Abstract: Defective sites in the interior enamel coating of an enameled container are repaired. To this end, a bore is provided in the defective site; a sleeve is inserted in the bore; a screw bolt with two threaded ends is passed through the sleeve; a seal is slipped over the threaded end portion of the screw bolt which reaches into the container; a cap nut is tightened thereonto; a cup spring and lock nut are slipped over the threaded end portion of the screw bolt which extends outwardly from the container; and the cup spring and lock nut are tightened by means of a cap nut.

Abstract: A device for locking an insert in a support having a receiving hole or sealing a tubular member such as a pipe, consists of a somewhat bottle-shaped bushing having a cylindrical collar or bushing portion, and a conical portion secured at its narrow end to said collar, an inside screw thread, and a locking ring seated on the cone adjacent to the collar. The dimensions of the collar section of the bushing, the cone and the locking ring are so correlated that bushing and locking ring fit the cross-section of the hole with slight friction when the insert is placed in the hole. Locking of the insert in the hole is effected by inserting a screw bolt or screw tightening means into the insert coaxial therewith. This causes lifting of the insert which in turn effects spreading of the locking ring thereby pressing the same against the wall of the hole.

Abstract: There is provided a joint between a pressure vessel lid and a pressure vessel. The vessel is intended for very high pressures and of the type comprising a thinwalled container which is supported by an external rigid support structure, such that the container provides the vessel tightness and the structure provides the vessel strength. The lid is clamped onto a container rim by means of screws via blocks. An annular shoulder is fixed to the support structure above the container rim. There is an axial play between the blocks and the shoulder. This play is adapted to be eliminated for a relatively low container pressurization at which the yield limit of the container material is reached. The screws merely have to provide the clamping force required to ensure the vessel tightness until the blocks abut the shoulder, whereafter a further container pressurization provides the necessary lid clamping force.

Abstract: The hold-down bolts on the cover of a pressure vessel cannot be loosened until a pressure relief valve has been opened to relieve the pressure in the vessel and to release a safety member positioned over the bolts.

Abstract: A converter bottom-fastening mechanism to be used in a converter construction with a removable converter bottom, a converter jacket and a supporting construction connected to the converter jacket. The bottom-fastening mechanism includes a plurality of rocker-like clamping levers peripherally arranged about the converter bottom and fastened to the converter jacket or to the supporting construction. The levers are axially movable into and out of engagement with the converter bottom. Bracing devices are provided to support the ends of the clamping levers facing the converter jacket with respect to the converter jacket or the supporting construction.

Abstract: An apparatus for sealing the annulus defined between a substantially cylindrical rotatable first riser assembly and plug combination disposed in a substantially cylindrical second riser assembly and plug combination of a nuclear reactor system. The apparatus comprises a flexible member disposed between the first and second riser components and attached to a metal member which is attached to an actuating mechanism. When the actuating mechanism is not actuated, the flexible member does not contact the riser components thus allowing the free rotation of the riser components. When desired, the actuating mechanism causes the flexible member to contact the first and second riser components in a manner to block the annulus defined between the riser components, thereby sealing the annulus between the riser components.

Abstract: Each top cover of carrying and shipping containers designed for nested stacking has a first locking means for securing the cover to the container bottom. A second locking means for connecting each locked container to a similar underlying container positioned in stacked relation is located within the structure of a male component of the first locking means which is mounted in the container cover. Structures of both locking means are provided for rotary and linear sliding modes of operation. The second locking means include cam collars having upper and lower chambers, the latter housing followers which, when actuated by a finger manipulatable means accessible from the top of the containers, project and lock into the upper chambers of similar cam collars of underlying containers.

