Abstract: A home beer dispensing apparatus has a keg having a self-contained bag filled with a beer and a pressure system. The pressure system creates a pressurized air space between the keg inner walls and the bag to assist in the dispensing of the beer. The pressure system has a keg one-way air valve mounted to a top wall of the keg to permit entry of pressurized air into the keg. The pressure system has a pressure reservoir mounted in the dispensing apparatus outside the keg and in fluid flow communication with the keg one-way valve. The reservoir stores a charge of pressurized air and supplies at least a portion of this charge to the keg through the keg air valve when the dispensing apparatus is operated to dispense the beer. The reservoir provides a reserved charge of pressurized gas that is on hand to reduce dampening pressure fluctuations during beer dispensing which can result in beer frothing, especially during the early stages of beer dispensing when the air head space in the keg is small.

Abstract: A display system including a display device, a storage means having an array of storage locations each location being adapted to contain data representing a visual parameter of a different pixel of a picture to be displayed, and signal generating means for causing the display device to use the data to display a picture. the storage means is adapted to store data relating to a picture of a larger area than the picture displayed at any one time, the generating means incorporating means for altering the locations in the storage means which are addressed to produce the picture displayed in dependence on the required portion of the larger area picture which it is required to display.