Abstract: An apparatus for plugging a pressure piping system includes one or more segments that may be positioned in the system to hold a plug therein. Each segment is held in position by a holding assembly including a plunger slideably mounted within the apparatus and actuable to move the segments to a position for engaging and locking the plug in place. A pin or similar member may be employed to affix the segment to the plunger, and an actuator is threadably mounted within the apparatus and used to adjust the position of the plunger. In the preferred embodiment, the actuator is coupled to the plunger by a threaded stud, with the threads of the actuator and of the stud being cut in opposite directions. The stud threadably engages the plunger such that rotation of the actuator activates the plunger toward and away from the segment.

Abstract: A plug and socket cleanout assembly for fluid transmission lines, storage tanks, and like receptacles comprises a socket connectible to the receptacle and communicating therewith. A plug is removably seated in the socket, there being a relatively tapered interface between the plug and socket. Seal means is seated at the interface. Interengaging means carried by the plug and socket releasably interengage these two members in sealed relation to each other when the plug is seated in the socket. Pressure relieving means mounts in the plug and is manually operable to vent excess pressure from the receptacle.

Abstract: A temporary pipeline capping unit wherein the unit is permanently attached over an opening in a pipeline and includes a capped branch line nipple and an internal element isolating the branch line nipple from the pipeline opening whereby a branch line can be connected to the pipeline by uncapping the branch line nipple and attaching the branch line to this nipple. The internal element is forced by the fluid pressure in the pipeline to a position communicating the subsequently installed branch line with the pipeline opening.

Abstract: Surface ducting comprising a body portion and a removeable lid, the body portion having a base, first longitudinal channels defined by longitudinally extending ribs which are upstanding from the base, and a pair of second longitudinal channels which are arranged one on each side of the first channels and which are each defined by a side wall of the body portion which is upstanding from the base and one of the ribs, the first and second longitudinal channels being of the same height, the first channels being for receiving elongate members, the second channels being narrower than the first channels and being for receiving fixing means, and the lid having integrally formed retainer means for clipping in the second channels.

Abstract: A wind tunnel in which high energy laser beam impingement studies can be ducted such that beam distortion and degradation is substantially precluded. Uniform, low turbulence flow in which thermal blooming, creation of wakes is substantially eliminated is attained by providing an improved elongated cylindrical settling chamber having a gradual turning radius. A transverse aerodynamic window is located in the low velocity flow turning region of the settling chamber which allows the entry of the laser beam and the exhaust of a turbulent sonic free-jet constituting 10 percent of the total fluid flow through the wind tunnel.

Abstract: Ducting for installing below a surface, which ducting comprises a body portion and a lid, the body portion having a first longitudinal channel, a pair of second longitudinal channels arranged one on each side of the first channel, and at least two separate channel insert members which are a removable fit in the first channel and which are for receiving elongate members, the lid having retainer means for clipping in the second channels, each channel insert member having base and side walls, and the channel insert members occupying substantially the entire cross-sectional area of the first channel.

Abstract: A plug for obturating the lift hole of poured concrete drain pipes or conduits. The plug, preferably made of a plastic molding, comprises a generally thin head in the form of a plate and a shank projecting from the lower surface of the plate. The shank has at least two substantially thin fins extending radially from a common centerline, each having a lateral edge engageable with the rim of the hole obturated by the plug. Preferably, the shank is cruciform and is provided with three or more fins.

Abstract: A safe, easy and fast procedure and apparatus for sealing by welded steel plugs branch lines connected to conduits through which gas is flowing, uses a low-carbon steel plug which does not develop cracks on cooling from welding temperature; such plug is arranged to carry a resilient sealing and holding element for locating such plug in place in a cut branch line during welding as well as providing a seal against gas passage during welding. A hard metal die element is provided to properly enlarge and form the cut branch line to accept the plug and resilient sealing and holding element.

Abstract: An improved ascension pipe elbow lid for coke ovens forms a communication means between the coke oven and the volatile products collecting main. The improved structure incorporates a vent which is sealed to prevent the escape of pollutants into the atmosphere.

Abstract: Electrical apparatus includes an outer enclosure, an electrode within the enclosure, and an insulating gas electrically insulating the electrode from the enclosure. A support plate is secured to the outer enclosure, and the support plate has an opening therein. A housing, containing valve means, is secured to the support plate adjacent the support plate opening. An end plate is secured to the end of the housing. The valve means in the housing are capable of being in two positions, a first position preventing the flow of gas past said valve means, and a second position wherein an opening which is through the valve means is aligned with the support plate opening.An opening is formed through the enclosure in the wall portion thereof which is in alignment with the support plate opening. The opening through the enclosure is formed without generating contamination particles within the enclosure and in a manner which minimizes escape of gas from the enclosure.

