Abstract: A probe assembly for inserting a probe into a flexible or semi-rigid object is provided. The probe assembly includes an aseptic connector for coupling to the object, a probe sheath that extends longitudinally from the aseptic connector, and an actuator for deploying the probe within the object. The probe sheath has a plurality of concentric sheath elements and an inner longitudinal volume that is configured to permit longitudinal movement of the probe within the probe sheath. The actuator moves the probe longitudinally within the probe sheath by telescoping a first sheath element of the plurality within another sheath element of the plurality such that the probe is moved to a position sufficient to measure at least one parameter within the object.

Abstract: The invention relates to a rotary evaporator comprising a rotary drive having a hub and a clamping insert with a sleeve-like basic shape, in particular a clamping sleeve, for the clamping of a steam leadthrough formed as a hollow glass shaft in the hub of the rotary drive, wherein the clamping insert has a longitudinal axis and a first and a second axial end, wherein the clamping insert has two clamping sections which are arranged spaced apart from one another in the longitudinal direction and which each have an outer cross-section tapering toward the first end and of which the clamping arrangement arranged closer to the second end has a larger maximum outer cross-section.

Abstract: Tube for pumping a space between two tiles, comprising a metal end-piece 9 and a glass tube 25 bonded together via a glass-to-metal seal 26; the metal end-piece 9 has shoulder means 3. Such a tube is especially intended to be fitted onto plasma displays or field emission displays. This tube is inexpensive and allows rapid and precise handling and fitting.

Abstract: A ramp-lock quick-connect fitting is adapted to be placed between conventional type fittings on pipes and tubes, such as quartz pipes and synthetic resin tubes used in chemical processing systems for semiconductor device fabrication. The quick-connect fitting includes a first coupling member having a pipe receiving section adapted to receive a conventional fitting on a pipe, and a ramp support section with a pair of spiral ramps formed therearound. The quick-connect fitting also includes a second coupling member that sealingly engages the first coupling member. An extension portion of the second coupling member is adapted to receive a conventional fitting on a tube. A locking collar is movably engaged with the second coupling member and has a pair of lock members disposed on an interior surface of the collar that slidably engage with the spiral ramps when the collar is rotated around the ramp support section of the first coupling member.

Abstract: A joint assembly for connecting two ceramic material tubes has a cup-ball interface. One of the tubes has at a first end a cup shaped member, and the other tube has at a first end a ball shaped member adapted to be received in the cup shaped member. The ball shaped member and the cup shaped member define the cup-ball interface. The cup shaped member is provided with a gas feed channel discharging at a first end into an annular groove at the cup-ball interface. At the other end, the cup shaped member is connected to a conduit outside the cup shaped member. The conduit is connected to an inert gas source having a pressure above atmospheric pressure.

Abstract: A ramp-lock quick-connect fitting is adapted to be placed between conventional type fittings on pipes and tubes, such as quartz pipes and synthetic resin tubes used in chemical processing systems for semiconductor device fabrication. The quick-connect fitting includes a first coupling member having a pipe receiving section adapted to receive a conventional fitting on a pipe, and a ramp support section with a pair of spiral ramps formed therearound. The quick-connect fitting also includes a second coupling member that sealingly engages the first coupling member. An extension portion of the second coupling member is adapted to receive a conventional fitting on a tube. A locking collar is movably engaged with the second coupling member and has a pair of lock members disposed on an interior surface of the collar that slidably engage with the spiral ramps when the collar is rotated around the ramp support section of the first coupling member.

Abstract: A device for connecting two bodies, especially a quartz body and a metallic body, which assures with few and simply formed components a high sealing ability at high temperature differences and at very low pressures and makes possible an easy assembly and disassembly. The device for the vacuum-tight connecting of two bodies of different materials, each of which has an essentially tubular end section (20, 30) and in the connected state of which the tubular end section (30) of the first body surrounds at least partially the end section (20) of the second body, includes an intermediate conduit (13) for intermediate suction removal of gases and is formed between the tubular end sections (20, 30) of the bodies with two seals (100, 150) which seal off the intermediate conduit (130).

