Abstract: A method for coating interior capillary column surfaces, or packing material of a packed column, used for gas chromatography, with a stationary polymer phase that is cross-linked by exposing it to a low-temperature plasma that is uniformly distributed over the column or packing material for a predetermined period of time to effect the desired degree of cross-linking of the coating.

Abstract: A fixture for automatically and selectively coating a predetermined area of the inner surface of a hollow body with a liquid, wherein the hollow body has a closed end and an open end with an edge which defines the open end. The fixture is preferably at least partially disposed in a volume of the coating liquid, and comprises a base member, a pressure tube attached to the base member, and in fluid communication with a variable pressure source, and a hollow body support for orienting the hollow body in inverted condition with its open edge partially submerged in the volume of coating liquid. The inverted hollow body thereby provides a closed cavity defined by the closed end of the hollow body and the partially submerged open edge. A preferred embodiment of the fixture further includes a control partition extending upwardly from the base, circumscribing and spaced radially from the pressure tube.

Abstract: Electrically conductive multicomponent material is deposited on a tubular substrate (3) by means of a PCVD method. A plasma (9) is produced between an inner electrode (13) and an outer electrode, one of which is tubular and serves as a substrate. In order to obtain multicomponent material of the desired composition, the composition of the gas phase is changed as a function of time and/or place. In particular when metalorganic starting compounds are used, PCVD of many single layers together with an intermittent, for example, Ar/O.sub.2 plasma intermediate treatment yields an efficient removal of undesired carbon or fluorine from the deposited multicomponent material already during its manufacture.

Abstract: The invention concerns a manufacturing process of a photocathode for an image intensifier tube.According to this process, the photocathode is made within the tube by depositing a photoelectric material on a conductive substrate by vacuum evaporation. During this operation, the optical transparency of the deposit is checked by illumination of this deposit by a light source. According to the invention, this light source is located within the tube and is protected from the vapors of the photoelectric material. In the prior art, this light source was located outside the tube and the illumination of the deposit was not sufficient.The invention has applications in the field of image intensifier tubes.

Abstract: An apparatus for generating a plasma in the lumen of a small diameter tube includes a housing having a diaphragm which separates the housing into a first chamber equipped with a gas inbleed assembly and a second chamber connected to a vacuum source. Parallel plate electrodes in the first chamber are encased in a dielectric which prevents substantially all plasma discharge external of a plasma zone between the electrodes. A conduit maintains gas flow between the chambers. A bore through the dielectric includes the plasma zone and receives the tube to be plasma treated.A method for treating the luminal wall of a plastic tube includes positioning a tube in the plasma zone, evacuating the chambers, bleeding a gas into the chambers, and delivering radiofrequency power to the electrodes. A long tube may be drawn through the plasma zone, or the dielectric and electrodes may be moved past the tube.

Abstract: A method and apparatus for deep penetration deposition of material in a porous substrate utilizes a pressure differential across the substrate to effect penetration of arc-produced vapor from one chamber through the body. The one chamber can be held at a pressure of 10.sup.-2 to 10.sup.-3 torr while the other chamber is at a pressure of 10.sup.-5 to 10.sup.-6 torr.

Abstract: The invention relates to a method for the production of a filled layer component made out of a monolithic ceramic body by impregnating a ceramic layer body of dense and porous layers with liquid impregnating material which wets the ceramic and by applying contacts. According to the invention the contacts are applied following the impregnation process without any further intermediate steps, and an electrical bonding of the contacts to the metal filler takes place.

Abstract: For the fluorination of synthetic resin articles, e.g., containers, the article to be fluorinated is positioned in a gastight chamber, and a fluorinating treatment gas is produced from a fluorine precursor in situ, e.g., with the aid of a plasma torch from a basic gas mixture comprising a fluorine-containing compound, e.g., CF.sub.4 or SiF.sub.6.

