The generator A is provided with a carbide container with perforated base, and water is supplied to it from a delivery-pipe through a scaled overflow. The gas evolved passes through the pipe E to the washer B, which contains a distributor, and thence to the storage gasholder G. There is a sludge-cock F at the base of the generator. From the gasholder the gas passes through the purifier D, charged with heratol, to the service-pipe.
Maker: THE ALLEN CO., 106 VICTORIA STREET, LONDON, S.W.
Type: Automatic; water-to-carbide; contact, superposed trays.
The generating plant made by this firm comprises an equalising bell gasholder, from the tank of which water is supplied through a flexible tube to the top of a water-scaled generating chamber in which is a vertical cylinder containing a cage packed with carbide. The open end of the flexible tube is supported by a projection from the bell of the gasholder, so that as the bell rises it is raised above the level of the water in the tank and so ceases to deliver water to the generator until the bell again falls. The water supplied flows by way of the water-seal of the cover of the generating chamber to the cylinder containing the carbide cage. Larger sizes have two generating chambers, and the nozzle of the water delivery-pipe may be switched over from one to the other. There is an overflow connexion which brings the second chamber automatically into action when the first is exhausted. One chamber may be recharged while the other is in action. Spare cylinders and cages are provided for use when recharging. There is a cock for drawing off water condensing in the outlet-pipe from the gasholder. The gas passes from the holder to the lower part of a purifier with water-scaled cover, through the purifying material in which it rises to the outlet leading to the service-pipe. Purifying material under the proprietary name of the "Allen" compound is supplied. The plant is shown in Fig. 44.
Maker: THE BON-ACCORD ACETYLENE GAS CO., 285 KING STREET, ABERDEEN.
Type: Automatic; water-to-carbide; contact, superposed trays.
The "Bon Accord" generating plant made by this firm comprises an equalising displacement gasholder B immersed in a water-tank A. Alongside the tank are placed two water-jacketed generating chambers G1 and G2 containing cages K charged with carbide. Water passes from within the gasholder through the water inlet- pipes L1 L2, the cock H, and the pipes F1 F2 to the generating chambers, from which the gas evolved travels to the holder B, in which it displaces water until the water-level falls below the mouths of the pipes L1 and L2, and so cuts off the supply of water to the generating chambers. The gas passes from the holder B through the pipe with outlet-cock T to a washer containing an acid solution for the neutralisation of ammonia, then through a purifier containing a "special mixture of chloride of lime." After that through a tower packed with lime, and finally through a pressure regulator, the outlet of which is connected to the service-pipe. There is an indicator I to show the amount of gas in the holder. One generator may be charged while the other is in action.
