Patent GB-218270-A (GB)
Title: Improvements in or relating to apparatus for measuring and delivering uniform quantities of inflammable or other liquids
IPC: G01F11/02
Filed: 1924-06-12
Abstract: 218,270. McEwin, J. G. June 25, 1923, [Convention date]. Void [Published under Sect. 91 of the Act]. Actuating by hydraulic motors. - A measuring chamber having a movable member therein is arranged in communication with means for supplying liquid and with a delivery pipe whereby the admission of liquid under pressure on either side of the movable member will cause the latter to expel the liquid supplied to the chamber on the previous operation of said member. The chamber 14 is fitted with a free piston, 15 and is connected at the ends by pipes 17 18 to a fourway cock 19 from which lead pipes 20, 21 to a main supply pipe 22 and to a two-way discharge cock 23 respectively. The measuring units are arranged in pairs, the plugs of the cocks 19 of each pair being connected by a spindle, 25. The spindle 25 of each pair of units is operated through gearing 26, 27 from a shaft 28 moved by ratchet and pawl mechanism 29, 31 from a lever 30. The position of the cock 19 is indicated by a marker 33 reading against markings on a disc 32 on the shaft 28. A set-screw 34 at one end of the measuring chamber serves to adjust its capacity. The pipe 21 terminates at the top in a hollow plug which supports the body of the discharge cock 23 having delivery nozzles 24 projecting from opposite sides thereof. The discharge valves are operated from a hand lever 42 through a shaft 38 having a series of arms 39 connected by links 40 to slotted lugs 41 on one of the delivery nozzles. Petrol tins to be filled are carried on skips run on roller conveyers fitted with stops to position the tins correctly to receive the ends of the nozzles. The outer end of each nozzle is curved downwardly to permit them to enter freely the filling orifices 52 of the petrol tins and a resilient washer 53 serves to make a tight joint. The air or gases displaced during the filling operation pass into a duct 55 and through a pipe 56 and further pipes to the atmosphere at some distance from the apparatus. A lip 57 on the nozzles directs the liquid against the side of the receptacle to prevent splash. ing and a ball valve 59 is arranged to close the duct 55 in the one of the pair of nozzles not in action for the time being. The top of the chamber 58 for the valve 59 is formed with an outlet 60 communicating by means of a short pipe 62 and a flexible pipe 63 and pipe 64 with a main outlet pipe for gases. The short pipe is provided with a valve 66 which when air is passing is normally raised but which drops when the piston 15 reaches the end of the cylinder and this can be seen through sight openings 72 thus indicating when the containers have been filled. In a modification shown in Fig. 10 the chamber is more or less elliptical and is made in two parts provided with double walls 77, 78 the inner one 78 of which is perforated. A diaphragm 75 of flexible material clamped between the parts is moved by the incoming liquid from one perforated wall to the other perforated wall, thus expelling the liquid which has entered on the previous operation. The capacity may be varied in this form by removing or adding packing rings at the joint between the two halves of the chamber.