Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,144 pages of information and 233,396 images on early companies, their products and the people who designed and built them.
1849 Introduced a 'hydrostatic governor', in which a screw propellor rotated in a 'vase' containing oil, water, or other liquid. As speed increased, the propellor rose in the liquid, to move the governor's lever via a trunnion.
1850 Simpson and Shipton, 4 Corporation Street; model of steam engine and a saw frame. Intending exhibits for the 1851 Great Exhibition. 
1852 Simpson and Shipton, Knott Mill, a ten-horse power reciprocating engine. Medal at the 1851 Great Exhibition.