Abstract: A silicocalcareous mass obtained from an aqueous paste with a base of natural silica and quicklime. The mass is at least doubly stabilized by two mineral suspending agents, and reinforced by a fibrous reinforcing agent. The suspending agent comprises cellulose fibers which may be partially chemically delignified, partially mechanically delignified, or delignified by a combination of chemical and mechanical processes, introduced in an amount of from about 3 to about 30% by weight of the solids. The porous silicocalcareous masses are used for lining containers for gas storage, particularly for containers for storing acetylene gas.

Abstract: A method for producing pigment flakes in the shape of thin plates. A chamber is provided which is placed under vacuum and a gas, which is capable of forming a plasma upon its exposure to a plasma generating device, was fed to the interior of the chamber device. The plasma is created within the chamber which forms a film upon a surface within the chamber. The film is converted to flakes which are then removed from the interior of the chamber.

Abstract: A method of applying a protective coating to the inner surface of a pipeline includes the steps of adhering a porous flexible hose to the pipeline inner surface, an end of the hose of which is turned inside out and attached to the pipeline. The hose is moved inside the pipeline by progressively turning it inside out and pressing it to the inner surface of the pipeline by providing an excess pressure in a cavity formed by the portion of the hose turned inside out, and producing a counter-pressure before the hose as the same travels lengthwise of the pipeline. The magnitude of the counter-pressure is maintained at a predetermined level in the course of the hose travel. A piston having a passage for the hose is placed in the cavity formed by the portion of the hose turned inside out, and a binder is placed between the piston and the portion of the hose turned inside out. The binder soaks through the pores of the hose to facilitate the formation of a bond between the hose and the inner surface of the pipeline.

Abstract: The disclosed charge transfer signal processor includes a vacuum housing having an input face and an output face, a 2-D electromagnetic input means cooperative with said input face for providing a 2-D input electronic charge signal within the vacuum housing, transfer means for imaging the 2-D input electronic charge signal in a region of the vacuum housing proximate the vacuum housing output face, and charge feedthrough means coupled to the vacuum housing output face for transferring the imaged 2-D electronic charge signal externally to the vacuum housing. In one embodiment, the charge transfer signal processor is operable as Gen-1 charge transfer amplifier. In another embodiment, a microchannel plate assembly is disposed in the vacuum housing intermediate the input and output faces, and the charge transfer signal processor is operable as a high-gain charge transfer signal amplifier.

Abstract: An end surface (5, 5b) of a cylindrical ceramic body (2, 2b) is dipped into a bath of metal paste (15), so that an opening (10, 10b) formed in the end surface is closed by the metal paste. Then an air pressure difference is provided such that the air pressure in an inner space (9, 9b) of the ceramic body is lower than the air pressure in an outer space (19, 19b) surrounding the ceramic body, whereby the surface of the metal paste located in the inner space is upwardly moved. Thus, a substantial region of an inner peripheral surface (7, 7b) of the ceramic body is brought into contact with the metal paste. Then the pressure difference is cancelled so that a metal paste film (21, 21a, 21b) for serving as an inner electrode (3, 3a, 3b) of a cylindrical capacitor (1, 1a, 1b, 1c) is formed on the inner peripheral surface.

Abstract: A high performance ballistic grease is used in ammunition and a lubricating process to protect the barrel of a weapon from corrosion and overheating. The ballistic grease, ammunition, and process improve the structural integrity and accuracy of the weapon and are economical, nontoxic, effective, and safe. The preferred ballistic lubricating grease comprises a polyalphaolefin base oil, an amorphous silicon dioxide thickener, and a disodium octaborate tetrahydrate additive.

Abstract: Gas-pressure bottles are internally coated by plugging the mouth of the bottle and evacuating the bottle. The coating material is formed by striking repeatedly electric arcs between the electrode deposed within the bottle and the wall of the latter.

