Abstract: A trauma relief strap assembly has a relief strap with a first strap and a second strap connected to the first strap at two or more connection points along a major longitudinal length of the relief strap. The relief strap further has one or more steps formed as a closed loop between two adjacent connection points. Each step has a longitudinal portion extending in a direction of the major longitudinal length of the relief strap and defined by one of the first strap and the second strap, and a lateral portion protruding laterally from the longitudinal portion and defined by the other of the first strap and the second strap.

Abstract: A cartridge useful as an activator of other systems, and related method of manufacture. The cartridge's casing includes a fuse delimited by placing a plate at each end staked to the casing for fixing the fuse. This configuration permits precise control of the length of the fuse during manufacture, eliminates the need for separate structures in the casing to aid fuse location, and simplifies manufacture and assembly. This configuration supports the fuse lessening stresses that can lead to fractures. A portion of the casing is thinned by a preselected amount to permit fracturing of the casing to launch the projectile. The projectile may be attached to the cartridge casing more simply, e.g. by screw threading.

Abstract: An exemplary firing pin with a release mechanism apparatus at least partially composed of an elastic thermoplastic material. The apparatus includes a rod with a first end portion, a middle portion, and a second end portion. The first end portion includes an integral cage-like element with a plurality of restraining wall elements, which, interiorly, are undercut defining an interior chamber with a volume sufficient to accommodate a cable stop element and define an aperture in communication with the chamber. The aperture is sized to accommodate a cable or the like, but small enough to prevent the stop element seated in the chamber from moving, so long as the restraining wall elements are constrained. The restraining wall elements are generally constrained by a substantially rigid element, such that they cannot deform, flaring open, even if the cable is under tension.