Abstract: An ammunition case includes an elongate interior cavity for receiving a propellant and a projectile and extending along a longitudinal axis between a top end and a bottom end, and a bottom corner of the cavity having a reversed radius design supported by a shaped base.

Abstract: A packaged electrical component includes an electrical component having at least two electrical leads, the electrical component generating a gas during operation, and a package enclosing the electrical component with the leads extending from the package, the package consisting of at least one selectively permeable material having a relative high permeability to a gas generated within the package during operation of the electrical component and a relatively low permeability to at least one other fluid, such as water, that may be present inside and/or outside the package.

Abstract: A package for an electrical component that generates a gas during operation includes a selectively permeable body that allows the gas generated within the package to escape while preventing the escape of desired fluids from the package and the entrance of undesired fluids into the package. In a double layer capacitor according to the invention, the body may be a polymeric material, such as silicone rubber or polypropylene, through which carbon dioxide permeates relatively rapidly but through which water vapor permeates relatively slowly. A package including a container and an attached cover includes a resilient member disposed adjacent the periphery of the cover for dissipating forces that might be applied to an electrically insulating seal in the cover through which an electrical terminal passes.