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Cooke

 
 
 




Charles Wheatstone


   


  
 Gloucester 6 February 1802 -Paris  19 October 1875
  Telegraph         
 
 
   

    


       
In 1837, in collaboration with G.Cooke, he created his telegraph and in 1843 presented to the Royal Society (2) the famous "bridge" (already experimented by Samuel Hunter Christie 22 March 1784-24 January 1865 (3) which allows to measure with remarkable precision the value of the electrical resistances.
        

 






Telegraph   Wheatstone-Cooke 1837
 Telegraphic cable used for the connection between the train stations of Camden and Euston in London (1)
  

Notes: 1) This piece of telegraph cable was used in Cooke (1806-1879) and Wheatstone's (1802-1875) first experimental telegraph, which opened between Euston Square and Camden Town in London on 24 July 1837. The electrical current needed by the telegraph is carried by the 5 copper wires. The electrical current needed by the telegraph is carried by the 5 copper wires.These wires are in turn protected by an outer shell of wood and resin. These wires are in turn protected by an outer shell of wood and resin. Once telegraphy had been invented, attention focused on finding the best technical solutions for transmitting signals over long distances. Once telegraphy had been invented, attention focused on finding the best technical solutions for transmitting signals over long distances. Copper rapidly became the favorite conductor, because it has a low resistance and does not rust. Copper rapidly became the favorite conductor, because it has a low resistance and does not rust. Overland telegraphs had become well-established by the 1850s. Overland telegraphs had become well-established by the 1850s.

2) An account of several new instruments and processes for determining the constants of a voltaic circuit Sir Charles Wheatstone by R. and J.E. Taylor, 1843 
3)  S. Hunter Christie, The Bakerian Lecture: Experimental Determination of the Laws of Magneto-electric Induction in different masses of the same metal, and its intensity in different metals., Philosophical Transactions of the Royal Society of London, vol. 123, 1833, pp. 95–142.   (https://en.wikipedia.org/wiki/Samuel_Hunter_Christie#cite_note-2 )