Device for mixing gases with liquids

In a device of the character described, a closed-bottom tank for containing a liquid, a cover plate for said tank removably secured to said tank, means mounted on said plate for admitting liquid into said tank, a normally-closed valve unit mounted on said plate for admitting a gas under pressure through said valve unit and into said tank for charging said liquid with said gas, a second normally-open valve unit mounted on said plate for venting excess gas from the upper end of said tank into the atmosphere, means mounted on said cover plate for dispensing the gas charged liquid from said tank, a completely enclosed float disposed in said tank, said float movable upwardly in the tank in response to filling of the tank with said liquid, means for simultaneously opening said first valve unit and closing said second valve unit in response to said upward movement of said float, said last-named means comprising a shaft supported by said plate, a first member of U-shaped configuration having arms pivotally connected to said shaft, a pin supported by said plate, a second member of U-shaped configuration having arms extending in a direction opposite to that of the arms of said first member and pivotally connected to said pin, a second pin extending through the arms of said second member and parallel with said shaft and first pin, and extension coil springs interconnecting said second pin with the base of said first-named member, and means interconnecting said float with the base of said second member, said first valve unit including a plunger supported by one of the arms of said first member, and said second valve unit including a lever pivotally connected to the other arm of said first member.