1851 Great Exhibition: Official Catalogue: Class VI.: Henry Watson
165. WATSON, HENRY, Newcastle-upon-Tyne — Manufacturer and Inventor.
Improved pulp strainer, for paper manufacturers.
Hydro-electric machine. This machine is represented in the annexed cut.
Patent valve for fluids.
The cut shows a vertical section of a straight cock. A A is the water-way represented, as closed by the block or key B B, made to move vertically up and down by turning the screw C, which works through a nut H H, fitting loosely into the key. The dark line is an elastic facing, which may be of leather, gutta percha, India rubber, felt, or any material most suitable for the purpose to which the cock is intended to be used, and is secured in its place by the brass ring D D, three screws through which prevent the possibility of its afterwards moving, or the facing material becoming displaced. F F is a bolt screwed into the centre, having a plate which draws the elastic material tightly over the face, and fitting closely the seat G G G G. The horizontal section or plan through the line A A, shows the form of the cock; E E are guides for the key working freely up and down when moved by the screw C.