Abstract: An apparatus for generating a plasma in the lumen of a small diameter tube includes a housing having a diaphragm which separates the housing into a first chamber equipped with a gas inbleed assembly and a second chamber connected to a vacuum source. Parallel plate electrodes in the first chamber are encased in a dielectric which prevents substantially all plasma discharge external of a plasma zone between the electrodes. A conduit maintains gas flow between the chambers. A bore through the dielectric includes the plasma zone and receives the tube to be plasma treated.A method for treating the luminal wall of a plastic tube includes positioning a tube in the plasma zone, evacuating the chambers, bleeding a gas into the chambers, and delivering radiofrequency power to the electrodes. A long tube may be drawn through the plasma zone, or the dielectric and electrodes may be moved past the tube.

Abstract: The present invention provides a method of treating a SIMOX wafer so that oxygen precipitates and heavy metal, carbon, and other contaminants are substantially reduced. The method includes forming a protective layer on the SIMOX surface, heating the wafer and protective layer so that the precipitates and contaminants disolve and diffuse into the protective layer, and slowly cooling the wafer to permit continued diffusion during cooling.

Abstract: Containers such as syringes can be coated on their interior surface with biologicals such as heparin by atomizing the biological inside the container and reducing the pressure within the container for a period of time sufficient to allow the atomized biological to "auto-freeze" dry.

Abstract: An apparatus for treating air core cables such as air core plastic insulated telephone cables, which includes a treatment tank provided with air and liquid application piping; an air application saddle or fitting and at least one liquid application saddle or fitting applied to the telphone cable in spaced relationship, with air and liquid application connections extending from the saddles; and a cable block sealing a segment of the air core cable to be treated. Air and liquid are applied in sequence to the plastic insulated cable pairs located in the cable, in order to clear water and other fluids from the cable and restore electrical transmission through the cable pairs.

Abstract: The present invention relates to the deposition of a thin layer of a material on the wall of a hollow body. According to the invention, a cathode (9) of variable geometry, the metal wires (13) being capable of extending and retracting, is arranged inside the hollow body (1b), a plasma of a complex of the material to be deposited being produced and placed in contact with the polarized wall of the hollow body (1). The invention applies in particular to the deposition of a thin layer of diamond-like amorphous carbon on the outside of a narrow-necked glass bottle, in order to increase its impact strength.

Abstract: Improved composite pipes are proposed which comprise an outer pipe made of plastic and a thin lead layer on the inner wall of the outer pipe. The lead layer is formed by arranging a lead pipe in the outer pipe and expanding it by use of pressure medium into close contact with the inner wall of the outer pipe. The outer pipe may be circular or square or double-path. A process for producing the composite pipes is also proposed.

Abstract: A silicon nitride coating is deposited on the inside surface of a crucible by pyrolysis. Reactive gases are fed through a tube into the crucible. The crucible is rotated during deposition and the crucible walls are maintained at a temperature of at least about 1250.degree. C.

Abstract: A method and apparatus for providing a thin substantially uniform polymeric coating on the inside surface of tubing. Tubing constituted of dielectric material is passed through a glow discharge zone in which the glow discharge is produced by reactance coupling utilizing power provided by a radio frequency power source. Simultaneously with the movement of the tubing through the glow discharge zone, a monomer that is subject to glow discharge polymerization is passed through the glow discharge zone in the interior of the tubing, while a low absolute pressure is maintained in the interior within the zone. Glow discharge polymerization of the monomer is thereby effected to form a thin polymeric coating on the inside surface of the tubing.Also disclosed is a novel tubing constituted of dielectric material and having on the inside surface thereof a thin adherent, substantially uniform coating produced by glow discharge polymerization.

Abstract: A method and a device for lining existing pipelines such as water conduits and sewers disposed in the ground with a flexible hose containing a curable plastic material which hose is introduced into the pipeline to be lined in uncured state and is then made stable in form by curing of the curable plastic material included in the hose. To make possible a rapid and efficient curing of the plastic material included in the hose (4) the hose (4), after being pressed out against the pipeline (1) by means of compressed air, is exposed to radiation energy from a curing aggregate (18) containing a radiation source (19), which aggregate is drawn internally through the hose (4) at the same time as air flows through said hose.

