GB709932A - Improvements in or relating to liquid measuring and dispensing apparatus - Google Patents

Abstract

709,932. Dispensing liquids. AVERY-HARDOLL, Ltd. May 12, 1952 [May 24, 1951], No. 12223/51. Class 116 Means for automatically cutting off the supply of liquid and closing the valves after the delivery of a predetermined quantity comprises a lever, operable by the starting control and having projection and a settable disc with a slot: after presetting and operating the starting control, the projection engages the edge of the disc and rocks about the projection, to open the valve and close the switch. Engaging the projection in the slot effects partial closure of the valve when the disc returns to the zero position and further entry into the slot effects complete closure of the valve and switching off of the motor. A shaft 10 is connected to the indicators, a shaft 11 to a totalizer, both shafts rotating once for each unit delivered, and a shaft 12 for zeroizing. On a spindle 14 is a settable disc 13 having a slot 33 with chamfered edge, a frustoconical face and a toothed periphery against which bears a locating roller 17. A gear wheel 21 coaxial with the disc 13 meshes with a gear wheel 22 on a shaft 23 which engages with a pinion 24 on a shaft 26 coaxial with which is a pinion 25 engageable with a pinion 27. The pinion 27 is displaceable by a cam 66 on a lever 38' pivoted to a lever 36 which is guided in the pump casing and supports the lever 38 on a pivot 37. The lever 38 has a projection 39 bearing against the disc 13 and the projection is shaped to allow gradual entry into the slot 33. The lever has a slot engageable by a rod 43 operated by a starting handle 44 and retained by a detent. The lever is displaceable against the spring 71 to prevent jamming. A spindle 48 carries a two-armed lever, one arm 49 having a roller engaging in a slot 51 at the end of lever 38 and the other arm 52 engaging a cam 53 eccentrically and adjustably mounted on the shaft 23 and rotatable once for each unit delivered. Disc 65 retains the lever 36 in position to prevent delivery unless zeroizing has been effected and to prevent zeroizing until the starting handle is off. The lever 38 carries at one end a lever 72 connected by a rod to a valve 41. An arm 75 is pivoted at 76 and engages the rods and an arm 77 engages an abutment on the lever 72 so that upward movement of the lever opens the valve. A spring 79 urges the valve to the closed position. A lever 82 is connected to the rod 72 and to a pivot 81 also carrying a lever 83 connected to a rod 80 and the motor switch. A spring 85 urges the lever 83 to the switch closed position. In operation, turning a knob sets the disc 13 for a predetermined amount. The handle 44 is operated to open the valve and close the motor switch. During the delivery of the last gallon projection 39 engages the slot 33 and partially closes the valve at the completion of delivery, lever 52 slides on the cam 53 and effects further movement of the lever 38 to completely close the valve and close the motor switch the latter being effected at this stage by a lost motion connection. Specifications 426,267, 615,776 and 657,146 are referred to.