Abstract: A pressure vessel for storing tennis balls includes a cylindrical open topped receptacle having in its inside upper border a peripheral groove separably engaging an elastomeric O-ring gasket provided with a finger removal tab. A vertical coaxial post is anchored to the receptacle base and axially movably supports for movement between limited raised and depressed positions a coupling member which is spring urged to raised position and releasably locked in its depressed position. A dished cover is coaxially separably connected to the coupling member and has an outwardly downwardly inclined peripheral lip engaging the O-ring when the cover is in raised position to effect an air tight seal. Mounted on the receptacle peripheral wall and communicating with the interior thereof are a pressure gauge, a pressure release and safety valve and a pressurizing check valve.

Abstract: A device for connecting body members of pressure vessels, such as the covers of nuclear reactor pressure vessels, especially to permit the rapid removal and fitting of lids or covers of such pressure vessels, includes a stud bolt to be mounted in one of the members while passing through an aperture in an adjacent member, the bolt being provided with a head and a clamping nut, a metal member adapted to fit between the adjacent member and the head, and means for heating the metal member to cause expansion thereof against the head to allow tightening and release of the clamping nut.

Abstract: A door latch device for securing a door in place closing an opening into an enclosure including an elongated resilient retainer strap having an elongated aperture formed in one end and attachable at its other end to the door, a threaded screw-type fastener with a shoulder formed on its shank having its threaded shank extending through the elongated aperture with the shoulder in abutment with one side of the retainer strap, and a latch plate having a concave depression with a centrally disposed threaded aperture therethrough to receive the threaded shank of the screw-type fastener. The screw-type fastener is held in place in the elongated aperture by a resilient toroidally shaped keeper which fits over the shank of the screw-type fastener on the other side of the retainer strap from the shoulder. The latch plate is attachable to the enclosure adjacent the opening to be closed by the door.

Abstract: A threaded fastener with a central portion separating wider flanges with straight polygonal sides and straight normal flange faces embedded in a plastic. One flange face is flush with the surface of the embedding body to provide a load bearing surface preventing compression of the body.

Abstract: Center cap for the hub of a wheel which is characterized by the provision of elastically deformable joint ratchets at the open end of a cylindrical cap body, the joint ratchets provided with a groove on their outer periphery which receives an annular protruding part of the wheel hub and the joint ratchets having a gradually bevelled surface inclining inwards from the groove on the top of the ratchets and the inside of the cap body is provided with a restrict member to restrict elastic deformation of the ratchets in a radial direction.

Abstract: An end closure for large diameter thin wall pipe employs separate opposed outside contractible and inside expansible assemblies to grip the pipe. A separate yoke member is carried by a closure member of the inside assembly and in turn carries means to actuate a seal between the closure member and the pipe. The external contractible member assembly has a sleeve-like clamp which extends longitudinally beyond the area of the internal expansible member and seal and confines the pipe beyond said areas.

Abstract: A cap assembly for capping the upper ends of well casings of various diameters and associated electrical conduit and providing electrical cable passage therethrough from the conduit into the casing. The cap assembly has an electrical conduit adapter and a cap member with a main dome portion defining a casing chamber of generally circular cross-section and a dome extension portion defining an adapter chamber. The main dome and dome extension portions of the cap member have a stepped series of annular downwardly facing bearing lands of progressively smaller diameter formed therein about the periphery of the chambers for selective seating on the upper end of various sized well casings. The bearing lands have substantially straight sections converging away from the casing chamber. The adapter has an outer taper complimentary to the convergence of the straight sections of the bearing lands for selective seating of the bearing land sections on the adapter.

Abstract: A new and improved pin-type vessel connector wherein a first vessel section includes double connector rings separated by an annular recess which receives a single connector ring of a second vessel section, the connector rings being releasably joined by a plurality of pin-type connectors which include radially aligned openings in each of the rings for receiving a tapered pin, one portion of the opening in the single ring connector being partially tapered to provide a full bearing engagement against the tapered pin under load conditions. Positioning elements are mounted with the single connector ring for positioning the single connector ring uniformly within the annular recess between the double rings in spite of changes in the circumference or roundness of the single ring.

