Abstract: A attachment that can be attached to the opening of a container to pressurize the same with a gas. The attachment has a housing which holds a removable cartridge that contains either pressurized nitrogen or CO.sub.2. Extending from the attachment is a button that is connected to a valve which controls the flow of gas into the container. The button and valve are coupled to a spring which functions as a regulator that controls the gas pressure within the container. When the button is depressed, the valve is opened and the gas is allowed to flow into the container. The spring maintains the valve in the open position until the gas pressure overcomes the spring force and closes the valve. Varying the movement of the button varies the spring force and the gas pressure within the container.

Abstract: A portable dispenser for fastening to a conventional carbonated beverage container and providing the convenient dispensing of the contents therein while maintaining the carbonation of the beverage until fully consumed is disclosed. The dispenser is comprised of a body assembly for threadedly engaging a conventional carbonated beverage container, such as one liter, two liter and three liter PET containers, and sealing with respect thereto. The body assembly contains a tube assembly for extending from the bottom of the beverage within the container to the dispenser outlet, with a valve mechanism spring loaded to squeeze the tube closed and manually operable for controllably allowing the flow of the beverage therethrough. The body assembly includes a unique pressure regulator and a CO.sub.2 cartridge in a cartridge holder for providing a source of CO.sub.2 at the regulated pressure to the beverage container.

Abstract: A temperature compensated position sensor which may be used with hydraulic and pneumatic actuators having a magnetic piston and a non-magnetic cylinder is disclosed. The position sensor comprises a pair of Hall effect sensors mounted adjacent a permanent magnet on the outside of a hydraulic cylinder. One Hall effect sensor is oriented upside down with respect to the second Hall effect sensor such that the two Hall effects sensors perceive equal and opposite magnetic fields. The voltage outputs of both Hall effect sensors are amplified, and one is inverted. The resultant voltage signals are added together. Because changes in temperature produce equal changes in the output voltage of each sensor, the summing process cancels out temperature induced variations in the voltage signals. The resultant sum is dependent only on the magnitude of the magnetic field perceived by the Hall effect sensors, regardless of the variation in temperature.