Abstract: A flammable fluid carrying tube has one of its ends disposed within a tube coupling which is adjacent a hot surface of the gas turbine engine. A flammable fluid deflector is disposed between the coupling and the hot surface for deflecting, away from the hot surface, any fluid which may leak from the coupling. The deflector includes an axially extending portion disposed against the tube outer surface adjacent the coupling, the axially extending portion including a circumferentially extending tab which fits into a corresponding slot in an arcuate positioning sleeve which is bonded to that surface of the tube facing away from the hot engine surface and which positions the deflector axially and circumferentially. A standard clamp secures the deflector to the tube. The deflector may be used with virtually any standard coupling and replaces expensive concentric tube designs which utilize special couplings and dual seals for redundancy.

Abstract: Flue gases from fuel-fired appliances such as household gas furnaces contain water vapor which may form condensate on the walls of the external flue pipe leading from the appliance. The present invention provides a special flue pipe connection between the internal flue pipe and the external flue pipe. The connection accepts the lower end of the external flue pipe, directs condensate moving down the walls of the external flue pipe to a condensate drain outlet provided in the connection and passes flue gases from the internal flue pipe upwardly into the external flue pipe while isolating those gases from the condensate being drained. In the preferred construction the connection is a collar having an upwardly facing cylindrical recess into which the lower end of the external flue pipe fits and, within the recess, a short pipe section having a lower end connectable to the internal flue pipe and an upper end through which flue gases pass into the external flue pipe.

Abstract: A gas turbine engine is provided with an improved fuel system that features a fuel manifold with a primary and secondary fuel flowpath circumventing a combustor section of the engine. The manifold is formed with a double-walled construction for the purpose of withstanding high temperatures or fires around the combustor section and, additionally, to provide a secondary flowpath for draining any fuel leakage from the manifold. The two walls of the manifold include an inner wall that encloses the primary fuel flowpath through the fuel system. A concentric outer wall encloses the inner wall and protects the primary fuel flowpath. The double-walled system is made possible with a unique manifold assembly utilizing double-walled manifold segments that interconnect fuel flowpaths through fuel injector base sections. When assembled, these parts connect together to form an integral double-walled fuel manifold assembly.

Abstract: High-pressure hydraulic hoses are employed in hydrostatic drive systems to interconnect the transmission and motors thereof. It is imperative that fluid leakage be held to a minimum, or preferably eliminated, particularly where a vehicle employing the drive system is operated in a high-temperature environment, such as a foundry. The hose assembly (13) of this invention provides a high degree of system reliability, relative to hydraulic leaks, and shields a high-pressure hose thereof (14) against damage and heat conduction to hydraulic fluid therein. The hose assembly (13) comprises a flexible high-pressure hose (14), an impervious flexible jacket (17) surrounding the hose in out-of-contact relationship therewith to define a fluid chamber (18) therebetween, and a mounting assembly (22) for mounting the hose (14) and the jacket (17) on a support member (23) to maintain them in out-of-contact relationship relative to each other.

Abstract: A process for forming a double wall heat exchanger. A first ductile tube is placed inside of a second ductile tube. The first tube tightly fitting inside of the second tube. The first tube is the inner tube and the second tube is the outer tube. The combination of the outer tube and the inner tube is finned in a finning apparatus. A helical fin is pressure formed on the outer surface of the outer tube and simultaneously a small helical groove is formed on the inside surface of the outer tube which follows the path of the helical path of the helical fin. The internal pressure being applied to the inner tube causes the inner tube to expand and conform to the inside surface and diameter of the outer tube, with a continuous helical protrusion forming which mates with the internal helical groove of the outer tube, but not entirely filling the internal groove. A helical passageway between the inner and outer tubes is thereby formed. Preferably the inner and outer tubes are made of copper.

