Ambrose Shardlow and Co
of Ealing Works, Sheffield.
Forgemasters and manufacturers of micrometers.
1869 Company founded by Ambrose Shardlow as a general engineer and machinist at Bridge Street, Attercliffe, Sheffield
1900 Specialising in crank-shafts
1907 Making pneumatic hammers (see illustration)
1911 30 bhp gas engine. 
1940 Employed 450 persons producing 200,000 crankshafts annually.
1961 Engineers and drop stampers and manufacturers of crankshafts and micrometers. 1,800 employees. 
1963 Taken over by GKN.
Ambrose Shardlow by David Price