Simpson and Shipton
See Shipton and Co and Shipton and Simpson
Joseph Simpson and James Alfred Shipton
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.[1]
1850 Simpson and Shipton, 4 Corporation Street; model of steam engine and a saw frame. Intending exhibits for the 1851 Great Exhibition. [2]
1852 Simpson and Shipton, Knott Mill, a ten-horse power reciprocating engine. Medal at the 1851 Great Exhibition.[3]