Abstract: A system for coupling a ball fitting connected to a first tubing to a socket fitting connected to a second tubing. A first coupling forms an aperture having a diameter that is larger than the diameter of the ball fitting, and receives the ball fitting. The first coupling forms an annular race, with an annular surface disposed between the annular race and the aperture. First split ring pieces are assembled into a first ring that forms an aperture having a diameter that is smaller than the diameter of the ball fitting, and receives the first tubing. The first ring forms an annular ridge that engages the annular race, and aligns the first split ring pieces. The annular surface applies uniform axial pressure to a first surface of the first ring. The first ring has a second surface opposing the first surface that applies uniform axial pressure to a back portion of the ball fitting.

Abstract: A ramp-lock quick-connect fitting is adapted to be placed between conventional type fittings on pipes and tubes, such as quartz pipes and synthetic resin tubes used in chemical processing systems for semiconductor device fabrication. The quick-connect fitting includes a first coupling member having a pipe receiving section adapted to receive a conventional fitting on a pipe, and a ramp support section with a pair of spiral ramps formed therearound. The quick-connect fitting also includes a second coupling member that sealingly engages the first coupling member. An extension portion of the second coupling member is adapted to receive a conventional fitting on a tube. A locking collar is movably engaged with the second coupling member and has a pair of lock members disposed on an interior surface of the collar that slidably engage with the spiral ramps when the collar is rotated around the ramp support section of the first coupling member.

Abstract: A ramp-lock quick-connect fitting is adapted to be placed between conventional type fittings on pipes and tubes, such as quartz pipes and synthetic resin tubes used in chemical processing systems for semiconductor device fabrication. The quick-connect fitting includes a first coupling member having a pipe receiving section adapted to receive a conventional fitting on a pipe, and a ramp support section with a pair of spiral ramps formed therearound. The quick-connect fitting also includes a second coupling member that sealingly engages the first coupling member. An extension portion of the second coupling member is adapted to receive a conventional fitting on a tube. A locking collar is movably engaged with the second coupling member and has a pair of lock members disposed on an interior surface of the collar that slidably engage with the spiral ramps when the collar is rotated around the ramp support section of the first coupling member.

Abstract: A pressurized fluid circulating assembly includes a body made of non-metallic, brittle material. At least two apertures formed by internal threads are disposed in the body. First coupling members each include a first externally threaded male portion that can engage the threads of one of the apertures, a second internally threaded female portion and a head with multiple flats. Second coupling members each have an externally threaded male portion that can engage the second threaded portion of one of the first coupling members. A movement-inhibiting member is disposed at a fixed position near at least one flat of each of two of the first coupling members to prevent their rotation. A device may employ a movement-inhibiting member having a size and shape so as to be adapted to be received at a fixed position near at least one flat of each of two of the first coupling members when threaded into engagement with the apertures, thereby preventing rotation of the first coupling members.

Abstract: A method and apparatus for connecting a tube to a surface that creates a dead volume seal. The apparatus is composed of three components, a body, a ferrule, and a threaded fitting. The ferrule is compressed onto a tube and a seal is formed between the tube and a device retained in the body by threading the fitting into the body which provides pressure that seals the face of the ferrule to a mating surface on the device. This seal can be used at elevated temperatures depending on the materials used. While the invention has been developed for use with micro-machined silicon wafers used in Capillary Gas Chromatograph (GC), it can be utilized anywhere for making a gas or fluid face seal to the surface of a device that has near zero dead volume.

Abstract: A quartz tank for wet semiconductor wafer processing includes one or more ports extending through the tank for the exchange of fluids with the tank. The openings may be aligned with a T-shaped quartz stem having an enlarged end retained on the interior side of said quartz tank in sealing abutment therewith. The lower end of the quartz stem may have external threads to abut with a suitable union. The union may include a nut having a reduced diameter lower end to engage an enlarged end of the tubing member connected to the bottom of the quartz stem. An o-ring seal may be sandwiched between the tubing and the lower end of the quartz stem. The nut may be formed of a carbon-fiber reinforced fluorocarbon material such as perfluoroalkoxy.

Abstract: A method for producing a microfluidic coupler includes the step of producing a first mask on a top surface of a wafer. The first mask defines an insertion channel pattern selected to correspond to the cross sectional shape of a capillary. The wafer is etched through the first mask to form an insertion channel. A second mask is produced on a bottom surface of the wafer. The second mask defines a subchannel pattern selected to match the diameter of the bore of the capillary. The wafer is etched through the second mask to form a subchannel connected to the insertion channel. The capillary is inserted into the insertion channel such that the capillary is in fluid communication with the subchannel. In one embodiment, a capillary guide is secured to the wafer to facilitate insertion of the capillary into the insertion channel. The capillary guide has a tapered guide channel aligned with the insertion channel for guiding the capillary into the insertion channel.

