Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 140,242 pages of information and 227,382 images on early companies, their products and the people who designed and built them.
Teasdale Brothers of Thomas Street, Bank Top; Warehouse, Feethams, Darlington and Bridge Road, Stockton.
1904 Woolf-type compound beam engine at Darlington Waterworks. Photographed by George Watkins in 1952
1906 Started in the i/c engine market
1910 The i/c engines ranged from 3 to 40 hp. Later increased to 50 hp.
1914 Directory: Listed as Iron Founders. 
1915 Introduced the New Improved Teasdale Oil Engine in sizes 3 to 35 hp
Maker of stationary engines.