Patent GB-427806-A (GB)
Title: Improvements in and relating to apparatus for aerating liquids
IPC: B01F3/04
Filed: 1933-10-31
Abstract: 427,806. Delivering measured quantities of liquids. HIGGINSON, G. S., 20, Buckingham Street, Strand, and VREDENBURG, J. C., 2, Charterhouse Square, both in London. Oct. 31, 1933, No. 30231. [Class 106 (v)] [See also Group VI] In apparatus for aerating liquids, of the kind in which the flow of liquid and gas into and out of the apparatus is controlled by a movable plate or disc 3 disposed between upper and lower members 2, 1 respectively, and communicating through ports 47<a>, 57, 60, 62, 69 &c., on to faces in appropriate succession with the ports 4<a>, 32, 33, 34, 35, 44<a>, 45, of passages through the members as the disc is moved into different positions the first portion of the discharge of aerated liquid is effected under pressure, and the remainder under gravity. Passages 4, 5 and an additional passage not shown in the lower member 1 are adapted to be connected to waste, compressed-gas, and water supply respectively. The upper ends of these passages, and of the passages in the upper member 2 also are provided with packing elements 7. The passages in the member 1 are formed in a door 8 surrounded by a sump 9 into which opens an auxiliary waste passage 10. The disc 3 rests on a seating 11 and is rotated by means of a bevel pinion 12 on a shaft 13 having a handle 14 engaging with teeth 15 formed on a bevelled flange 16 extending outwardly from the upper edge of the disc. A stop 17 coacts with another stop in a groove 18 formed in the bearing 19 for the shaft 13 to limit the rotation of the disc to about 120. The lower member 1 is formed with an extension 20 terminating in a downwardly directed discharge nozzle 21, and moulded with an open topped groove 22 sloping downwardly to the nozzle from beneath a chamber having a central aperture 25. Of the ports in the upper member 2 two are relatively large and two are relatively small, one of each being disposed in a circular recess 28 or 29, which recesses are surmounted by vessels 30, 31 respectively. At the upper portions of the ports 33, 35, vertical tubes 36, 37 respectively are secured. The upper member 2 is also formed with a radial extension 38 adapted to coincide with the extension 20 of the member 1. The extension 38 is also provided with a passage 41 terminating in a downwardly directed discharge nozzle 40 leading into an aperture 26 in a fillett 24 covering the groove 22 of the extension 20, and disposed above the outlet 21 of the latter. The port 45 formed in the member 2 may be closed by a plug 46, or remounted by an additional receptacle for liquid. The disposition of ports and passages in the disc valve is such that on rotating the handle 14 aerated liquid is first formed by the inlet of compressed gas to the vessel 30 through one port, and some of the aerated liquid in the vessel 31 is discharged under pressure in the form of fine needle-like jet through the nozzle 21. Simultaneously some of the gas in the vessel 30 is snifted through the port 69 to the waste pipe 4. Continued movement of the handle 14 causes the needlelike jet to be cut off, the gas in the vessel 30, 31 to be momentarily snifted, and finally causes the two vessels to be brought to atmospheric pressure when the handle 14 is in the limit position. At the same time the charge of aerated water in the vessel 31 is discharged under gravity through the nozzle 21 while water from the supply pipe flows into the vessel 30. When the handle is brought back to its initial position, gas is admitted from the pipe 5 to the vessel 30 by way of a port not shown, port 57 and opening 32, entering the water already in the vessel while simultaneously forcing it out therefrom by the annular port 60, port 62, and opening 34 into the vessel 31. Owing to the concentric arrangement of the ports 57 and 60 a thorough mixing of the gas under pressure and the water is effected. Leakages of liquid occurring in the housings 1, 2 collect in the sump 9 and drain through the passage 10. A charge of liquid other than water may be aerated by attaching an open-mouthed vessel, preferably graduated, over the port 45, and interrupting the normal water supply, the disc valve 3 having a corresponding port and passage for allowing the liquid to flow from the open-topped vessel into the vessel 30 when the handle 14 is in its limit position. In this case there is no overplus of liquid to be recovered. By replacing this open-topped vessel with a closed vessel similar to the vessel 30, 31, and employing a modified disc-valve, a mixture of two liquids, for example, of syrup or other liquid and water can be aerated. In this case syrup or other liquid is supplied from a vessel held under pressure to a liquid inlet corresponding with the water inlet already described, leading to the third closed vessel when the disc valve is in the initial position. By controlling the pressure under which the liquid is stored, the quantity supplied to the intermediate vessel may be regulated. On operating the handle, the liquid is first aerated in the intermediate vessel, then mixed with aerated water from the vessel 30, and the mixture is brought into the discharge chamber 31. A small amount of the aerated liquid is then discharged under pressure, gas is snifted from the three chambers, and finally the remainder of the liquid is discharged under gravity. Specification 927/04, [Class 14], is referred to.