Abstract: A cover plate for a carburetor having a gasket interposed between the plate and the carburetor body which comprises a plate of rectilinear shape with a bottom peripheral surface to seal against the gaskets on a carburetor body and having a central upstanding boss on the outside of the plate with tapered ribs extending from the top of said boss to the corners of the plate. A screw with a tapered head passes through a tapered opening in said boss and exerts pressure on said ribs to urge the entire plate in tight contact with the carburetor body.

Abstract: A mounting cover for enclosing electronic components or the like utilizes the side walls as compression members for receiving the compressive forces produced by the screw fasteners used to mount the cover to a surface.

Abstract: Described herein is a structure for attachment of two parts of a valve structure in a pressure-tight leakproof relationship, which employs a minimum number of parts and may be quickly disassembled, but which is nonetheless strong, rugged, and durable. This structure includes a first member having two pairs of spaced-apart lugs protruding in a direction generally parallel to the axis of an opening in the first member. A second member is provided which extends into the opening and includes two ears, each ear being adapted for placement between two lugs. The lugs are provided with matching transverse holes, whereby a bolt or pin may be placed through one lug of a pair, then over a portion of an ear, then into the second lug of the pair for securing the two members together in a predetermined relationship. Means are provided for detection of internal pressure in the valve to prevent disassembly thereof prior to removal of the pressure.

Abstract: When electrical equipment is used in a hazardous atmosphere, it must be enclosed in an explosion proof enclosure so an electrical spark cannot cause a fire or explosion. The present invention provides a means for assuring that an explosion proof enclosure which has been opened for inspection, repair or adjustment of the electrical apparatus is restored to its original condition. To this end, a visually inspectable locking means is provided. The locking means can be engaged only when the enclosure compartment and its associated cover are restored to their original explosion proof relationship. The locking means does not exert any distorting force on the mating threads of the enclosure.

Abstract: A protective shield for a pressure vessel which includes a ductile member for absorbing kinetic energy released if the pressure vessel fails by a portion of the pressure vessel breaking-off and tending to fly away from the remainder of the pressure vessel; the ductile member or a portion thereof undergoing substantial deformation, but not breaking, when loaded by the portion of the pressure vessel which tends to fly-away when the pressure vessel fails.

Abstract: A locking top and bottom container comprisesA. an upright cylindrical body having open upper and lower ends surrounded by rims,B. upper and lower discs closing and extending across said body upper and lower ends, respectively,C. retainer means extending axially within said body and having upper and lower connections to said upper end lower discs respectively,D. at least one of the connections to one disc being a threaded connection allowing rotation of the one disc in a tightening direction about said axis to peripherally tighten against one end rim of the body, and disc rotation in a loosening direction about said axis to loosen the one disc from the body allowing access to the body interior.

Abstract: A reusable closure for containers having an opening in a surface thereof. A seal of size and shape sufficient to cover the opening in the container and having a bore therethrough is positioned such that the bore generally is aligned with a portion of the opening including opposed edges thereof. A threaded cap has a diameter less than that of the bore, whereby threaded engagement between the cap and opposed edges of the opening is achieved. Tightening the cap holds the seal firmly in place, thereby maintaining a positive closure of the opening. The seal may abut a lip of the container thereby restricting lateral movement of the cap. The seal and the threaded cap may be separate elements or of integral construction. The invention is particularly suited for use in containers having a convenience opening known as pop-top cans.

Abstract: A vessel is formed with a peripheral flange upon which a lid is positionable to form a chamber within the vessel. The lid and flange are provided with juxtaposed grooves carrying a sealing member therebetween and a locking strip around the periphery of the pressure vessel for engagement with bolts secured to the lid.

Abstract: An arrangement for mounting plural covers on opposite surfaces of one or more planes employs elongated fastening nuts for receiving mounting bolts from opposite directions via the cover tops, formed with a pair of grooves which permits each nut to mate with a notch in a wall of one of the covers so that its rotational movement is restrained while housed therein.