
Below is a link to Graces Guide where you can find a little more information about Smith and Turner (Turner being the Ben Turner of above).
http://www.gracesguide.co.uk/Smith_and_Turner_and_S._Gerish_and_Co_Amalgamated
And here you will find the 1872 patent
http://www.midlandsfloorsprings.co.uk/blog/ben-turners-the-silent-patent-door-spring