Abstract: A dump valve assembly for opening and fluid-tightly sealing the drain outlet of a waste tank, the assembly comprisng a rotatable elongated shaft having a handle at its upper end and a first or lower compression plate adjustably secured to its lower end. Disposed concentrically about the shaft are a first and second tubular member, the former having a length less than that of the shaft, and the latter having a length less than that of the first tubular member. Fixedly secured to the lower end of the first tubular member is a second or upper compression plate spaced from the lower plate. Sandwiched and pre-loaded between the upper and lower compression plates is a valve plug made of an expandable material. The shaft is provided with a double-thrust ball bearing which abuttingly engages the upper end of the first tubular member to permit independent rotation of the shaft relative to the former member.

Abstract: An access door primarily designed to provide an insulated entrance to heating, ventilating and air conditoning ducts consisting of a two-pan structure lockably connected together by a simple unfastening means.

Abstract: A sacrificial top tap T and the method of using such a T to tap into a main supply pipe in such a manner that the T may ultimately be plugged and the greater portion thereof removed from the main supply pipe in such a manner as to protect the remaining T portion and the main supply pipe itself from potential damage. The Service T has an axial through bore and a lateral outlet with means near one end of the T for connecting the T to a main and means near the lateral outlet for connecting the T to a service line. Remote from the one end which connects to the service line may be located a sealing element and threads are provided inside the bore near the end which attaches to the main supply pipe for receiving an element for sealing that bore when the service line is to be disconnected. When disconnecting the service line, the Service T interior is sealed against the passage of material from the main and at a point close to the main.

Abstract: Double walled smokestack apparatus is provided in accordance with the teachings of the instant invention having substantially independent, load bearing inner and outer portions which are concentrically disposed to form a thermally insulating air space therebetween. This is achieved according to an exemplary embodiment by providing breeching and top cap arrangements intermediate the inner and outer portions which are configured in such manner to accommodate differential thermal expansion between the inner and outer portions without an attendant coupling of load. In addition, the inner and outer portions are fixedly interconnected proximate a mounting pad location where the moment of force of the inner shell is substantially zero.

Abstract: A sealed lay-in electrical conduit duct which is oil-tight and is comprised of U-shaped sealing collars which telescope into adjacent ends of aligned open ended sheet metal duct sections which are troughs generally U-shaped in cross-section and have their open sides unobstructed throughout their length and closable by a movable sealing trough cover. The sealing collars and duct sections have telescoping bottom and side wall portions, each of which carries elongated cooperating interengaging rib and groove elements which are aligned and extend normally to the longitudinal axis of the duct sections. Each collar member carries a sealing element extending throughout substantially its entire length which covers and seals the line of juncture of the adjacent ends of trough sections held in rigid aligned relation by the collar member.

Abstract: An invention relating to a device adapted to connect a branch line to a main pipeline without interrupting flow of fluid through the mainline. The device includes a pair of tubular, cutter-containing portions and a branch line connection. The device further includes the means to pressure test the branch line prior to the actual cutting or tapping into the mainline.

Abstract: Lengths of lay-in ducts, each in the form of an open top trough having exterior connecting flanges at its ends, are connected together in end to end relation in a run by bolts passed through the flanges. Each trough is provided with a cover which terminates a slight distance short of the trough ends. A joint sealing device common to the adjacent end portions of two connected troughs provides a seal between the device itself and the tops of the adjacent end portions of the trough, between the end portions of the covers and their associated troughs, and between the adjacent end portions of the covers themselves. The device extends across the troughs, and has one end hingedly connected to a supporting bracket which, in turn, is clamped fixedly in position on one of the connected trough flanges by one of the connecting bolts connecting the flanges together.

Abstract: A trap for use with waste water lines for sinks, laundry tubs and the like has a dip portion for retaining liquids to prevent the reverse flow of noxious gases. The lower wall of the dip portion has an opening which is smaller than the interior diameter of the trap and which is adapted to receive a closure plug. A plug for closing the opening is arranged to support a blocking member in the interior of the dip portion of the trap. The blocking member comprises a plurality of flexible fingers which are held in spaced apart relationship on a toroid such that the exterior surfaces of the fingers taper outwardly from the supporting toroid to dimension such that the fingers in combination form a circle which approximates the interior diameter of the trap and the fingers then taper inwardly until the tips of the fingers in combination define a circle of approximately the same dimension as the toroid.

Abstract: Junction elements for pneumatic conveyor systems for use in, for example, power stations include a pair of intersecting arms and an impact plate at the outside of the junction between the arms. The impact plate is reinforced by a reinforcing plate which is held by screw clamps in a frame fixed to the impact plate.

Abstract: A suction pipe for a paper machine having a tapered seat and a cover and an insert mounted in the seat to provide an air tight seal therewith. The insert and the cover being laterally removable from the seat after sufficient longitudinal travel of the cover to free the insert in the seat.

Abstract: An electrical trench assembly having a base pan and vertically adjustable side rails. Said side rails being secured to and carried by said base pan by means of adjusting screws, which are carried by said rails and which screw into threaded connections on said pan. The cover plate for the trench assembly is attached to the side rails by resilient fasteners.