1862 Company established by William Robert Sykes

1899 Incorporated as a limited company.

By 1904 there was a very large installation at St. Enoch's Station, Glasgow and was being adopted in several signal-boxes on the South Eastern and Chatham Railway.

1907 Public company.

1907 The company was registered on 24 April, in reconstruction of a company of similar title.

1914 Manufacturers of all kinds of electrical and mechanical signalling apparatus in connection with railways.

1961 Railway signals and electrical engineers and manufacturers of locomotive grease lubrication equipment, fuel economisers, power operated fire doors; motor tools and accessories. Specialists in coil winding and impregnating and instrument casework.