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John Tasker, founder of John Tasker and Sons, entrepreneur and benefactor
1819 Born in Devon
1839 Started work as a shoemaker in Pond Hill, Sheffield
1848 Birth of son John Henry Royle Tasker
c.1855 Moved to Devonshire Street
Introduced gutta-percha and india rubber to Sheffield
c.1866 took premises in Angel Street, Sheffield, supplying leather belting; also developed the engineering side of the business which expanded rapidly, taking larger premises in Station Road - eventually becoming Tasker's Engineering Co
1871 Mill strap manufacturer, india rubber and gutta percha dealer, employing 8 men, 1 boy and 2 women; lived in Nether Hallam, Sheffield, with Emma Tasker 51, Eliz H R Tasker 22, William Tasker 21, Robert C. Tasker 17, Catherine E Tasker 15, Mary E Tasker 13, Fred Tasker 10
1877 Established one of the first telephone exchanges in the provinces, at his Angel Street store; this became the Sheffield Telephone Exchange but demand was slow to build up.
1878 Mayor of Sheffield
1878 Installed generating plant for electric lighting which was demonstrated to the public
1882 Joined IEE as an associate
1886 Member of IEE, of the Telephone Exchange Co, Angel St, Sheffield 
By 1892 had largely retired from business; his wife died this year