Patent GB-191311883-A (GB)
Title: Improvements in Liquid Measuring Apparatus.
Inventor: MELLERSH-JACKSON WILLIAM JOHN
IPC: G01F3/36
Filed: 1913-05-21
Granted: 1914-02-26
Abstract: 11,883. Jackson, W. J. Mellersh-, [Jones, J. C.]. May 21. Liquid - meters.-Apparatus for measuring liquids comprises a chamber C divided into two compartments A, B, into which liquid is fed alternately by an oscillating valve D and discharged by a similar valve E, as shown in Fig. 1. A motor is used to operate the valves, the motor being controlled by floats in the discharge chamber G or in one or other of the compartments. Liquid is fed to the space d of the valve D from the chamber F, and the space e of the valve E discharges into the chamber G. Each of the valves D, E are made in two parts, for example D<1>, D<2> capable of radial relative movement and forced apart by a spring, as D<4>, to ensure proper seating of the valves. The valve spindles D<3>, E<3>, Fig. 2, are connected by levers and links with a pivoted plate 0. This plate is moved through a rod N<1> secured to a piston N, Fig. 6, arranged within the cylinder M. Steam or other fluid is led to the cylinder M, Fig. 5, through a pipe L, which is provided with a primary cut-off valve K. The passage of the fluid passing the valve K to one or other end of the cylinder M is governed by reversing- valves Q, R actuated by the piston N, and by cut-off valves V, W, responsive to the level of liquid in the chambers A, B. The valve K is operated by the float I in the compartment H of the chamber G through a shaft I<1>, and lever and links I<2>, I<4>, K<1>, Fig. 4. To accentuate the final movements of the valve K, the end of the lever I<2> is made to engage a projection J<1> on the spring-pressed lever J. The reversing-valves Q, R are operated by levers q<3>, r<3>, interconnected by a rod Q<5> and actuated from the lever E' on the spindle E<3> by linkage P, q<4>. In the position shown in Fig. 6, fluid is fed from the pipe L to the lower end of the cylinder M, and exhausted from the upper end. The movement of the piston N causes the closing of the valve Q and the opening of the valve R to admit fluid to the top of the piston N. The valves Q, R are only operated during the final portion of the piston stroke. The supply of fluid to the valves Q, R is controlled by the valves V, W, which are operated by the interconnected floats S, T, through rods S<3>, T<3>, so that the piston and consequently the valves are not moved until sufficient changes of level have occurred in the compartments A, B to allow the floats to act. The oscillating movements of the lever 0 are counted by a counting-train X. To obtain a graphic record of the number of times the chambers fill and empty, an arm E<8>, Fig. 3, attached to the spindle E<3> engages a cam projection Y' formed on a spring needle Y to force the marker Y<2> into contact with a clock-driven record surface Z. The apparatus shown in Fig. 9 may be used for controlling the movement of the piston N. The valves Q, R, V, W, shown in Figs. 2 and 5, are replaced by a single valve R, A which is of the hollow-piston type, the discharge port being placed at L<3> and the two ends of the cylindrical casing R<10> communicating by ports R<16> in the valve body. The enlarged heads R<17> are so arranged that, when the valve is in the mid-position, both ports R<11>, R<12> are closed. The stem R<18> of the valve is connected by a link T<10> to the float actuated arm. The floats S, T are connected as shown in Fig. 2. The single float TA, Fig. 9, is secured to a rock shaft T<11> carrying the arm T<12>.