Early systems based on
ss & Weber 1833
Wheatstone & Cooke
5 Needle Telegraph
1832 Baron Schilling von Canstedt (Russia), System had 6 galvanometers connected by 8 wires to transmitting station – across apartment.
1833 Carl Friedrich Gauss & Wilhelm Weber 1km
single pair of wires, 4 amplitudes & direction of current – developed code
& William Cooke
Both had been working on systems based on Schilling’s, joined forces in 1837.
5 needle system (25 letters) Euston Stn – Camden (2.4km) NWR not impressed despite good demo. 6 wires = 5 signals + return
Needles point to letter being transmitted
1839. System installed for GWR from Paddington to West Drayton (21km) extended to Slough in 1841
Arrest of John Tawell for murder of Sarah Hart. Boarded train at Slough for London. Police sent “He is the garb of a kwaker with a brown coat on which reaches nearly to his feet.”
Tried & executed
good publicity for telegraphy !!