete an electric circuit, sending short and long pulses of electricity along a wire to a receiver. These electrical signals activate an electromagnet at the receiving end, which stays down until the circuit on the other end is broken. A human operator then translates the series of short and long pulses with a binary code such as Morse Code into a message, or "telegram."