Abstract: Each of the multifibers which are stacked in parallel and compressed together to form a boule during the process of manufacturing microchannel plates is hexagonal in cross-section, and single fibers having thicker channel walls are placed at corners of the hexagon in order to prevent damages to corner fibers which are exposed to the strongest external forces.

Abstract: A soldering device for radiator tanks comprises a large number of burner nozzles disposed along the entire width of and directed to the soldering area. Cooling pipes are provided on burner tables which can be adjusted so that the radiator can be inserted inside the gap formed therebetween. A control means shifts the times for starting and shutting off the supplying of an oxygen-containing gas from the burner ignition and fire extinction times.

Abstract: A lubricating agent for processing thermoplastic synthetic fibers contains at least one new type of silyl polyether obtainable by a reaction between polyether of a special type derivable by ring-opening addition polymerization of cyclic ether monomers and halogenated substituted silane. If such lubricating agent is used appropriately during the processing of thermoplastic synthetic fibers, both the coefficient of fiber friction and the rate of generating tar can be reduced.

Abstract: An apparatus for using centrifugal force to remove left-over rolls of paper from the core rods around which they are wound. The rods are placed inside a cylindrical container rotating around its axis of symmetry which is maintained at an angle with the vertical direction. The speed of rotation can be varied in accordance with the quality of the paper.

Abstract: When two pieces of magnetic material are clamped together in a magnetic circuit, a silicone rubber piece is used to control the clamping pressure in order not only to prevent material stress at the clamping surfaces but also to compensate for the effects of temperature expansion of the magnetic material.

Abstract: A process for packing narrow bore chromatographic columns and the resulting product are provided. A flexible column, preferably of fused silica, of inner diameter less than 500 .mu.m is selected. A slurry is formed in a reservoir from a mobile solvent and particles of specified diameter. For liquid chromatography the particle size ranges from 3 .mu.m to 10 .mu.m; for gas chromatography the particle size ranges from 3 .mu.m to 100 .mu.m. An end restriction is placed in the end of the column to permit the flow of mobile solvent and to restrict the passage of particles out the end of the column. The reservoir is attached to the column and the slurry is caused to flow under pressure into the column. A two-step pressure sequence is used to first set up the bed of particles and then to compress the bed. First, an initial pressure is maintained for an initial period, preferably less than 10 minutes.

Abstract: A solute focusing method is applied to the on-column injection of a liquid sample in gas chromatography so that relatively large sample sizes can be used without causing intolerable column flooding. The injection zone of the column is kept originally at a temperature below the solvent boiling point but the temperature in the adjacent downstream zone is kept higher than the solvent boiling point so that the solvent will evaporate and flow downstream, leaving the solute molecules concentrated within a relatively limited length along the column.

Abstract: A plunger seats in the outlet end of a cavity formed in an injector housing. The plunger is moveable within the cavity between seated engagement with the outlet end and a position which permits fluid to flow out the outlet end. The cavity is sealed to withstand pressures on the order of 2000 bar. A groove formed in the wall of the plunger or in the wall of the cavity receives liquid sample from a sample feed line which is formed in the body of the housing and terminates adjacent the groove when the plunger is seated in the outlet end of the cavity. A source of mobile phase fluid is connected to the upper end of the cavity by an inlet line. By external displacement means, the plunger is moved out of seated engagement within said cavity to permit a jet stream of mobile phase fluid to sweep the sample from the sample groove out through the outlet end of the cavity and onto a chromatographic column connected to the injector housing.

Abstract: An unheated septumless on-column injector with two internal flow paths is provided. A syringe means is positioned adjacent and communicates in vapor-tight relationship with the inlet ends of the two internal flow paths. The first internal flow path accepts and guides a needle from said syringe means onto the column of a gas chromatograph to permit injection onto the column. The second internal flow path allows the syringe means to either be loaded from or purged into an attached, sealed container. The needle of the syringe means is movable between the first and second paths by external manipulation. In particular embodiments, carrier gas is provided to sweep the sample into the low diameter column and cooling means is provided to ensure that the point of injection of the liquid onto the chromatographic column is maintained at a temperature below the boiling point of the most volatile component of the liquid sample.