Abstract: A joint body containing a ceramic member composed of a main body and a disclike projection projected therefrom and a ceramic cylindrical body. The disclike projection is inserted inside the cylindrical body, and a relative density of the disclike projection is higher than that of the cylindrical body. The cylindrical body is composed of a straight portion not contacted with the projection and having a uniform inside diameter, a diameter-expanded portion in contact with the projection and having the largest inner diameter, and a tapered connecting portion bridging the straight portion and diameter-expanded portion. A difference between the inner diameter of the straight portion and that of the diameter-expanded portion is 0.05 mm to 0.6 mm.

Abstract: A pipeline is made by joining a number of pipe sections, each of which includes an inner pipe structure and an outer pipe structure. The outer pipe structure, which may be zinc plated or encased in an protective elastomeric material, includes mating couplings at each end to fasten similar sections together end to end. The inner pipe structure includes a hole extending throughout the pipeline and means for sealing around the hole at each joint. The inner pipe structure is resiliently mounted within the outer pipe structure. The outer pipe structure of each pipe section extends in both directions past the ends of the inner pipe structure.

Abstract: A clamp for securing ground-glass joints between first and second tubes, the first tube having a shoulder located inward of its end, intermediate the ground and unground portions thereof, adjacent the ground joint, and the second tube having an enlarged lip located at its end adjacent the ground joint and the shoulder of the first tube. The clamp has an mounting portion and an attaching portion having first and second parts for accommodating the shoulder and the enlarged lip therebetween, followed by a releasing portion. The mounting portion connects the first and second parts and has forward ends extending substantially symmetrically along a longitudinal axis of the clamp. The forward ends of the mounting portion are biased toward one another by the clamp. The first part of the attaching portion is an attaching collar for partially fitting around the circumference of the first tube adjacent the shoulder rearwardly of the transverse axis.

Abstract: A connectorized capillary and in-line flow cell system which greatly expedites the construction of capillary zone electrophoresis (CZE) and other separation instrumentation. A capillary is mounted within a cavity formed in a body, and a mechanical fastener is positioned about the body. The inner diameter of the fastener is less than the outer diameter of the body, so that the connector may be firmly coupled to any system component having a corresponding portion adapted to accept the fastener. The connectorized capillaries thus permit permanent or semi-permanent attachment to various in-line flow cell devices such as detectors, valves, buffer reservoirs and the like. For example, an in-line conductivity detector is assembled by connecting a conductivity meter to the opposing ends of the flow cell body. Annular sensing surfaces can also be provided within the cell.

Abstract: A microcolumnar analytical apparatus having a flow gating interface system for interfacing a first microcolumn and a second microcolumn is provided. The apparatus includes a flow gating interface, a first fluid conduit (e.g. a liquid chromatograph microcolumn) of a fluid sample, a flush liquid supplier, and a second fluid conduit (e.g. a capillary electrophoresis microcolumn) for analysis of the effluent fluid sample from the first fluid conduit. The flow gating interface includes a first microcolumnar section, a second microcolumnar section, and a channel. The channel, having an inwardly facing wall, encloses at least a portion each of the first microcolumnar section and the second microcolumnar section for conducting a flush fluid flow past the outlet end of the first microcolumnar section and the inlet end of the second microcolumnar section.

Abstract: A connector for connecting a first fluid-bearing conduit to a second fluid-bearing conduit, thereby providing a substantially leak-free fluid communication between the first and second fluid-bearing conduits. The second fluid-bearing conduit is located in a receiver and communicates with a receiving port. A frustoconical surface on the receiver defines the receiving port. The connector includes a support, a biferrule, and a biferrule compression assembly. The biferrule is provided with a forward end having a spherical head portion, an aft end having a frustoconical tapered portion, and a bore therebetween for receiving the first fluid-bearing conduit.

