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Thomas Coates (1842-1913), managing director of the Whessoe Foundry Co
worked for Robert Dempster and Sons
1914 Obituary 
THOMAS COATES, born in 1842, died at Benwell, Darlington, on the 11th April, 1913.
He received his engineering training at the Elswick Works, Newcastle-on-Tyne, where he was employed for 15 years.
He was then successively manager for 12 years to Messrs. John Abbott and Company, of Gateshead, manager of Appleby Brothers, at the time constructing the plant for the French Panama Canal Works, and manager of the firm of Robert Dempster and Sons, Ltd., of Elland, Yorkshire.
In 1892 he took over the Whessoe Foundry, of Darlington, and greatly developed the business.
Mr. Coates was elected an Associate Member of The Institution on the 3rd February, 1885.