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Frank Pearn and Co of West Gorton, Manchester.
See Frank Pearn
1871 R. and F. (sic) Pearn donkey pumps - see illustration
1875-78 See Patents of Frank and Sinclair Pearn
1880 Partnership and name change. '...the Partnership heretofore subsisting between the undersigned, Frank Pearn, Sinclair Pearn, and Arthur Collings Wells, carrying on business as Engineers, under the style or firm of Frank Pearn, Wells, and Co., at West Gorton, near the city of Manchester, has been dissolved, by mutual consent, as from the 31st day of January last. The business will henceforth be carried on by the said Frank Pearn, Sinclair Pearn, and Thomas Addyman, as Copartners, under the style or firm of Frank Pearn and Co....'
1881 Advert for Manchester Donkey or Wall Pump; The Manchester Pumping Engine.
1883 Frank Pearn and Co were advertising in 'The Textile Manufacturer' as sole licensees and makers of the 'Portland' Patent Rotary Pump in England
1886 Makers of Clarke's railway signal wire compensator 
1886 George Richards and Co started to build patent universal horizontal surfacing, boring, milling, drilling and tapping machines under licence from Frank Pearn and Co. They were advertised jointly by Frank Pearn and Co and George Richards and Co. - Pearn-Richards
c1900 Three engines for Stockport Waterworks (Wilmslow Station).
1901 Duplex compound steam pump described in The Engineer
1905 Advert for pumps, air compressors, surface and jet condensers. 
1913 Advert for pumps. 
1914 Directory: Listed as 'Pumping Machinery for all purposes'.Kelly's Directory of Durham, 1914 p765.
1914 Death of Frank Pearn; Sinclair continued the business
1917 Advert for pumps. 
1919 Advert for pumps. 
1920 Two horizontal vacuum pumps.
1927 Advert for pumps. 
1940 Advert. Pumps 'Pumps for all purposes'. 
1945 Advert for pumps. 
1954 Death of Harold Walker Pearn, who had been chairman and managing director for many years
1955 Resolution to wind the company up.