Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,101 pages of information and 233,633 images on early companies, their products and the people who designed and built them.
of Lincoln Works, Chesterfield
1900 Clench and Co amalgamated with Bryan Donkin and Co; re-registered as Bryan Donkin and Clench Ltd. Bryan Donkin, Junior continued as chairman but relinquished active participation in the management of the works.
1903 Donkins moved to Chesterfield.
1903 'SPRING CLEANING EXTRAORDINARY. Those not initiated who stood round inspecting a small apparatus placed on a hand truck outside the L.D. and E. C. Railway Station on Tuesday last would not have thought that it represented an invention which certainly creates a domestic revolution so far as house cleaning is concerned. The invention - that of Mr H. C. Booth — has been taken up by the Vacuum Cleaner Company, Limited, one of whose directors is Mr Frederick Clench, of Chesterfield, and it is at the works Messrs Bryan, Donkin, and Clench, at Chesterfield that the apparatus is now being manufactured. The invention has only been perfected a few months, but already is installed in the Royal Palaces, the Houses of Parliament, by the Railway Companies and the chief London hotels. ....' 
1903 Catalogue issued on 1903 list of gas-exhausting plants and gas valves. 
1906 Private company. Again renamed as Bryan Donkin Co Ltd.