Abstract: A capillary column connector assembly includes a pair of body members fabricated from a resilient, inert ceramic having high compressive strength. Each body member has an inwardly tapering longitudinal throughbore within which the end of a capillary column can be inserted by press-fitting. A split sleeve holds the two body members in mutually facing alignment with inner end surfaces in compressed mutual contact. The inner end surfaces are slightly radiussed in order to deform upon compression and provide a fluid-tight seal surrounding the junction between the inner ends of the longitudinal bores, thereby eliminating the need for any separate sealing gasket.A mechanical assembly comprising an inner spool, an outer housing, a spring, and a bearing-mounted support provide axial compression forces tending to urge the ceramic body members into mutual facing contact with the radiussed surfaces deformed.

Abstract: A quartz pipe joint of the present invention can be used in a connection of, for example, a quartz pipe and a quartz pipe, or a quartz pipe 7 and a synthetic resin tube. The quartz pipe joint A has a joint body having a tapered pressing face a cylindrical sealing member 33 having a tapered receiving face 33, a lock ring which can deform to increase its diameter and deform to reduce its diameter and which can be fitted into an annular groove of the quartz pipe and a nut. When the lock ring fitted into the annular groove and the sealing member fitted into the quartz pipe are clamped by threadedly connecting the nut to the joint body, the sealing member is deformed to reduce its diameter by the function of the pressing face and the receiving face, so as to closely contact with the outer peripheral face of the quartz pipe, thereby exerting sealing properties. The lock ring engages with a groove wall of the annular groove to prevent the quartz pipe from slipping off from the joint.

Abstract: A connectorized capillary and in-line flow cell system which greatly expedites the construction of capillary zone electrophoresis (CZE) and other separation instrumentation. A capillary is mounted within a cavity formed in a body, and a mechanical fastener is positioned about the body. The inner diameter of the fastener is less than the outer diameter of the body, so that the connector may be firmly coupled to any system component having a corresponding portion adapted to accept the fastener. The connectorized capillaries thus permit permanent or semi-permanent attachment to various in-line flow cell devices such as detectors, valves, buffer reservoirs and the like. For example, an in-line conductivity detector is assembled by connecting a conductivity meter to the opposing ends of the flow cell body. Annular sensing surfaces can also be provided within the cell.

Abstract: An easily-assembled, heat resistant connector for releasably joining end portions of three capillary tubes for use in chromatography without interrupting flow or interfering with chromatographic results comprises a main body, and a glass insert which has first, second and third hollow legs that are connected together at a central portion, and a connector that connects each leg of the glass insert to a capillary tube. Each leg of the glass insert extends outwardly from the central portion towards an open end portion, and each leg has an inboard bore with a taper that receives and end portion of one of the capillary tubes. The taper is wider near the open end portion of the leg and narrower near the central portion. The connectors are mounted on the main body and a sealing ferrule is provided in each connector for making a seal between the capillary tubes and the legs of the glass insert.

Abstract: High temperature ceramic nut of aluminum oxide for use in coupling a flared tube to a flare fitting.

Abstract: The invention refers to a process and an arrangement to connect and seal tubes (2, 4) made of glass, metal or ceramic materials, that are joined to form flue-gas pipes. The sealing system according to the invention is distinguished by the fact that it can be used for exhaust gas pipes as well as for diminished cross-sections for chimneys, for example, since the sealing material is used in such a way that the overlapping pipes (2, 4) are connected in gas-tight manner even in the case of varying pressure conditions, and that the sealing material (8) is sufficiently resistant to acid, water and temperature to be used in the removal of hot, acid gases. In a preferred form of construction, the pipes (2, 4) are fixed together before applying the anorganic sealing material (8). The pipes are either fixed by punctually applied, quick-setting adhesive (6) or secured together by a pipe clamp (14) attached at the circumference of the pipes.

Abstract: An inline valve includes a glass body having an upwardly open bore with a tapered seating surface, and colinear inlet and outlet ports having passages intersecting the seating surface. Fluid flow between the ports is regulated by a valve member whose stem has a tapered tip conforming substantially in shape to that of the seating surface. The tip has a relatively soft surface which can conform to irregularities in the seating surface when the valve is closed. An annular seal or an extensible boot prevents fluid leakage along the valve stem.

