Abstract: An insulated pipe enclosure for use above ground includes opposed, internally insulated, generally C-shaped, thin-walled base and cover sections, which are interconnected end-to-end by overlapping one section with the next, each cover and base being interconnected by screws in flanges extending outwardly from each side of the cover and base. The pipes in the enclosure rest on vertically extending supports, which are embedded in the insulation of the base sections.

Abstract: A replacement transition duct assembly for a jet engine comprised of a plurality of complementary louvered sections having joining ends that are assembled together about the engine by means of a novel bracket. The bracket is formed with a spaced array of louvered segments adapted to interfit with and receive the joining ends of the replacement duct sections, and includes an offset element to which the joining ends are secured. When the joining ends are secured to the bracket, the bracket provides an effective seal between the replacement duct sections, presents a minimum impediment to the flow of exhaust gases, and completes the integral formation of the replacement transition duct assembly.

Abstract: A connector is used to join sheets of fibrous insulation into a duct. The connector includes a base plate to which a plurality of guide flanges and penetrating flanges are connected. The penetrating flanges are spaced from and parallel to the guide flanges, and both the penetrating and guide flanges project from the base plate. In use, the guide flanges bear against the outer surface of the insulating sheet while the knife-like edges of the penetrating flanges penetrate and mesh with the longitudinal fibers of the insulation.

Abstract: Operation of a plasma device such as a reactor for controlled thermonuclear fusion is facilitated by an improved bumper wall enclosing the plasma to smooth the flow of energy from the plasma as the energy impinges upon the bumper wall. The bumper wall is flexible to withstand unequal and severe thermal shocks and it is readily replaced at less expense than the cost of replacing structural material in the first wall and blanket that surround it.

Abstract: A preformed molded fiberglass reinforced plastic repair sleeve for use on a marine or other submerged concrete pile and a method of applying the same. The sleeve is provided with at least one vertical seam consisting of inside interlocking reentrant bends which together establish an interlocking tongue and groove joint. The joint is maintained effective by self-tapping screws which are in engaged relation with steel closure clips or strips. The sleeve after assembly is centered about the pile undergoing repair and the continuous space which exists between the sleeve and the pile is filled with a suitable grout which, when hardened, encompasses the internal or inside portions of the joint under pressure and prevents unfastening of the seam.