GB323895A - Improvements in or relating to portable fire extinguishers - Google Patents

Abstract

323,895. Ashley, W. E., and Boyd, W. J. Dec. 17, 1928. Portable pressure reservoirs.-In a fire-extinguisher of the kind charged with liquid and gas under pressure, a flexible diaphragm e is secured at one end of the container a between an end piece d and a ring f. A boss g secured in the centre of the diaphragm has a valve facing g<1> co-operating with an annular valve seat d' on the piece d, and carries a rod j the lower end of which closes an opening k' in the dip tube i. When the boss g is raised by a screw cap n, liquid enters the dip tube by the opening k' and escapes' by the outlet h<1>, o to the nozzle p. In a modification, Fig. 2, the rod r is fixed to the base of the container a and carries at its upper end a member a<1> having an annular valve seating co-operating with a valve facing r<2> on the boss g. In this case, the boss is' screwed down to move the valve facing from the seating r<1>. The dip tube i may be fixed to, or slidable within, the boss g. In other modifications, the dip tube is fixed to the boss g, and carries a valve member at its lower end co-operating with a valve member at the base of the container. In this latter arrangement, the boss may be arranged to move either up or down, to open the discharge passage. The boss may be moved by a cam or lever arrangement, instead of by a screw cap.