NOVELTY - The device has a chemical supply chamber (41) that defines a volume to contain a chemical supply. The chamber includes an element (30c) for exposing a catalyst contained within the chamber to the chemical supply in ON and OFF states according to a self-adjusting duty cycle, such that the gas is generated and output in an orientation-independent manner. The element is positioned relative to the device main portion (78) with the complementary features in contact with one another, when the pressure internal to the chemical supply chamber is above a first threshold.    USE - Device for generating gas e.g. hydrogen gas delivered to fuel cell for electricity-consuming device such as MP3 player, remote controlled car, portable computer, military electronics, industrial electronics e.g. printing presses, and consumer electronics e.g. cellular telephones and personal digital assistants (PDA).    ADVANTAGE - The safety of the gas generating device can be improved. The long lifespan of catalyst can be exhibited to generate gas from chemical supply based on the self-regulating features. The gas generator is provided with pressure relief valve for reducing the pressure of the gas storage chamber or chemical storage chamber if pressure in the respective chamber exceeds a predetermined threshold. Since the mechanical solution is exposed to the catalyst in a chemical supply chamber, the cost of the device can be reduced. The chemical supply can be effectively prevented from flowing through to the gas storage chamber. Since the certain amounts are provided to accommodate the level of pressure in the gas storage chamber, so that the increased or decreased gas flow rate is maintained. The user error can be effectively prevented.    DETAILED DESCRIPTION - Multiple pairs of complementary features are provided to expose the catalyst to the chemical supply so that the chemical supply is removed from the catalyst in parallel with each other. A gas permeable, liquid impermeable membrane (36) is provided to separate the gas storage chamber (40) from the chemical supply chamber. An INDEPENDENT CLAIM is included for gas generating method involves enabling the gas to pass from the chemical supply chamber to the gas storage chamber via gas permeable, liquid impermeable membrane in the orientation-independent manner. The element is enabled to change position or orientation includes exerting a force on the element through use of a forcer positioned in the reference pressure chamber (26).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of gas generating device.    Reference pressure chamber (26)    Element (30c)    Gas permeable, liquid impermeable membrane (36)    Gas storage chamber (40)    Chemical supply chamber (41)    Device main portion (78)