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Richard Johnson, Clapham and Morris of Dale Street, Manchester, then Lever Street, Manchester (head office and warehouse), Newton Heath, Manchester (works); and of Stanley Street, Liverpool, wire merchants.
Manufacturers of reinforced brickwork and the clothing of steel-framed and reinforced concrete buildings of 24 Lever Street, Manchester.
c.1814 Company founded.
Also see Richard Johnson
c.1872 William Clapham was taken into partnership and the business assumed the title of Richard Johnson, Clapham and Morris.
1878 Exhibited Wire netting, paper machine wires, miners' safety lamps, &c., at the Paris Exhibition
1881 Death of the senior partner, Richard Johnson
1885 Opened a London sales office; their premises at this time were in Manchester and Liverpool
1886 Goad's insurance plan for 1886 shows R J,C&M's Lever Street warehouse on the south east side of Stevenson Square. Ground area 110 ft by 120 ft.
1891 Public company.
1912 Advert Showing Johnsons' Works at Newton Heath, Manchester.
1914 General hardware, iron and metal merchants. Specialities: galvanized wire netting, wire work, wire drawers, brass foundry, high-tension bronzes, safety lamps for miners, woven wire of all kinds, wire, reinforcements for concrete and bricks, tinplates, sheet iron, galvanized corrugated iron, tinned sheets, sheet zinc, copper, spelter, tin lead, hardware and hollow ware. 
Directors: William Henry Johnson (Chairman and Managing Director), William Morton Johnson, Edwin Stone, Arthur James Sinclair, Carl Demel, R. H. Holman.
1925 Arthur Lawrence Johnson and the company patented an improvement in miner's safety lamp, to provide locking of the oil container in the body of the lamp.
1927 January 24th. General Manager, Alfred Hankinson, of the Australian business died at Sydney, N.S.W. aged sixty eight.
1961 Engaged as metal, electrical and hardware manufacturers and factors. 560 employees. 
Possibly connected with Johnson's Reinforced Concrete Engineering Co?