Abstract: A heat-treating apparatus has a reaction vessel being adapted for performing a heat process for a workpiece to be treated and having a joint pipe portion and an outer pipe jointed to the joint pipe portion and of the reaction vessel. A sealing member is disposed between the outer pipe and the joint pipe portion. The sealing member has a relatively soft core member and a film harder than the core member. The film is disposed on the surface of the core member and has a heat resistance and a chemical resistance. Since the core member of the sealing portion has flexibility, it easily deforms corresponding to the shape of the sealing portion. The film provided on the core member prevents the sealing member from thermally adhering to the sealing portion and from thermally deteriorating.

Abstract: High temperature ceramic nut of aluminum oxide for use in coupling a flared tube to a flare fitting.

Abstract: A wear resistant pipe elbow is provided having a seamless inner liner with an upstream beveled end directing fluid flow away from the interior surface of the pipe elbow, thereby protecting the interior surface of the pipe elbow from abrasive particles contained in the fluid, and a downstream beveled end, which assists in directing fluid flow away from the inner surface of downstream pipe sections. The pipe elbow may also include a particle trap cavity, which traps particles suspended in the fluid flow. The trapped particles act as a buffer between a portion of the interior surface of the pipe elbow and particles subsequently carried in the fluid flow, thereby additionally protecting a portion of the interior surface of the pipe elbow from abrasion.

Abstract: An easily-assembled, heat-resistant connector for releasably joining end portions of two capillary tubes in end-to-end fashion for use in chromatography without interrupting fluid flow or interfering with chromatographic results, comprises a cylindrical sleeve which has a bore which tapers toward a center point to form press-fit seals with the tips of two capillary tubes. A first ferrule is mounted on the end portion of a first capillary tube, and a second ferrule is mounted on the end portion of a second capillary tube. A jacket surrounds and contains the sleeve, and a first adjustment screw mounted on the jacket pushes against the first ferrule to deform the ferrule into sealing contact with the outside surface of the first capillary tube and with the inside surface of the sleeve. A second adjustment screw mounted on the jacket pushes against the second ferrule to deform the ferrule into sealing contact with the outside surface of the second capillary tube and with the inside surface of the sleeve.

Abstract: Many recuperators have components which react to corrosive gases and are used in applications where the donor fluid includes highly corrosive gases. These recuperators have suffered reduced life, increased service or maintenance, and resulted in increased cost. The present joint when used with recuperators increases the use of ceramic components which do not react to highly corrosive gases. Thus, the present joint used with the present recuperator increases the life, reduces the service and maintenance, and reduces the increased cost associated with corrosive action of components used to manufacture recuperators. The present joint is comprised of a first ceramic member, a second ceramic member, a mechanical locking device having a groove defined in one of the first ceramic member and the second ceramic member. The joint and the mechanical locking device is further comprised of a refractory material disposed in the groove and contacting the first ceramic member and the second ceramic member.

Abstract: A bonded ceramic structure is fabricated by inserting a plurality of ceramic tubular members respectively in holes formed in a perforated ceramic plate member and bonding the same to the perforated ceramic plate. A clearance is formed between the outer circumference of the tubular member or that of a ceramic sleeve fitted on the tubular member, and the surface of the hole, and the clearance is filled up with a bonding material forming a bonding layer to join the tubular members to the plate by a high strength at a high positional accuracy. A method of fabricating such a bonded ceramic structure spreads a fusible bonding material on at least one major surface of the plate member, inserts the tubular members in the holes of the plate member, and fuses the bonding material so that the fused bonding material flows into the clearance between the surface of each hole and the tubular member to form a bonding layer continuously extending over the surface of the plate and in the clearances.

Abstract: A coupling device (10) provides sealing members (24), (26), preferably Indium wire O-rings (72), (74), suitable for sealing engagement with an insulating member (28) under cryogenic, high-pressure conditions. Coupling device (10) is designed to couple a first metal pipe attached to a first adapter (12), and a second metal pipe attached to a second adapter (14), so that fluid may be conveyed via bore (36), chamber (84), and bore (48) under such cryogenic high-pressure conditions. According to the invention, the coupling device (10) provides effective sealing under these extreme conditions while also providing thermal and electrical insulation due to the advantageous construction featuring insulating member (28), first collar member (20) and second collar member (22).

Abstract: A refractory pipeline having ceramic pipe sections with joints therebetween located at areas where in which there are the greatest temperature differences in the pipeline. Adjacent pipe sections are connected together by shoulders at the ends of each such section, the shoulder of one pipe section being radially outside the shoulder of an adjacent section. A further pipe section is pushed over the joint so as to form a gastight seal by defining a space in communication with a borehole through the one shoulder and a peripheral groove in the other shoulder. A pressure cushion is provided in the space by applying a barrier medium under pressure to the space and thereby through the borehole to the peripheral groove.