Abstract: A light-conductor coupling means for coaxially connecting two optical fibres comprises two cylindrical end members, which contain the optical fibres, and a centering sleeve which receives and centers the end members with a precise fit. The centering sleeve, at its inner surface, and/or the cylindrical end members at their outer surfaces are provided with at least one spiral vent passage. The vent passage permits the air to escape when the two cylindrical end members are fitted together. The vent passage extends over the entire periphery of the inner surface so that the centricity of the arrangement is not detrimentally affected. In order to permit the cylindrical end members to be pushed together with a rapid movement, hollow cavities in the form of annular grooves in which the escaping air is temporarily compressed are also provided.

Abstract: A double-walled finned heat transfer tube is provided for use in heat exchangers. The heat transfer tube includes an inner tube inserted within an externally finned outer tube. The assembly is subjected to a crimping operation which produces radial convexities along the length of the outer tube which serve to lock the inner tube and outer tube together in intimate heat conducting relationship and which produces radial concavities between the inner and outer tubes which serve as leakage channels. The crimping operation also produces grooves in the external finned surface which improves heat transfer between the assembly and an external medium.

Abstract: An assembly for revaporizing liquefied gases. The arrangement is of the running water type and includes a nest of tubes (1) preferably grouped to form panels and connected to inlet and outlet manifolds and over which water is caused to flow. To withstand the corrosion of salt water, an A-G4MC alloy is used and the cross-section of each tube 1 includes two diametrally opposite outer fins 2,3 and inner fins 5. Said tube is produced preferably by extrusion.Application to vaporization of natural gas.

Abstract: A quick connect coupler for fluid transfer is disclosed in which one or both of the mating coupler members is provided with a sleeve which encloses at least a portion of said coupler member adjacent to its coupling end. The sleeve has an inlet for admission of air through its outer wall, a narrow concentric gap between its inner wall and the enclosed coupler member at said coupling end, and a passageway leading from said air inlet to said concentric gap for passage of air over said coupling end. The coupler is adapted for repeated connecting and disconnecting by cooperating releasable coupling means without loss of sterility by virtue of an air shield which is produced over said coupling end by passage of sterile air through the concentric gap.

Abstract: A two-step disconnect hose coupling having a safety vent is disclosed. The coupling features a safety stop and bleed vent combination which restrains the coupling halves and produces a telltale warning before the coupling halves are completely separated. If there is pressure on the hose, the coupling halves are pushed apart thereby engaging the safety stop and allowing a telltale warning (vent bleed-off) to function. The bleed-off vent is enclosed within the coupling and is shielded by the female member when the coupling is in the safety stop position. Complete disconnection of the hose coupling requires two separate rotational movements of the coupling halves relative to each other, and if there is pressure on the hose, the coupling halves will be pushed apart after completion of the first rotation step and the telltale warning will be produced by high pressure discharge through the vent opening as the coupling halves are pushed apart.

Abstract: A tube to composite tubesheet connection system for preventing fluid leakage from the shell to the tube side and from the tube side to the shell side of a shell and tube heat exchanger. Tubes are inserted through and fastened to an inner tubesheet structure. An outer tubesheet structure constituting a plurality of outer tubesheet covers cooperates with the tubes which protrude therethrough and with the inner tubesheet to form a plurality of cavities. The inter-tubesheet cavities about each row or column of tubes are interconnected in a variety of ways. Grooving at least one of the tubesheet structures about its tube holes provides groove-cavities which may be selectively interconnected by networks of holes formed in at least one of the tubesheet structures.

Abstract: An improved lubrication connector for roller conveyors of the type which includes a pair of idlers positioned end-to-end, each idler being rotatably mounted on a hollow shaft through bearing assemblies. The shafts communicate with associated bearing assemblies which are lubricated by forcing lubricant through the hollow shafts. A flexible tube connects adjacent portions of the hollow idler shafts for transporting lubricant from one shaft to the other. The improvement includes one end of the tube being resiliently held in place relative to one of the hollow shafts so that the interior of the tube will communicate with the interior of said hollow shaft, the other end of the tube being sized and shaped slightly smaller than the interior of the other hollow shaft for allowing the tube to be inserted in the shaft yet large enough to prevent lubricant under pressure from leaking between the tube and shaft.

