Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,955 pages of information and 228,874 images on early companies, their products and the people who designed and built them.
Sydney Slater Guy (1884-1971) of Guy Motors
1884 Q4. Born in Wolverhampton registration district
He grew up in King's Heath, Birmingham
One of the senior draughtsman at GEC Witton.
Draughtsman with the Noble Automobile Syndicate, Coventry
1906 He was later with Humber as service manager.
1909 At age 24 he was Works Manager of Sunbeam in Wolverhampton.
1911 Living in Kings Norton, Isiah Guy 50, commercial traveller in hardware, Emmeline Guy 52, Sydney Slater Guy 26, works manager, motor works, William Ewart Guy 17, engineer's fitter (steam engines), Frank Maudie Guy 14, Frederick Jane Guy 12
1914 Left Sunbeam, where he was works manager, to start his own company to produce commercial vehicles almost next door to Sunbeam, Guy Motors.
1917 Patented Overhead valve engines. 
1919 Introduced the first British eight-cylinder car with automatic chassis lubrication
1923 Married Leila Brooks in Bucklow, Cheshire
Pioneered the production of a variety of different kinds of motor vehicles/
1925 Introduced the first military cross-country vehicle with three-axles and four-wheel drive.
1926 Advanced to Member of the Institution.
1926 Introduced the first six-wheeled double-decked bus and electric trolley-bus
1939 Introduced a four-wheeled rear-engine driven all-welded armoured car in bulletproof plate.
1939 Sydney S Guy, Managing director, lived in Shifnal with Leila Guy
1950 His daughter Elizabeth Hazel was married 
1953 Announcement of the forthcoming marriage of his son Rowland Slater. 
1971 Obituary.  Died aged 86 years.