Patent GB-625698-A (GB)
Title: A device for supplying a measured quantity of liquid
IPC: G01F11/04
Filed: 1946-11-08
Abstract: 625,698. Delivering measured quantities of liquids. BULLOCK, S. E., KENDRICK, W. E., and FAULKNER, T. H. Nov. 8, 1946, No. 33258. Addition to 610,596. [Class 106(v)] [Also in Group XIX] The device described in the parent Specification is improved or modified by (1) making the ends of the rotatable tubular valve structure of conical shape and fitting these conical ends into valve seatings having cylindrical outer walls in fluid-tight contact with the valve sleeve, (2) providing means for preventing resetting of the manually-controlled valve means until the required measured quantity has been delivered, (3) regulating the rate of delivery by providing apertures in the nozzle wall controlled by a manually - operable sleeve valve, and (4) operating the meter mechanism by a ratchet wheel actuated from two spring - pressed plungers disposed in opposite ends of the measuring chamber so as to be engagable by the measuring piston. The device shown comprises a piston 106 in a measuring chamber 107 defined by an outer sleeve 100 and an inner valve sleeve 105, and a toggleoperated valve 153 actuated by a control piston 148 to open or close the nozzle outlet 154, the arrangement of these parts being similar to that described in the parent Specification. The sleeve 105 is formed with ports 111, 112 arranged to be opened or closed by a tubular valve structure 108 rotatable through 120 degrees by a handle 109 and having conical ends 113, 114 fitting into seatings 115, 123 formed with aligned ports. The seating 115 is a force fit in the sleeve, whilst the seating 123 is fitted with packing rings compressed by a nut 129 and is urged into engagement with the valve member by a spring 137. The nut 129 is formed with a castellated ring 131 receiving a projection 132 on a locking ring 133 which is formed with flats engaging corresponding flats on the seating, this projection also engaging a slot 134 in the sleeve 105 to prevent relative rotation of the parts. The valve member 113 is formed with a port 117 communicating with the interior of the tube 108, and an elongated port 116 communicating with the chamber 122 formed between the tube and sleeve 105, these ports being 120 degrees apart. The valve member 114 is formed with a port 118 at the end of an inlet passage 119 communicating with a passage 175 in the handle to which the source of liquid under pressure may be connected. A second port 120, spaced 120 degrees from the port 118, communicates with the interior of the tube 108, and the chamber 122 is in permanent communication with the passage 119 through passages 121. The operation of the tubular valve is similar to that described in the parent Specification except that the functions of the chamber 122 and the chamber within the tube 108 are interchanged, the latter constituting the " transfer chamber" referred to in the parent Specification. The control piston 148 has as an axial extension 157 formed with a foot 159 engaging one arm of a spring-loaded bell crank lever 160, the other arm of which is adapted to engage in a slot 162 in a flange 163 screwed to the valve member 114 when the piston is moved forwardly by increase of pressure in the chamber 158 prior to and during the delivery of the measured quantity, thus preventing resetting of the valve structure until the pressure drops on completion of delivery. The nozzle wall 145 is formed with one or more apertures 164, six in the form shown, which may be uncovered more or less by a spring-loaded sleeve 165 operable by a lever 166 to vary the rate of delivery. The meter mechanism 178, (see also Group XIX), is actuated through bell crank levers 184, 185 by plungers 180, 181 projecting through the ends of the chamber 107, the levers being connected by push rods 186 to blocks 187 slidable in slots 188 in the base plate of the meter casing and carrying spring-loaded pawls 189 engagable with teeth on a ratchet wheel 190 to effect rotation of a pointer 196 co-operating with a dial graduated in pints. The wheel drives the pointer through a one way clutch, and a resetting knob 199, also operating through a one way clutch, is provided for returning the pointer to zero. Totalising mechanism 179 is operated by a disc 207 on the shaft of the ratchet wheel.