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Electrical engineers, particularly of mining machinery, of Woodfield Works, Harrow Road, London.
1884 Walter Thomas Goolden entered a partnership with Mr. Henry Edmunds.
1888 Trotter retired from the firm which became Goolden and Co. Goolden then associated himself with Mr. Llewellyn B. Atkinson.
1888 E. B. Vignoles started work in the workshops of W. T Goolden and Co; the company had "a quite substantial business" making direct-reading electrical instruments developed by the company and its predecessors. Records showed that orders had been received as early as 1886.
1895 Messrs Evershed and Vignoles purchased the instrument section of Goolden and Trotter where they worked.