Abstract: The present invention comprises an apparatus for installing a flexible tubular liner into a pipe. The apparatus comprises means for defining a pressurized region for inserting the liner into the pipe and an insertion conduit, having an entry end and exit end connected to the means defining the pressurized region. Means are provided on the exit end of the insertion conduit for sealing, clamping the leading end of the liner to the exit end of the insertion conduit and for creating an fluid tight seal between the liner and the insertion conduit. A first feed control mean is provided for substantially continuously controlling the feed rate of the liner as one portion of the liner is inserted into the pipe. The feed control means comprises a conveyor means having a slack conveyor belt, an idler nip roller assembly, including nip rollers juxtaposed in a line space relationship to the conveyor means and means for controlling the speed of movement of the conveyor belt.

Abstract: A process and apparatus for high pressure impact coating of portions of workpieces such as the threaded openings in fasteners in avoidance of contaminating undesired portions of the workpieces with the coating material. A metered quantity of coating material is charged into a passageway and moved by low pressure air to a chamber ahead of an atomizing nozzle. High pressure air is introduced to the passageway and the coating material is fogged into a chamber defined by the workpiece and tooling. Proliferation and impingement of the cloud on the selected surfaces follows under vented conditions. A constriction in the vent line achieves the necessary delay and sets the system for accomplishing the coating. The machine structure facilitates use of the coating devices with a wide range of female threaded fasteners and achieves the process steps while providing for flushing the lines and drying the working structure.

Abstract: There is provided a method and composition for improving the resistance to absorption of water by a porous rigid sintered and pressed block of short staple amorphous silica fiber by distributing within the pores of said block an alkylalkoxysilane or a fluoroalkylalkoxysilane which is substantially free of deleterious halide. Halide may be reduced by special purification techniques or by neutralization in situ with an acid scavenger.

Abstract: Method and apparatus for coating catalytic converter substrates with an exact amount of a precious metal. In the course of operation of the apparatus, a hollow substrate to be treated having opposed open ends is transferred from a starting location such that one end is lowered into a dip pan into which has been introduced a predetermined amount of slurry material containing the precious metal. With the one end immersed in the slurry, a vacuum placed on the other end of the substrate draws up the entire charge of slurry from the dip pan to coat the lower portion of the substrate. Thereafter, the substrate is raised from the dip pan. The vacuum continues to operate to cause the coating to be evenly distributed on all the interior surfaces of the substrate. Then the substrate is rotated and again lowered so that the other end is immersed in another predetermined charge of the slurry and the process is repeated. Thereupon, the substrate is again raised from the dip pan.

Abstract: A method of lining a pipeline or passageway with a flexible tubular liner. The liner is caused to evert in the pipeline by a fluid under pressure, and a former is used to smooth out the everting face of the liner and evenly apply resin over the everting face.

Abstract: Electronic packages and the like, particularly finished packages with leaky welds, are hermetically sealed by vapor deposition of a polymer film through a sealable port. A high quality film is obtained by slow deposition of a monomer vapor which subsequently polymerizes. The process is not destructive due to the lack of high temperatures and curing agents. Extremely low permeability for common molecules and for water vapor is achieved by utilizing C-type para-xylylene as the polymer material.

Abstract: The present invention discloses composite material for thermal energy storage based upon polyhydric alcohols, such as pentaerythritol, trimethylol ethane (also known as pentaglycerine), neopentyl glycol and related compounds including trimethylol propane, monoaminopentaerythritol, diamino-pentaerythritol and tris(hydroxymethyl)acetic acid, separately or in combinations, which provide reversible heat storage through crystalline phase transformations. These phase change materials do not become liquid during use and are in contact with at least one material selected from the group consisting of metals, carbon siliceous, plastic, cellulosic, natural fiber, artificial fiber, concrete, gypsum, porous rock, and mixtures thereof. Particulate additions, such as aluminum or graphite powders, as well as metal and carbon fibers can also be incorporated therein. Particulate and/or fibrous additions can be introduced into molten phase change materials which can then be cast into various shapes.

