Edward Davy (16 June 1806 – 26 January 1885) was an English physician, scientist, and inventor who played a prominent role in the development of telegraphy, and invented an electric relay.

[2] Davy won the prize for botany in 1825, was licensed by the Worshipful Society of Apothecaries in 1828 and the Royal College of Surgeons in 1829.

In 1836 he published a small book Experimental Guide to Chemistry, at the end of which was a catalogue of goods supplied by his firm.

Both Davy and the exhibition hall were threatened with legal action on the grounds that they were infringing the Cooke and Wheatstone telegraph patent.

[5] Davy invented a relay which used a magnetic needle which dipped into a mercury contact when an electric current passed through the surrounding coil.

[6] Davy's marriage broke down shortly after the Regent's Park demonstration and he found himself in litigation with his wife and her creditors.