Patent GB-385065-A (GB)
Title: Apparatus for delivering and measuring liquids, such as fuels and lubricating oil
IPC: G01F11/02
Filed: 1931-11-03
Abstract: 385,065. Liquid meters. HURLBRINK, E., 18, Bayernallee, Westend, Berlin. Nov. 3, 1931, No. 30477. [Class 69 (ii).] The distributing valve of a single cylinder liquid meter is so formed as to throttle the liquid flow at the start of the valve motion ; special valve-actuating and control means are also provided. The general arrangement of the meter is shown in Fig. 1, and comprises a cylinder A, one end of which is connected to a casing containing the distributing valve and operating mechanism therefor, a supply pipe H, a delivery pipe K and hose M, and counting mechanism operated by a pinion D meshing with a rack on the piston-rod C. The distributing valve E, Fig. 2, has a lost-motion connection with a bell-crank lever 40 carrying a cam 41, adapted to co-operate with a roller 42 on a lever 43 acted on by a spring 44. A member 16 or 17 on the piston-rod engages near the end of the stroke with the lever 40, and causes one face of its cam to move the lever 43 and stress the spring 44, a projection 45 or 46 moving behind a lug 47 on the lever 43. When the piston is at the end of its stroke, the lever 43 is released, and the roller 42 acts on the other face of the cam 41 to complete the movement of the lever 40 into contact with a stop 48 or 49, and reverse the valve. In a modification, the roller 42 is replaced by a twofaced cam 42a, Fig. 3, and the projections 45, 46, lug 47, and member 17 dispensed with ; the stroke of the piston is adjusted by a member 7 screwed on to the end of the piston-rod and held by a pin 10. In order to avoid shock, one of the controlling surfaces of the valve E is widened, the widened parts having grooves 61, 62 or being made slightly conical to give a throttling effect. In another form, the lever 43 carries a member 152, Fig. 4, having teeth 153, 154, adapted to co-operate with a stop pin 156 and a stop 158 on a bar 159, respectively ; the bar 159 is carried by a piston 163 acted on by a spring 162 and the supply pressure admitted to a cylinder through a pipe 166. The stop 158 prevents return of the lever 43 after the spring 44 has been stressed, until the rise of pressure consequent on the completion of a stroke of the piston B depresses the piston 163. The stop pin 156 may be raised to stop the action of the apparatus, either when a predetermined quantity of liquid has been delivered, or when the delivery through the hose M is throttled by a cock 122. In the former case, a pointer 181 is set to the desired quantity, a cam 178 being thereby removed from engagement with the pin 156 ; as the meter functions, the early part of each stroke causes step-bystep return of the cam through an eccentric 173 and pawl and ratchet gearing. When the cock 122 is moved to throttle the outlet, the increase in pressure depresses the piston 163 and raises the pin 156 through a fork 160 and lever 157 ; subsequent withdrawal of the pin 156 to restart the meter is effected by operating a cock 182 in the supply pipe to allow relief of pressure in the cylinder 164 through a valve 186. In another form, the cylinder 164 is connected at 57, Fig. 5, to the outlet side, and the hose nozzle has a cock 122, spring-pressed valve 190, and a byepass passage 194 with spring-pressed valve 192. In further modifications, the valve E has a damping disc 102, Fig. 6, with which the piston 163 may co-operate.