This apparatus is made of copper, and consists of one generator with gas dome, two extra large fountains and force pump.

Zwietusch s Carbonating Apparatus 177

The generator has a dome to prevent the marble dust from being carried over into the purifier, and to prevent accidental clogging of the pipe, and also has vacuum valves on all fountains to prevent the collapsing of their interior lining; also compression blow-off cock. Each fountain has a water and pressure gauge. A compression filter, for the arrest of floating substances of the water, is attached to the apparatus, also a pressure regulator and equalizer, used to equalize the pressure on the bottles filled and to reduce the same, no matter how high a pressure the generator contains. A double-acting pump is also attached. The generator is lined with sheet lead, the fountains with rolled block tin. The apparatus has long purifiers.

These illustrations need no comment. The purifier shown in Fig. 183 is a useful and practical contrivance in the purification of carbonic acid gas. The gas is forced through sieves in passing upwards, and gets divided into minute particles, thus presenting a larger surface to the water and consequently increasing the purification facility of the latter, producing a purer gas.

The manufacturer gives the following recommendation: "The use of an injector pump is strongly recommended, especially where power can be had to run it. By its use all the gas in the cylinders is saved If the cylinders are provided with glass water gauges, it is simply necessary to open the gauge cocks and the cocks under the cylinders, and operate the pump until the height of water in the gauge glasses shows that the required amount of water has been injected into the cylinders. If there are no water gauges on the cylinders, the suction pipe of the pump should be placed in a vessel containing a measured quantity of water. After the water in the first cylinder has been drawn off, instead of blowing off the gas remaining in it, open the water-gauge cocks (if the cylinders are supplied with water gauges) and the cock at the bottom of the cylinder, and with the pump fill the cylinder two-thirds full of water. When the water in the second cylinder has been exhausted, open the cock at the bottom of the second cylinder, and allow the gas remaining in it to pass into the first cylinder. Agitate the water in the first cylinder briskly, to absorb as much gas as possible from the second cylinder. Close the cock at the bottom of the first cylinder and open the cylinder inlet cock, to allow gas to pass from the generator to complete the charge. The water gauge cocks should always be open when the pump is being operated, and the cylinder inlet and outlet cocks closed".

The pumps can also be used for pumping water into the generator to displace the remaining carbonic acid gas therein, after the carbonating materials have been exhausted, thereby economizing a large quantity of gas that would otherwise be wasted. The pumps are either double-act-ing or single-acting pumps, differing in style and construction.

Zwietusch s Carbonating Apparatus 180

For larger establishments, or wherever quick and effective work is required, a double-action pump is far better; however, a single-action pump can be used for the same purpose, but it takes longer to do the same amount of work - it works less quickly.

Fig. 182.   Zwietusch's old Purifier

Fig. 182. - Zwietusch's old Purifier.

Fig. 183.   Sectional View of Zwietusoh's Improved Purifier

Fig. 183. - Sectional View of Zwietusoh's Improved Purifier.

Fig. 184.   Zwietusch's Small Intermittent Apparatus

Fig. 184. - Zwietusch's Small Intermittent Apparatus.

Fig. 184 is adapted for a small establishment. It is made of copper, with all the attachment of the later apparatus, but is without an injecting pump.

Fig. 185 is made of copper or iron. One of the Zwietusch's patent purifiers is attached to it. The acid chamber is connected with the generator body.

Fig. 185.   Zwietusch's Upright Generator

Fig. 185. - Zwietusch's Upright Generator.