Patent GB-501226-A (GB)
Title: Improvements in or relating to metering apparatus for distributing measured quantities of fluids
IPC: G01F15/00
Filed: 1938-01-29
Abstract: 501,226. Gas-meters. COMPAGNIE POUR LA FABRICATION DES COMPTEURS ET MATERIEL D'USINES A GAZ. Jan. 29, 1938, No. 2924. Convention date, Jan. 30, 1937. [Class 54] [Also in Group XVIII] Apparatus for dispensing gas, vapour and other fluids comprises one set of mechanism for providing a predetermined supply, a second' set of mechanism for providing a manuallycontrolled supply and locking mechanism which comes into operation automatically on operating one set of mechanism to maintain the other set of mechanism inoperative. In the construction shown, the predetermining mechanism comprises a circular disc 24 which is rotatable to predetermine the quantity of fluid to be delivered, the periphery of the disc being formed with a notch 25 which, in the inoperative position, engages a roller 3 on a lever 1 pivotally mounted on a shaft 2 and provided with a return spring 5. The control shaft 12 of the delivery valve carries a spring-loaded toothed sector 14 which meshes with a sector 13 mounted on a shaft 10 to which a manually operated handle 10a is secured. The shaft 12 also carries a lever 11 which is engageable with a pivoted spring- loaded stop 6 on the lever 1. The right-hand end of the lever 1 normally engages a cam 9 on the shaft 10 to prevent movement of the handle 10a. Mounted on a shaft 16 near the left-hand end of the lever 1 is a lever 15 provided with a return spring 18 and a cam 20, Fig. la, which engages a lever 21 controlling the clutch 26 of the disc 24. In order to deliver a predetermined volume of fluid, the disc 24 is rotated into the appropriate position, the roller 3 thereby engaging the periphery of the disc and rotating the lever 1 in an anticlockwise direction against the force of the spring 5. Rotation of the lever 15 is prevented by the left-hand end of the lever 1 engaging with an'abutment on the lever 15. The rotation of the lever disengages its right-hand end from the cam 9 and the handle 10a may then be rotated to commence delivery, such rotation causing interengagement of the lever 11 with the stop 6. Delivery proceeds until the roller 3 again engages with the notch 25 in the disc 24, which latter is driven by the flow meter when the lever 1 is returned to its original position by the spring 5, and the lever 11 is disengaged from the stop 6. The sector 14 is then rotated anticlockwise by its .return spring to close the delivery valve. In the case of manually-controlled delivery, the lever 15 is rotated to bring its upper end into engagement with a fixed stop,23, in which position a finger 17 on the lever 15 engages with a pin 4 on the lever 1, which latter is thereby held in the operative position against the force of the spring 5. Rotation of the lever 15 causes the clutch 26, Fig. 1a, to be disengaged to render the predetermining mechanism inoperative. Delivery is initiated by rotating the handle 10a and is stopped by disengaging the lever 15 from the stop 23 when the lever 1 is returned to its original position by the spring 5 and the delivery valve is closed in the manner described previously.