Abstract: The kit includes a U-shaped cooling part containing a coil condenser, various combustion chambers with or without water cooling, burners, sample containers, and separating receivers. Almost all of the parts are made of quartz. The parts are assembled by ground joints. The axes of the combustion part and the cooling and absorption part run parallel to one another and are vertical. In the various combustion apparatus assemblable from the kit, all substances can be burned completely and without trouble. The apparatus can easily be rearranged and optimally suited to each combustion task.

Abstract: The nut (3) is rotatable on the external thread (4) on the conical pin (1). A shackle (6) is mounted on the said nut and is pivotable about an axis (7) transverse to and at a distance from the central axis. The shackle engages behind the swelling (5) on the conical sleeve (2) and can be tightened by turning the nut (3). The nut (3) is formed so as to be divisible and is held together by a clamping device (8).

Abstract: A member formed of ceramic refractory material has therein an opening. A metal coupling member for attaching a metal member such as a rod or a tube, to the refractory member has an externally threaded portion extending into the opening in the refractory member. The coupling member has a head extending radially outwardly beyond the threads of the threaded portion and embedded in the refractory member. The opening in the refractory member may be internally threaded to receive the threads of the threaded portion of the coupling member.

Abstract: A tube extends through a wall of a vessel and is adapted to carry an ultraviolet emitter for use with a photochemical reaction vessel. An end of the tube disposed outside of the vessel is mounted within a support which forms a ball joint for that end of the tube. That joint allows the tube to pivot slightly in response to forces acting on the portion of the tube disposed within the vessel, thereby resisting any breaking or bending of the tube which might otherwise occur. A lip seal is disposed around the tube at a location intermediate the ball joint and the vessel to prevent the escape of fluids from the vessel past the tube.

Abstract: A design for sealing metal-to-metal, of sections of rocket shell with fusible vitreous inorganic "glass-ceramic" compositions, which will not burn-out from high temperatures of rocket-exhaust, is disclosed. The design is intended to set up a thermal-gradient across the cross section of the sealed metal flanges. The thermal-gradient utilizes the useful property of the vitreous state of the seal, viz., the continuous viscosity change from the relatively low viscosity of molten glass at high temperature, to a very high viscosity of almost solid state at lower temperatures. This mechanism achieves a leak-proof "glass-ceramic" or glass seal between the metal flange joints of sections of rocket-shell. The vitreous seal is capable of withstanding a wide range of temperature inside the rocket, of -50.degree. C., to over 1000.degree. C., without failure when the rocket is fired.

Abstract: A sight glass apparatus and method limiting external pressures on the sight glass. The sight glass apparatus has a pair of flanges wherein each of the flanges includes a tubular top portion which abuts the respective pipes. The tubular top portion includes a circular cut-out for providing a victaulic type connection for a clamping means to clamp to the respective pipes and a conical section which tapers into an annular rim section having a plurality of apertures wherein a bottom portion of the annular rim includes a center aperture being co-axially aligned when mounted to the pipes. An O-ring is mounted in a recess with a cylindrical glass tubing for observing the fluid or the like. The sight glass apparatus further includes machine precisioned shoulder studs with threaded ends. The ends protruding through the apertures of each of flange when connecting the sight glass apparatus together.

Abstract: A connector for tapered glass joints includes a first glass tubing section having a tapered sealing surface on an inner end surface thereof and threads on an outer surface of said end. A second glass tubing section has an end adapted to be telescoped into the end of said first tubing section, and a replaceable, resilient sealing sleeve is adapted to be sealingly engaged concentrically between the outer end surface of the second tubing section and the inner end surface of the first tubing section. A threaded cap is adapted to be threaded onto said threads of said first tubing section to secure the parts together and to force the sealing sleeve into tight sealing engagement with the respective tubing surfaces.

Abstract: A connecting capillary tube is arranged in a branch coupling and is shorter than the guide bores into which separation columns are introduced. The ends of the separation columns slide automatically over the ends of the connecting tube. The connecting tube is sealed with metal disks instead of graphite ones. The flush gas conduits are so arranged that the dead spaces can be well flooded, reducing adsorption of sample and increasing the performance of the gas chromatograph.

