Patent GB-466808-A (GB)
Title: Improvements in or relating to flushing systems for water closets and the like
IPC: E03D3/10
Filed: 1935-12-05
Abstract: 466,808. Flushing-valves. WHITE, W. S. Dec. 5, 1935, No. 33773. [Class 135] [Also in Group I] A flushing system for water - closets &c. includes a flush valve 14, Fig. 8, having a water inlet 21, Fig. 6, a reservoir 23 to hold a quantity of water under pressure when the valve is closed, an air intake 27, a jet 32 connected with the water inlet and located with respect to the air intake so as to draw air into the reservoir by suction, a manually operable valve 53 in the outlet conduit of the valve housing, a pressure chamber 19, Fig. 8, separate from the flush valve and connected with the reservoir 23 to receive water therefrom and having a space for the compression of air, and a valve-controlled drain pipe 112 connected with the bottom of the pressure chamber The water inlet has a gauze screen 28, and a ball valve 29. Water flowing through the jet 32 draws air through the intake 27 past a valve 78. Air and water flow into the chamber 23, and through a conduit 18 to the pressure tank 19 where the air is compressed. A small quantity of water flows through passages 34, 35 byepassing a ball valve 36 into a chamber 43 and building up sufficient pressure to force a hollow piston 46 against a valve seat 45. The piston contains a tilt valve 53 actuated by a handle projecting outside the outflow conduit 24 and acting on the valve stem 57. When the valve 53 is tilted, water flows from the chamber 43 into the outlet 24 by way of holes 49 and neck 56 in the piston and the pressure in the chamber 43 is reduced. The pressure in the containers 19, 23 acting on the piston moves it to the left and accordingly the reservoir 23 and container 19 are emptied through the outlet 24. The piston 46 is subsequently re-seated and the containers 19, 23 filled by the action of the water flowing through inlet 21. In the event of a reverse flow through the system, ball valves 29 and 36 close to prevent polluted water from flowing into the source of supply and plate 78 is pressed against a resilient surface 74 to prevent escape of water through the air intake 27. In a modified valve construction, Fig. 3, the neck 56 communicates with a chamber 83 through an outlet 24, the chamber being drained through a conduit 84. The chamber 73 of the air intake does not communicate directly with the reservoir 23 as in the first construction but through a port 79 and apertures 80, 85, placed forwardly of the port 79 with respect to the flow of water so as to increase the suction exerted upon the chamber 73. The valve plate 78 is normally held against a resilient plate 74 by a spring 86. This valve structure is particularly adapted for incorporation with a closet bowl as shown in Fig. 11. The bowl is apertured at 89 to receive flushing water directly from the chamber 83 and is also apertured at 90 to receive water flowing through the conduit 84. The valve housing is closed at both ends by covers 98, 99 and also has an inside flange 93 co-operating with a shoulder 96 on the valve casing 20. The part 94 of the housing has a drain 95 leading into the bowl. The stem 57 of the tilt valve 53 is actuated by a handle 66 through a push rod 63 and a trip 108. The drain pipe 112, Fig. 8, may be connected as shown to the cold water tap 114 of a washbowl 115 so that water is drawn frequently from tank 19 and waterlogging of the system is avoided. In a modification of the air inlet valve, the fixed partition 71 may have a central offset portion providing a flat seat for the plate 78.