Patent GB-292988-A (GB)
Title: Improvements in apparatus for measuring and dispensing predetermined quantities of liquid by volume
IPC: B67D7/16
Filed: 1927-10-13
Abstract: 292,988. Bell, T. A. June 29, 1927, [Convention date]. Fixed-chamber apparatus.-A kerb-side pump comprises separate, storage-chambers leading to a common measuring-chamber through pipes, each with an upper and a lower valve, the upper valves being normally open and any lower valve opened as required, the serve valve of the measuring chamber being operatively connected with the upper inlet valves to close the upper inlet valve supplying the liquid which is being delivered. An independent meter or counter is provided for each liquid supplied and is operated by a common float means positioned by a lever which opens the supply valves and by means connected with the serve lever. Liquid is supplied by hand-operated pumps 3 through pipes 2 having upper and lower valves 11, 9. The pipes may extend into the measuring chamber and be surrounded therein by hoods 13 which prevent gushing and steady the rise of liquid. A vertically slidable measuring and overflow tube 14 projects into the measuring chamber and telescopes in a pipe 16 connected to a drain valve having ways leading to drain pipes 18 of the separate, storage tanks. The pipe 14 is guided within a hollow casting 23 on which are mounted plates 24 indicating its position. A handle 27 raises or lowers the pipe and is turned to engage pockets 31 on the plates, thus locking the pipe in an indicated position. The serve valve 32 is operated indirectly by a lever 34 which rotates a collar 36 carrying a bar 37 which locks the handle 27. The lower supply valves 9 and their corresponding drain pipes 18 are selectively opened by a lever 41 actuating a shaft 42, the lower end of which operates the valve 17 while it also carries arms 47 actuating the supply valves: The lever 41 is normally locked by a pin 58 pressed into engagement by a rocker 62 actuated by a link and a spring 72; when the overflow tube 14 is in its lowest position a projection on it engages a lever 67 to move the rocker against the spring and release the pin. The lever 41 also moves into display position one of a set of plates 76 indicating the brand supplied.' The stoppage of supply while the serve valve is opened is effected by rods 176 - - 179 carried by the collar 36. The rods 176, 177 pass freely through lugs 181 on levers fixed to the spindles of the valves 11, and act on them through springs when the collar is rotated by the lever 34. Further rotation brings a nut on the rod 178 into engagement with a rocking lever engaging the serve valve stem 196. The fourth rod carries a spring 204 to return the collar &c. into position. A gravity latch 206 holds the lever 34 when it is moved into open position until the latch is lifted again. The quantity recording means, Fig. 9, comprises a float or a pair of floats 91 having a sliding connection . with a guide rod 94 and carrying a striker 96. The rod is rotatable to bring the striker into line with one of the. two sets of trip levers 97, each set having its own counting device 98. The 'rotation is effected by cranked levers 123, Fig. 2, and by a tappet 122 brought into alignment with one of them in accordance with the position of the lever 41. The movement of the serve lever causes a roller carried by the collar 36 to move on and actuate a ramp 129 on a lever 131 which lifts the tappet. To prevent adulteration, the measuring tube 14, when it has been brought to its lowest position to allow the lever 41 to be moved, cannot be raised until the measuring chamber has been discharged. This is effected, as shown in Fig. 9, by a block 168, the nose of which juts over the mouth of the tube in its lowest position and can only be, removed by a finger 161 on the floats striking the lever 162 secured to the block. Fig. 13 shows means additional to or in substitution of this arrangement, for preventing the measuring tube from being completely lowered unless the floats are also completely lowered. The tube 14 has an upward extension slotted to allow flow of liquid and having an aperture engaged by a trip lever 163, thus preventing the tube, being lowered until the lever is swung over by engagement of a finger 161<a> on the floats. Fig. 7 shows a construction of the inlet valves, which are lift valves operated by rotating spindles 226. The apparatus is illuminated by an electric lamp fed by a conductor led through a hollow column. A throttle valve 243 in the discharge hose or between the hose and the serve valve casing may regulate the flow.