Abstract: A method for repairing pipes laid underground, such as gas pipes, consisting of a main supply pipe from which numerous distribution pipes branch off to supply the individual users, the method using resin to repair the main supply pipe and the distribution pipes from the inside while in their buried state.The repair method of this invention is characterized by the fact that, having repaired the main supply pipe and the distribution pipe in successive operations, whether the repairs to the main supply pipe and the distribution pipes have been done properly or not can be confirmed on completion of the repairs by carrying out sealage tests on the distribution pipes and the main supply pipe.

Abstract: A method of metallizing through holes in dielectric substrates with a metallizing material comprising forming a hole in the substrate utilizing laser techniques, depositing a layer of a dielectric on the side wall of the hole and then depositing a layer of a metallizing material onto the dielectric layer.

Abstract: In a method for coating a surface with a layer the surface is first subjected to vacuum in a vacuum zone (V) sealed against the surface, whereupon liquid for forming the layer is supplied to the surface in a sealed pressure zone (P) following the vacuum zone. The supplied liquid is then spread out in a controlled manner, preferably by the sealing (13) terminating the pressure zone. FIG. 1.

Abstract: A vapor deposition apparatus including a vacuum chamber, a vacuum pump for evacuating the chamber, and a mounting assembly disposed within the chamber and adapted to support and electrically isolate a plurality of substrate electrode units to be coated. Electrical couplings connect the electrode units to a power supply that establishes therebetween potential gradients that produce a glow discharge and resultant heating thereof. Also disposed within the vacuum chamber is a source of evaporative coating for deposition on the glow discharge heated electrode units.

Abstract: A process for remotely fixing toxic dust, such as plutonium oxide, on the surfaces of a sealed cavity defining an airlock between two enclosures containing toxic material which are sealingly coupled to each other, so as to avoid contamination of the atmosphere upon uncoupling of the enclosures. The cavity is filled through an inlet zone with a solution of silicone grease in a solvent, such as freon, which is capable of wetting the surfaces of the cavity. The solvent is vaporized and evacuated from the cavity such that the silicone grease is deposited on the surfaces of the cavity to fix the toxic dust thereto.

Abstract: A method and apparatus for coating the interior edge of an open ended container with an adhesive strip or band. An open rim of a container abuts a flat surface on an adhesive applicator head. A flowable adhesive passes radially outwardly and thence axially, between the inner container rim surface and a part of the head, to deposit a band of adhesive, such as a hot melt adhesive, on the container inner surface. The flat surface of the head functions both to position the container relative to the head and to form a seal to thus permit adhesive coating up to the edge of the open container end.

Abstract: A method for insulating slots of a rotor in an electrical rotating machine comprises steps of removing punching oil from a rotor core assembly by heating only the interior of the slots to a high temperature while axially compressing the rotor core assembly, applying a liquid electric insulating paint to the inner wall surfaces of the slots by introducing the paint only into the slots and then discharging the paint from the slots while pressurizing the rotor core assembly, applying a negative pressure to the lower ends of the slots to remove the paint collected at the lower ends of the slots, and heating at least the interior of the slots to bake the paint on the inner wall surfaces of the slots.

Abstract: A coating of metallic material is deposited on the internal surface of a hollow object. An elongate member comprising two electrical conductors extending side-by-side from end-to-end of the member has one end inside the hollow object and its opposite end outside the object. A filament has its two ends connected to the conductors respectively at the one end of the elongate member, and a crucible containing metal to be deposited is supported above the filament and in spaced relationship thereto. By supplying current to the filament by way of the conductors for the filament is heated to achieve thermonic emission. The filament and the crucible are connected to negative and positive terminals respectively of a potential source so that electrons emitted by the filament are accelerated towards the crucible and cause the crucible to be heated by electron bombardment.

Abstract: A process for the production of a vulcanized latex protective coating bonded to the surface of an asbestos-cement article, particularly a pipe, is disclosed. The process includes a step whereby the latex coating is applied before autoclaving to the article, and becomes a hard, protective bonded layer during the autoclaving process.

