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Engine order telegraph. An engine order telegraph or E.O.T., also referred to as a Chadburn, [1] is a communications device used on a ship (or submarine) for the pilot on the bridge to order engineers in the engine room to power the vessel at a certain desired speed.
Morse telegraph. Hughes telegraph, an early (1855) teleprinter built by Siemens and Halske. Electrical telegraphy is a point-to-point text messaging system, primarily used from the 1840s until the late 20th century. It was the first electrical telecommunications system and the most widely used of a number of early messaging systems called ...
Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas pigeon post is not. Ancient signalling systems, although sometimes quite extensive and sophisticated as in ...
Macadamised roads (the basis for, but not specifically, tarmac): John Loudon McAdam (1756–1836) [5] The pedal bicycle: Attributed to both Kirkpatrick Macmillan (1813–1878) [4] and Thomas McCall (1834–1904) The pneumatic tyre: Robert William Thomson and John Boyd Dunlop (1822–1873) [11]
The Cooke and Wheatstone telegraph was an early electrical telegraph system dating from the 1830s invented by English inventor William Fothergill Cooke and English scientist Charles Wheatstone. It was a form of needle telegraph, and the first telegraph system to be put into commercial service. The receiver consisted of a number of needles that ...
An engine order telegraph dial located in the engine compartment of U-505. "MT" is Maschinen Telegraf, (Telegraph Machine), and "Bb", indicating Backbord, (Port). The Type IXC was a further refinement of the class with storage for an additional 43 tonnes of fuel, increasing the boat's range.
Earth-return telegraph. Earth-return telegraph is the system whereby the return path for the electric current of a telegraph circuit is provided by connection to the earth through an earth electrode. Using earth return saves a great deal of money on installation costs since it halves the amount of wire that is required, with a corresponding ...
The Electric Telegraph Company was the world's first public telegraph company, founded in the United Kingdom in 1846 by Sir William Fothergill Cooke and John Lewis Ricardo, MP for Stoke-on-Trent, [1] with Cromwell F. Varley as chief engineer. [2] Its headquarters was in Founders Court, Lothbury, behind the Bank of England. [3]