US2098169A - Soda siphon - Google Patents

Description

Nov. 2, 1937. D. c. STE-WART SODA SIPHON Filed July 20, 1936 Patented Nov. 2, 1937 UNITED STATES PATENT OFFICE SODA SIPHON Daniel 0. Stewart, Astoria, Long Island, N. Y. Application July 20, 1936, Serial No. 91,592

5 Claims.

This invention relates to soda water siphons and, among other objects, aims to provide a greatly improved, compact, easily refillable and light weight metal siphon for carbonated water 5 having an air chamber to prevent over-filling and resultant explosions of the container.

Other aims and advantages of the invention will appear in the specification, when considered in connection with the accompanying drawing,

whereinz Fig. 1 is a central sectional view'of a metal siphon embodying the invention; and

Fig. 2 is asectional 'view taken on the line 2-2 of Fig; 1. v

Practically all soda water siphons now on themarket employ heavy glass bottles, the weight of the quart size being six pounds or more. The glasshas to be of sufficient thickness to withstand the tremendous pressures created in the bottles when the water is charged with carbon dioxide under high pressures. Some of the glass bottles are reinforced by woven strands of piano wire or the like to prevent accidents, due to explosions. Such glass bottles are naturally subject to breakage and have caused many serious accidents. If they are accidentally or carelessly over-filled with Water, the resulting pressure will be excessive and exceedingly dangerous. Moreover, the glass acts as a heat insulator and prevents rapid cooling of the charged water. This invention, therefore, provides a compact metallic bottle made of thin sheet metal capable of withstanding enormous pressures and having provision to prevent over-filling as well as the creation of excessive pressures which would cause explosions. Also, it provides a quart size container weighing only a fraction of the weight of the usual glass bottles. Further, the idea is to enhance the appearance of such bottles and to provide a container which can be opened and easily cleaned by removing the siphon head and tube.

Referring particularly to the drawing, showing one practical embodiment of the invention, the siphon container therein illustrated is composed of a non-corroding metal, such'as Monel metal or stainless steel and is made in sections which are stamped out or otherwise formed and welded together. In this instance, the container is shown as being generally cylindrical. It has a sheet metal base portion l secured to the rounded bottom portion of a lower container section II. These two parts are preferably formed and welded, brazed or otherwise secured together and, afterwards, secured to an upper container section [2. The upper section I2 is shown as having an internal metal vase l3 conveniently. brazed or welded to the lower edge thereof and spaced from the inside walls to provide an annular air chamber l4 between the vase and the outside Wall. The lower portion of the vase has one or more openings l5 and the lower end of the section I2 is adapted to be telescoped within the upper end of the section E! and the two sections welded or brazed together as shown. The upper ends of the section l2 and the vase l3 present an opening for a metal screw threaded filling neck or plug Eli shown as being secured therein by means of a nut I! within the vase screwed on a nipple extension l8 of the neck and securely clamping the upper end of the vase to the top of the section I2. When the parts are thus secured, the entire bottom section I i and the vase portion l3 constitute .the water compartment; while the chamber l4 provides an air pocket or chamber to prevent overfilling.

As is usual, the container is provided with an ordinary siphon tube 59 which carries a gasket 20 at its upper end engaging the mouth of the neck or plug l6 and adapted to be clamped thereon by a screw threaded, valved head 2! of the usual type. The head has provision for the insertion of the usual gas cartridge 22 in a holder 23, the arrangement being such that the cartridge is punctured by screwing the holder on a nipple 25 so that the gas will be discharged through the head and the siphon tube 59 into the container. Incidentally, the volume of the air chamber is shown as being about one-fourth of that of the water chamber or compartment. The CO2 cartridges or tubes contain about 8 /2 grams of gas at 1000 pounds pressure. When discharged into a container holding a quart of water with an air chamber of 8 ounces water displacement, the pressure in the filled container will be reduced to between 35 and 50 pounds, depending upon the amount of absorption of the gas by the water when the charge is completed and the contents well shaken.

In Fig. 1, the container has been filled with water by removing and replacing the head 2| and tube l9 and is about to be charged with gas from the cartridge 22. The water rises only slightly in the air chamber i l due to the static head. above the opening l5. As the gas enters, the container is shaken to hasten the gas absorption by the water and to cause the remaining free gas to enter the opening it and mix with the trapped air in the chamber l4. As the CO2 is admitted it creates a gas pressure causing some of the water to enter the compression chamber compressing thetrapped air in [4 which acts as a buffer. The volumes are such that the final compression pressure of the mixed air and gas in said chamber cannot exceed approximately 50 pounds per square inch and preferably ranges between about and pounds, depending upon the amount of absorption of the gas by the water. This pressure is sufiicient to discharge the entire contents from the container and will never cause an explosion which would occur due to accidental or careless overfilling of an ordinary bottle.

While the air chamber or trap may be produced in various ways, the illustrative example embodies probably the easiest and simplest form to manufacture. Furthermore, the shape of the container is such that it may be made of diestamped sheet metal sections. Since the chamber positively prevents overfilling the container and insures safe pressures, the sheet metal may be very thin. Hence, the weight is greatly reduced and the containers are much easier to handle.

Obviously, the present invention is not .restricted to the particular embodiment thereof herein shown and described. Moreover, it is not indispensable that all the features of the invention be used conjointly, since they may be employed advantageously in various combinations and sub-combinations.

What is claimed is: i

1. A siphon container for charged water comprising a bottle composed of sheet metal sections secured together; an annular vase secured in the upper part of the bottle having an opening at its lower end portion leading into the water compartment and providing an air chamber; and a screw threaded metal neck on the bottle removably to receive a siphon head.

2. A siphon container for charged Water comprising, in combination, a metal bottle; a neck secured to the mouth of the bottle; a tubular member within the bottle projecting downwardly therein from the mouth and providing an air chamber in the upper portion of the bottle and communicating with the bottle near its lower end; and a siphon head having a combined filling and dispensing tube projecting through the neck into the bottom portion of the bottle.

3. A siphoncontainer for charged water comprising, in combination, a sheet metal bottle; a neck removably secured to the mouth of the bottle; a tubular partition within the bottle secured. at its upper end to said neck and providing an annular air chamber in the upper portion of the bottle and communicating at its lower end portion with the interior of the bottle; and a siphon head having a filling and dispensing tube projecting through the neck into the bottom portion of the bottle.

4. A siphon container for charged water comprising, in combination, a metal bottle; an annular vase secured in the upper part of the bottle having an opening near its lower end portion communicating with the water compartment and providing an air chamber; and a neck secured in the mouth of the bottle and having means clamping said vase to the bottle wall around the mouth.

5. A siphon container for charged water comprising, in combination, a substantially cylindrical sheet metal bottle composed of sections; a sheet metal vase axially arranged within the upper portion of the bottle and secured to the inner wall thereof near a joint between two of said sections providing an air chamber communicating at its lower end with the Water compartment of the bottle; and a neck removably secured to the mouth of the bottle.

DANIEL C. STEWART.

Images