Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 132,627 pages of information and 209,984 images on early companies, their products and the people who designed and built them.
of Aston Lane, Perry Barr, Birmingham.
1912 Became private company - S. Bill and Co
1936 Name changed to Bill Switchgear
1937 Moved to new factory.
1961 Manufacturers of low tension airbreak switch and distribution gear. 1,250 employees. 
At some point became part of Delta Metal Co's Electrical Division
1998 The Electrical Division was consolidated under the MEM brand
2003 The Electrical Division of Delta was acquired by Eaton Corporation of USA, including the MEM, BILL and Holec brands