Abstract: A tubing coupling device constructed in accordance with this invention is comprised of a rigid body having cavity therein, an aperture communicating with the smaller end of said cavity and a tapered ferrule having an axial passageway that is aligned with the aperture. Means such as a nut that is in threaded engagement with the end of the rigid body opposite the aperture forces the ferrule into the cavity. The relative shapes and dimensions of the cavity and the ferrule are such that as the ferrule is forced into the cavity it is subjected to radial compression so as to attain intimate contact with the exterior surfaces of the end portions of tubes that are inside the ferrule.

Abstract: Tubular components made out of quartz glass or fused quartz, such as tubes, bells, hoods, or pans, with a flange fused or welded onto them are known. To improve cooling such a tubular component, especially the sealing surfaces of the flange, heat conduction and heat radiation in the vicinity of the flange are extensively avoided and, to make it possible to create long-diameter tubular components, the flange is designed hollow and narrow-walled, whereby a coolant, preferably water or a gas, can be conveyed through the hollow space in one preferred embodiment for purposes of interior cooling or the hollow space can be packed with a heat-insulating material.

Abstract: A long alumina ceramic tube having good linearity is made by longitudinally joining shorter sintered alumina tubes at the ends thereof. The end of one shorter tube is ground and externally threaded. The end of another shorter sintered alumina tube is ground and internally threaded. The externally threaded end is then securely threaded into the internally threaded end. Additional tubes are similarly ground and threaded to attain the length of the long alumina ceramic tube.

Abstract: A glass tube heat exchanger including a sealing sleeve comprising at least one hydraulic sealing section, an intermediate sealing section and an interior sealing section is disclosed. The hydraulic sealing section has a triangular cross section including one obtuse angle formed by two legs, one of which extends radially outwardly from the longitudinal axis of the seal. The intermediate sealing section comprises a generally cylindrical shaped body and at least one, and preferably two, toroidal belts. The interior sealing section comprises a lip adapted to seal tightly against the glass tube and a flange adapted to seal against the tube sheet. Preferably, the interior sealing section is a mirror image of the hydraulic sealing section.

Abstract: A connection assembly for joining two parts having confronting ends with a joint therebetween, particularly ceramic pipes, includes a dimensionally stable coupling member surrounding the joint and at least one of the two confronting ends of the two parts to be joined. The coupling member is dimensioned to define a space with the at least one part end. This space is filled with a ceramic fiber mat material containing a swelling agent capable of volume expansion when subjected to a temperature above a given minimum temperature. As a result, upon being subjected to an operating temperature above such given temperature, the swelling agent swells the ceramic fiber mat material, such that the mat material is compressed between the coupling member and the at least one part end surrounded thereby, thereby connecting the two parts.

Abstract: The disclosed fitting connects a tubing end to a fluid conducting member which have a fluid port and end walls surrounding the port and a threaded portion surrounding the end wall. The fitting comprises a ferrule of resilient deformable material having a forward portion with a wide flat sealing surface which is adapted to mate with and sealingly engage the end wall surrounding the port. The ferrule has a throughbore with a diameter through its rearward portion being sufficient to receive the tubing end and the diameter through the forward portion being smaller than the tubing exterior thereby forming a tubing abutting shoulder within the ferrule. The ferrule is forced into sealing abuttment with the end wall of the fluid conducting member and into sealing engagement around the tubing by means of a fastener having a throughbore for receiving the tubing which is flared at its forward end to present conical walls for axially engaging the rearward end of the ferrule.

Abstract: A gripping saddle and O-ring apparatus comprising a hub structure having a central aperture therethrough, resilient flanges extending from each end of said hub structure and integral therewith, and thus providing a central groove therebetween for reception of a resilient O-ring therewith. Depending upon the size of the O-ring, the flanges will be only slightly deformed outwardly or greatly deformed outwardly. When this structure is used with laboratory apparatus containing corrosive liquids, the embodiment with slightly expanded flanges is preferred, while when the apparatus is used for stop cock securing functions, the greatly deformed flange apparatus is preferred.Preferably, the saddle hub structure is made of Teflon or other fairly slippery and non-frictional plastic material, while any type of rubber or rubber composition may be employed for the O-ring.