1851 Great Exhibition: Official Catalogue: Class VI.: Richard and John Rankin
From Graces Guide
466. RANKIN, RICHARD and JOHN, Liverpool — Manufacturers.
Patent vertical smut machine and corn screen. The internal rotary cylinder with beaters is made of wrought iron, and the external stationary cylinder of cast iron. A strong continuous current of air is made to pass through the wheat, while it is between the two cylinders, carrying off the dust, at the upper part of the machine, as soon as it is disengaged from the wheat by the beating process. A separator is attached, for extracting sand, seeds, and small grain.
Registered portable driving apparatus; invented for driving the above machine.
Models of both machines, to be driven by hand.