Abstract: An integrated power unit for use in a bed of a pickup truck. A lower housing is sized to fit between the rear wheel wells of the pickup truck, and opposed upper housings extend over respective opposed sidewalls of the truck bed. The opposed upper housings are adjustable with respect to the lower housing, so that the integrated power unit may be used with various makes and models of pickup trucks. The lower housing contains an internal combustion engine for generating mechanical power, an alternator and electrically driven compressors. Ducting and baffles facilitate air flow and cooling in the lower housing. A fuel tank is formed by one of the upper housings, and a control panel is located in the other upper housing. Connections for electrical power and regulated and unregulated pneumatic power are available at the control panel.

Abstract: An ejection port gun lock includes an elongated body and a slide member which is slidably affixed to the body to move along a slide path (with the slide path being oriented generally parallel to the length of the body) between an engaged position within a gun ejection port and a disengaged position in the ejection port. A locking member is provided on the body adjacent to the slide path, and the locking member is movable between a locked position wherein it extends into the slide path to engage the slide member, and an unlocked position allowing motion of the slide member.

Abstract: A choke coil [e.g exceeding about three (3) henries] placed in parallel with the A/C line, that is, preferably across the A/C line's “hot” and “common” lines, quenching the reflected signal (or back emf) that is developed when any power amplifier or other load places it's demands upon the incoming A/C power line. Due to its electromagnetic characteristics, the choke tends to provide a momentary high current source of energy when needed by, e.g., a power amplifier (or other appropriate load) when transient demand is called for. The invention's parallel choke approach, due to the fact that it must be magnetically charged by electricity [either from the A/C line or back electromotive force (emf) from it's load] tends to have a reversing effect on this signal, preventing, eliminating or at least substantially reducing it's presence on the A/C line, thereby providing a greatly enhanced A/C power line signal quality for the load.