Abstract: A safety shield for a pipe coupling flange comprising an elongated, flexible strip of polytetrafluoroethylene (PTFE) adaptable to be wrapped around the circumference of the flange, and having a length somewhat greater than the circumference of the flange. The elongated, flexible strip of PTFE is of sufficient width to allow the longitudinal edge portions to be folded over the edges of the flanges and against the outer faces of the flange. The longitudinal edge portion is segmented to allow overlap of the segmented sections, and further, the segmented sections have means therein to allow passage therethrough of a PTFE lace for securing the safety shield onto the flange.

Abstract: A heat exchange system having a first tube system of tubes which are interconnected to conduct a first fluid and a second tube system comprising tubes surrounding the tubes of the first system to conduct a second fluid in heat exchange relationship with the first fluid, the preferred embodiment of the tubes of the first system being double walled and shaped to provide a passage for the escape of any fluid leaking from an opening occurring in either the inner or outer wall of the tubes of the first system. In the preferred embodiment, the double walled tubes are concentric tubes spaced radially to permit formation of a spiral groove on one tube, preferably the outermost, which provides a spiral path between said tubes which is open to atmosphere at the ends. Detachable return elbows interconnect adjacent ends of the innermost tubes to effect a continuous path for the fluid therein and the elbows at one end are removable to facilitate cleaning said tubes.

Abstract: A connecting device for use in a gas turbine engine is provided wherein first and second fluid carrying members disposed in a plenum are maintained engaged in a substantially fluid-tight joint. Means are provided for establishing a leakage path from the joint to a location exterior to the plenum with the pressure at the exterior location being lower than the pressure of air in the plenum.

Abstract: A tube sheet construction for heat exchangers, particularly those of the type which utilize immiscible fluid heat exchange media, is formed with a tube sheet base plate and with a plurality of heat exchange tubes extending along at least a portion of their lengths in sealed fluid-tight engagement through the tube sheet base plate. The base plate is provided with a series of internal ducts extending in flow communication with the exterior of the tubes at the portion of the length thereof in sealed engagement with the base plate. The ducts are in flow communication with the exterior of the base plate and permit leaking fluid heat exchange media to be detected and exhausted from the heat exchanger. The tube ends extend beyond the base plate and a tube sheet cover plate extends over the base plate and is rigidly connected thereto with the cover plate having the projecting ends of the tubes fixed thereto by welding or the like.

Abstract: A machine for the automatic butt welding of pipes on tube plates by TIG or plasma process with or without weld metal, or of abutting pipes with TIG or plasma process with internal torch, comprising a control unit for programming the welding parameters according to cycles suitable to the different welding types and a gun which will be centered on the pipes to be welded, supporting a torch which can effect more sequential revolutions, wherein the supplies of the fluids (inert gas, cooling fluid, etc.

Abstract: A fluid conducting swivel joint is disclosed which has a sealing system effective against the leakage of fluids of extreme temperature. The joint consists of two housings mounted for relative rotation about an axis, the housings having a fluid passage therethrough. A first annular sealing chamber, having a seal therein, surrounds the passage, and is located adjacent the passage at the interface between the housings. Each housing has a radial flange at said interface, said flanges spaced apart to define an annular tempering chamber therebetween. A second annular sealing chamber, having a seal therein, is positioned between the flanges outboard of the tempering chamber. A temperature controlling chamber is mounted on one or both of said flanges. One of the housings may have an annular insulating chamber, and insulating members may be used to additionally insulate the second sealing chamber.

Abstract: The specification describes a pipe joint suitable for fluid conducting pipework in which there are inner and outer tubes defining a jacket for fluid heating or cooling medium. The joint comprises a gasket shaped to provide continuous annular seals around the inner tube and the passageways along which heating or cooling medium flows through the joint. The gasket and the pipe flanges with which the gasket cooperates define fluid-receiving channels which are located between the sealing zones around the inner tube and the passages for the heating or cooling medium so as to receive fluid which may leak past those zones and allow it to escape radially outwardly from the joint thus preventing leaked heating or cooling medium from entering the fluid stream in the inner tube, or vice versa.

