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Samuel Chatwood (c1833-1909) of the Chatwoods Patent Safe and Lock Co
of Lancashire Safe and Lock Works, Bolton
1864 Continued Chatwood and Parkin after Parkin left
1878 Patents to Samuel Chatwood, of 120, Cannon-street, London, Bank Engineer, in respect of (1) the invention of "improvements in hydraulic arrangements for lifting and lowering and other purposes," and (2) the invention of "improvements in securing doors or gates of safes and bank rooms, and other doors, gates, and shutters."
1881 Patent for improvements to bicycles and tricycles 
1910 Obituary 
SAMUEL CHATWOOD, founder of the firm of Chatwood & Co., safemakers, of Bolton, died on December 2, 1909, in his seventy-seventh year.
Although best known as a maker of safes, he was an engineer of wide knowledge and experience, and in his earlier years was recognised as an inventor in many fields of engineering. While devoting most of his time to his business, he found time to produce improvements in steam-hammers, engines, boilers, mechanical stokers, mining and colliery plant. He also invented an hydraulic balance for direct-acting lifts, which, in a modified form, was very widely used.
He was an associate member of the Institution of Civil Engineers, a member of the Institution of Mechanical Engineers, and of several other scientific bodies.
He was elected a member of the Iron and Steel Institute in 1877.