Abstract: The two magnet structures for establishing therebetween a magnetic field for a multi-stage electromagnetically-tuned filter are provided with tapered machine screws each of which can change the separation between the structures at the point where that screw is mounted so that the pole pieces defining the magnetic field can be tilted in any direction with respect to each other while the filter is operating.

Abstract: Temperature inside a tissue volume is noninvasively determined on the basis of its known relationship with the velocity of ultrasound inside the volume. The velocity of ultrasound between two field points inside the volume of interest is calculated from measurements of differences in transit times of sound beams scattered in substantially opposite directions at these field points.

Abstract: A golf club head comprising two or more thin shell sections, for instance a front shell section and a rear shell section, or a face shell section, a top shell section and a body shell section including a bottom section and a side section, are secured together along their edges to form a one-piece shell having a sealed space. A shaft is also secured together with the shell sections when securing these sections. The sealed space is filled with a filler material such as foamed urethane and rubber.

Abstract: Each of the multifibers which are stacked in parallel and compressed together to form a boule during the process of manufacturing microchannel plates is hexagonal in cross-section, and single fibers having thicker channel walls are placed at corners of the hexagon in order to prevent damages to corner fibers which are exposed to the strongest external forces.

Abstract: Solar cells with different bandgaps are stacked to form a multijunction photovoltaic converter with a high conversion efficiency. By stacking the cells mechanically rather than by growing them all at one time, the most convenient combination of materials may be selected for the cells. The stacking is completed by means of a glass sealing layer with moats containing inter-cell contacts which are bonded to the cells.

Abstract: A grooved solar cell for deployment at a set angle with respect to incoming radiation has reduced contact obscuration and series resistance. A regular array of walls formed by grooves in a crystalline semiconductor substrate is exposed to incoming radiation. Metallic contacts are formed on those walls of the grooves which are not to be exposed to sunlight. The solar cell is mounted in an apparatus at a set angle with respect to incoming radiation. The array of walls is exposed to incoming radiation while the walls with metal contacts are substantially shadowed. In a preferred embodiment the grooves are formed by using orientation specific etches.

Abstract: The invention is a method for controlling the temperature of a primary heat-generating source in an environment whose temperature may vary widely. A heat-pipe is used to carry the heat from the source to a sink at ambient temperature. A separate control source applies heat to the heat pipe. The condensed liquid returning in the heat pipe is partly evaporated by the control heat, whereby the flow of liquid available for evaporation by the primary heat source is reduced and the heat conducted away from the source by the pipe is consequently reduced. The control source heat is regulated by a servo circuit to maintain the temperature of the primary source. The efficiency is higher than prior-art controllers using a constant thermal impedance between source and sink.

Abstract: A new method of fabricating a cylindrical segmented cathode by bending a photoetched bar-band to form a cylindrically-shaped cage and slipping it over a cylindrical electron emissive surface which will tightly fit inside the cage when the cathode is raised to its normal temperature. The bars of the band provide nonemissive segments of the cathode surface.

Abstract: In a traveling wave tube (TWT) using an interaction circuit of the helix-derived type, the gain of the tube normally varies significantly over the passband. The invention provides a simple method of reducing the gain variation together with a reduction in the noise power density produced at the output of the tube. This is accomplished by affixing a nonresonant terminated transmission line such as a meander line on at least one of the dielectric rods used to support the helix.

Abstract: A gyrotron cavity resonator is connected smoothly and directly to an output waveguide with a very gradually tapered wall so that values of external Q lower than twice the diffraction limit are obtainable.

Abstract: The present invention provides a touch detector for preventing collision involving an electron therapy applicator. A sensor is suspended from a cable wrapped on a system of pulley wheels and attached to a spring. By adjusting the configuration and tension of the cable properly with respect to the weight of the sensor, the detector sensitivity can be made reasonably independent of the direction of the detected force as well as the position of the apparatus.