Abstract: An improved shield for a pipe joint is described that includes an elongated body to be wrapped around a pipe coupling, formed from a strip of pliable fabric. One or more fabric liner strips is disposed within the body, and means are provided for separably connecting its ends together. The liner strips are loosely slidable relative to the body during wrapping of the assembly of the body and liner strips around the pipe coupling. One or more display means for monitoring the coupling integrity are held against the fabric body in assembled relation by a clear envelope means. The display means is formed from a sheet of chemically sensitive material having an indicating means thereon which, upon contact with leakage from the pipe coupling, provides a visual indication of such leakage.

Abstract: A joint between adjacent ends of two pipes arranged to convey liquid under pressure, and which permits relative movement of the pipes, has a first sealing surface of annular form associated with one of the pipe ends and a sealing member supported by the other pipe and movable axially relatively thereto, and having a second sealing surface of annular form which co-operates with the first sealing surface, the sealing member being urgeable away from the first sealing surface by the pressure of liquid within the pipes against a restraining force to provide a clearance between the sealing surfaces which is adequate to permit relative transverse movement of the sealing surfaces to take place without sliding contact, but at the same time provides a high resistance to the flow of fluid between them.

Abstract: A sliding cover, for use in connection with duplicating ink or dye receptacles of duplicating machines, has an outlet for discharging duplicating ink or dye fluid into a duct for distribution in the duplicating machine, and a reservoir formed about the discharge opening for retaining duplicating fluid that may have leaked from the interconnection.

Abstract: A fluid conducting pressure locking O-ring element sealed hose coupling with automatic cocking/locking straight thrust insertion couple features and a push button couple release and safety vent innovation usable after the discharge of pressure within the coupled unit. Said coupling unit consists of tubular conduits that are swivelly coupled to each other by axially overlapping conduits that are axially directionally locked by a hook type flanged abutment pin slidably received radially by a positioning square opening within a fulcrum contained within a boss on the female member and maintained radially slidable by positioning square configurations and spring coils with outward extending arms. Said coils are received and maintained between said pin flanges.

Abstract: A pressure tank connector is described which is formed integral with the cylindrical side wall portion of the tank so that such connector deforms and acts as a safety valve when the fluid pressure within the tank exceeds a predetermined pressure. The deformed connector produces a space between it and an insert member which enables the pressurized liquid or gas within the tank to slowly leak out through such space. In the preferred embodiment, the connector includes a threaded cylindrical connector portion joined by a conical projection portion to the side wall of the tank. The fluid escapes from the tank through a space formed between the threads of such connector and those of an external fitting screwed into such connector.

Abstract: A coupling device for connecting hoses or flexible conduits to each other or to other fittings comprises a male member with an enlarged end portion having a plurality of conical stages and an annular female member or locking sleeve that is retained on the male member and shaped to grip and seal an end of a hose or conduit inserted between the sleeve and the male member.

Abstract: A coupling for joining lengths of underground drainage pipe without inhibiting the flow of water into or along the pipe.

Abstract: A water discharge device for use with irrigation systems, comprising a tubular element formed with female threads at the inside surface thereof and a screw element formed with male threads at the outside surface threof, the height of said female threads being different from that of said male threads, whereby a helical passage is formed along the female and male threads, through which water is moderately discharged under reduction of pressure.

Abstract: A bearing system for relatively rotatable liquid conduits such as a rotating sprinkler head mounted on a fixed riser, including a two-piece casing assembly for shielding operative parts of the bearing from intrusion of external dirt and water-borne abrasive material, while permitting leakage liquid within the casing assembly to bleed outwardly, thereby preventing excessive liquid pressure in the assembly. The illustrative system includes a bearing housing having a central vertical bore and a tubular spindle rotatably mounted in the bore and projecting thereabove for attachment to a sprinkler head. The system includes spaced upper and lower seals between the fixed and rotating parts, and an external helical spring for maintaining the seals under compression, thereby minimizing entry of outside dirt and water-borne abrasive material into the annular space between the spindle and bore.