1851 Great Exhibition: Official Catalogue: Class V.: Bryan Donkin and Co
42. DONKIN, BRYAN, and CO, Bermondsey — Manufacturers and part Inventors.
Patent disc water-meter.
Patent improved disc engine, intended to effect rotary action, with high speed, and in little space; it is free from dead points.
Disc pump, with rotary instead of an alternating motion, and producing a continued stream of water without air-vessels or valves.