Abstract: A layer of dielectric material, carrying printed or thick-film circuit components on opposite surfaces, is provided with one or more bores extending between aligned circuit points to be conductively interconnected. The layer is sandwiched between two masks having a perforation of larger diameter in line with each bore, such perforation communicating with a respective chamber in an adjoining member forming part of a pair of clamp jaws pressing the masks against the layer. A conductive liquid or paste in one chamber is pumped through each bore from one chamber into the other, via the adjoining perforations, by the respective application of pressure and suction to these chambers with the aid of membranes or pistons moving codirectionally in one or more strokes.

Abstract: A method of making optical fibers by plasma chemical vapor deposition (PCVD) is disclosed wherein the pressure in the glass tube is maintained constant by controlling the rate of evacuation. The pressure-dependent controlled variable is preferably the impedance of the plasma-producing device, and the rate of evacuation is controlled in such a way that this impedance remains constant.

Abstract: Coating a thin film of magnesium hydroxide on the radiant section of the furnace walls of boilers prevents slagging and controls ash buildup.

Abstract: A blend of at least 35 percent alumina and not more than 45 percent calcium oxide is blended with sand at a sand-to-cement ratio preferably 1.8 and applied to the interior of a metal pipe, for example, by means of centrifugal application and compression. Following which the resulting lining is exposed to moisture for several hours which exposure step is in turn followed by an exposure to warm steam also for several hours.

Abstract: A method for lining pipes in a pipeline. The method is characterized in that the air in the pipeline is sucked from an outlet by a vacuum pump together with plastics mist, and additional air is supplied from an inlet of the pipeline at a low pressure, so that the pipeline is lined with the plastics. The residual plastics mist is recovered into a tank at the outlet end of the pipeline.

Abstract: A method for lining pipes of a pipeline. The method is characterized in that at a first stage, mist of plastics having a low viscosity is passed through the pipeline by carrier air at a low pressure, and at a second stage mist of plastics having a high viscosity is carried through the pipeline at a high pressure, thereby to form double layers of plastics on the inner wall of the pipeline.

Abstract: A protective refractory metal oxide coating of 3Al.sub.2 O.sub.3.2SiO.sub.2 or 3B.sub.2 O.sub.3.2SiO.sub.2 is coated on the internal surface of a vessel by low pressure plasma induced chemical reactions. The source of the SiO.sub.2 required for the reaction can either be from the internal surface of the vessel (e.g., glass, quartz) or it can be introduced into the vessel.

Abstract: To fill up the ring-shaped gaps between the tubes and fins of a tube and fin type heat exchanger with a corrosion protective hardenable filler, a unit made up of two closing pieces with filler material between them is pushed by means of the tube to be inserted in the stacked fins through the space formed by the collars of the openings in the fins which are stacked together for assembly into a heat exchanger. On passing this unit through the stacked fins the ring-shaped gaps are filled up with the filler material. The remaining thin film on the collars is also forced into the ring-shaped gaps when the tubes are subsequently expanded. A device for carrying out the process comprises a sleeve with a mandrel which slides inside the sleeve and forms a seal with the sleeve and a piston which likewise slides in the sleeve and forms a seal therewith and which lies ahead of the mandrel forming a space which can be varied in size and which accommodates the filler material.

Abstract: A process for coating the inside diameter of a tube utilizes a coated manl which has been first coated in a Ni Cr Al Y slurry, air dried, vacuum sintered, and then inserted in a tube. A mandrel-tube assembly is then swaged and resintered under vacuum conditions. The sintered mandrel-tube assembly is first drilled and then chemically etched to remove remaining mandrel material.

Abstract: A method of powder coating the inside of tubular goods, such as oil field pipe and the like, by connecting one end of the pipe to a means for producing a flow of compressible gases therethrough. The other end of the pipe is open to atmospheric pressure. A valve means is connected upstream of the pipe between the inlet end thereof and a container for holding a single charge of plastic powder. The charge of powdered plastic is isolated upstream of the pipe inlet. The charge is of sufficient size to coat the entire inside peripheral wall surface of the pipe with a substantial uniform coating of plastic.