Patent GB-111711-A (GB)
Title: A Regulating Device for Watering Carts and the like.
Inventor: KILBURN BERTRAM EDWARD DUNBAR
IPC: E01H3/02
Filed: 1916-12-06
Abstract: 111,711. Kilburn, B. E. D., (Saurer, A. [Firm of]), Dec. 6, 1916. Closure members.-A spraying device for watercarts &c. is provided with a longitudinally and rotatably moving piston operated by the pressure of the water so that the longitudinal movement controls the width and the rotary movement the density of the spray, the movement being effected bv hand-operated control pistons. In the form shown in Figs. 1 and 2, the spray head 1 having spraying holes 9 is closed at each end by covers 2, 3 and contains the regulating piston 4 and handoperated control piston 5 sliding therein for controlling the longitudinal movement of the piston 4 A cylinder 29 mounted above the spray head contains a similar control piston 30 actuating a regulating piston 28 carrying a. rack 27 engaging both on the piston 4 by which the latter may be rotated. The control piston 5 which is moved by means of a bell-crank lever 34 engaging a groove 14 therein is hollow and provided with slots 11 and grooves 12, 13 which coact with bridges 23, 24 and rings 16 on the regulating piston 4 to form passages for the water. In the position shown in Fig. 1, water from the pipe 6 passes to the chamber b formed in the piston between the bridges 23, 24 and from thence it passes partly to the spray holes 9 and partly over the bridge 24 to the chamber a exerting a pressure which moves the piston 4 to the right until the passage 12 is closed. Any water in the chamber c may escape through the port 11 to the outlet 10. Movement of the piston 5 to the left will cause the passage 13 and thus the chamber c to be connected to the water supply and the chamber a to the outlet 10, and thus cause the piston 4 to move to the left. The pistons 28, 30 are provided with passages and are actuated in a manner similar to the pistons 4 and 5. In the form shown in Figs. 4 and 6 the second regulating piston which rotates the first piston 4 is mounted coaxially with it and engages it directly. The pistons 4 and 5 are constructed and moved longitudinally as in Fig. 1. Water is supplied through the breeches pipe 43 to the pistons 4, 5 on the one side and on the other to a chamber containing a rotary valve 49 provided with the ports as shown in Fig. 6 and comprising a casing and two opposite blades 58, 59 projecting beyond the casing and forming with the bridges 60, 61 projecting from the spraying head four chambers d,e, f, g. Within the valve 49 is a second rotary valve actuated by a handle 56. In the position shown in Fig. 6, water passes from the casing 45 through the conduit 52 into blades 58, 59 thence through slots 71, 72, passages 64, 67, slots 73, 75, 77, 79 into chambers d, thus rotating the valve in a clockwise direction until the slots 71, 72 are closed by the bridges between the ports 64, 65 and 66, 67 respectively. Meanwhile water from the chambers e, g escapes through the slots 80, 85, 78, 73 to the centre of the valve, and from thence to the discharge. The rotation of the valve 49 is communicated to the' piston 4 by a ring 86 provided with arms 87. 88 engaging projections on the piston 4.