Patent GB-234857-A (GB)
Title: Improvements in and relating to apparatus for delivering measured volumes of liquid
IPC: B67D7/16
Filed: 1923-12-04
Abstract: 234 857. Hawker, J. R. S., Hayes, A. H., Smith, H. W., Smith, R. V., and Smith, I. C. V. Dec. 4, 1923. Fixed-chamber apparatus with counting and registering apparatus. - Comprises a measuring vessel, mechanism whereby an operator may readily make a selection of one of several predetermined different volumes to be received into said vessel, means to prevent discharge of liquid until said volume is received into the vessel, mechanism whereby a valve or cock is automatically operated to cut off the supply as soon as the selected volume is received into the vessel, said cock being maintained in an isolating position until the measured quantity is discharged, and mechanism whereby an operator can cause the liquid to be discharged when desired into a measuring chamber 3 with a calibrated transparent portion 4 into which delivers a supply pipe 5 connected to a source of supply below the apparatus. The liquid is raised through the medium of a suction pipe 9 of a rotary air pump 8 which delivers the air to the supply tank. Disposed within the chamber 3 is a float 10 guided on rods 11, and depending from the float is a sleeve 12 carrying a series of radiating fingers 14 spaced at distances corresponding to the volumes marked on the chamber 3. A pivoted trip member 15 is swung horizontally by means of a worm 16 so that it stands in the path of a selected finger 14. The tripping-piece 15 normally holds a pivoted lever 21 from being pulled down by its. spring 20. The lever is connected by a link 23 and pivoted arm 24 to the main liquid ccck spindle 22a, and when tripped the mechanism closes the liquid cock and opens an air cock 25 in the pipe 9 to destroy the vacuum within the chamber 3. The valve parts are held in this position by engagement of a handle 28 on a link 29 with a notch 26. To deliver liquid, the Landle 28 is pushed out of the notch, and the further movement of the valve 22 opens the chamber 3 to discharge. The apparatus is reset by pulling down the link 29 until the tripping-piece again holds the valve arm 21. The projections or fingers 14 are formed on separate blocks each secured by a set-screw, and the pump is aligned by a vertical rod passed through holes in the block. The trip-piece 15 is movable in a horizontal plane about the pivot b and is secured to a bracket c rocking in a vertical plane. A triggerpiece g rotates with the pivot d and engages a finger 21a hinged to the pivot of the valve arm 21. The latter carries a pin h engaging a slotted arm 25a secured to the spindle 25b of the air valve. The valve 25 comprises a hollow part j open to the atmosphere at the end k and adapted to communicate with the pipe 9 through a port b. The pump may be reversed to assist discharge, and in this case a clack-valve n closes the opening l. In a modification, the sleeve 12 slides in a squared rod and is in one with a sleeve longitudinally grooved to receive the abutments. This sleeve is rotated to bring any selected abutment into the path of the trip 15. A registering device W is fitted. Specification 213,996, [Class 135, Valves &c.], is referred to.