Abstract: A filter standpipe is mounted within a relief conduit of a cryopump. The relief conduit is joined to an exhaust conduit, and the exhaust conduit is joined to a housing which defines a vacuum chamber. The relief conduit and exhaust conduit define passages which are in fluid communication with one another and also with the vacuum chamber. The filter standpipe extends, from where it is mounted in the relief passage into the exhaust passage. A method for installing the filter standpipe includes the steps of removing a relief valve from a mount on the end of the relief conduit, inserting the filter standpipe through the mount, and remounting the relief valve.

Abstract: A photoconductive switching device is disclosed that has an enhanced speed of response so that its closed (low) and open (high) resistive states are obtained in response to optical illumination in the less than nanosecond regime. The enhanced speed of response is achieved by neutron irradiation of a material preferably comprising GaAs:Si:Cu. An application of the improved photoconductive switching devices is disclosed which allows the realization of a high-power, frequency-agile RF source topology.

Abstract: A hydraulic control system for displacing a synchronizer into engagement with a rotating gear in a gearbox includes a hydraulic piston/cylinder unit mechanically coupled to the synchronizer, an electrically controllable pressure regulating valve for supplying hydraulic fluid to the piston/cylinder unit and an electrical control circuit acting on the pressure regulating valve to vary the pressure of the hydraulic fluid supplied to the piston/cylinder unit. In order to effect a rapid and smooth engagement of the synchronizer, the control circuit acts to increase the pressure of the hydraulic fluid supplied to the piston/cylinder unit progressively.

Abstract: This invention is a leg stretcher with a frame having a seat mounted thereon. A pair of leg platforms are hingedly mounted on opposite sides of the seat with removable hinge pins so that the platforms can be quickly connected and disconnected from the seat. A vertically disposed hydraulic jack is mounted on the frame below the seat. A vertically disposed lift beam is mounted on the hydraulic jack with rollers on the end thereof for engaging a block on the underside of each of the leg platforms so that as the jack raises the beam, the outer ends of the leg platforms will be raised toward a more horizontal position with smooth rolling contact between the wing blocks and the rollers. Elongated handles are connected at one end to the release valve and pump arm of the hydraulic jack with the other ends being disposed adjacent the seat so that the person using the leg stretcher can manipulate the hydraulic jack upwardly and downwardly while sitting on the seat.

Abstract: The absorbency of regenerated viscose filaments is improved by overfeeding a continuous tow of partially regenerated filaments onto a moving foraminous support so that regeneration occurs prior to and after the filament tow is overfed onto the moving support.

Abstract: Variants of the plasminogen activator inhibitor PAI-2 in which the 66-98 amino acid residue region has been altered to eliminate at least one protease sensitive site are provided. The variants of the invention maintain the biological activity of PAI-2 and amino acids up to 65 and from 99 of PAI-2 in frame. The PAI-2 variants of the invention in labelled form, as well as DNA molecules encoding the variants of the invention, transformed host cells expressing the variants of the invention compositions and diagnostic kits comprising the variants of the invention, antibodies against the variants of the invention and processes for the production of the variants, DNA molecules, transformed hosts, compositions and antibodies of the invention are also described.

Abstract: A computer chassis construction for severe environmental conditions enclosing a plurality of circuit cards and a power supply includes a top cover, bottom cover, a pair of side plates and a pair of end plates secured together to form an airtight seal along all abutting edges. A backplane is fixed adjacent the bottom cover mounts a plurality of connectors for electrical connection with mating connectors along a first edge of each of a plurality of circuit cards. Mounting grooves for receiving second, third and fourth edges of each of the plurality of circuit cards are provided to rigidify the assembly. An internal partition separates the plurality of circuit cards from the power supply and the latter is also rigidly secured within the chassis. Integral cooling is provided for both the circuit cards and power supply.

Abstract: This invention relates to PAI-2 and its expression as a recombinant molecule in eukaryotic cell lines as a glycosylated secreted molecule, to the constructs expressing it, to host cells expressing it, to compositions comprising it, to methods of treatment, prophylaxis and diagnosis using it and to antibodies raised against it. The invention also provides a 414 amino acid form of PAI-2 wherein the N-terminal methionine residue is deleted, a 60 kD glycosylated secreted recombinant form of PAI-2 and compositions and methods using these molecules. The invention further relates to a novel synthetic signal peptide.

Abstract: A disengagable adapter for mechanically coupling optical fibers is provid The disengagable adapter separates into two complementary receptacle parts. Each receptacle part receives through a bore a single optical-fiber located within an optical-fiber connector plug. Each receptacle part attaches to and securely holds a different connector plug. The receptacle parts mate with each other in a complementary fashion and thereby connect the two optical fiber connector plugs together. These connector plugs accordingly align the two optical fibers located within the plugs. The optical fibers can be separated either by demating the complementary parts or by disconnecting one side of the adapter from its connector plug. Mounting the complementary parts to a plate facilitates multiple, simultaneous connections.

Abstract: This disclosure relates to the synthesis by application of recombinant DNA technology of recombinant reovirus nonstructural protein sigma NS and its use as a non-specific binding agent for single stranded (ss) RNA's. This property of sigma NS protein can be employed when it is used as a reagent in protecting unstable RNA during extraction processes and more significantly as a reagent for the concentration of (ss) RNA samples for use in hybridization probe assays.

Abstract: A tunnel or shaft lining is installed nondisruptively in a medium such as soil by longitudinally advancing an assembly (10) of tunnel lining sections (12-1 to 12-8) arranged in end-to-end relationship and having an inflatable torus (22- 1 to 22-7) interposed between adjacent sections. Worm-like advancement is effected by simultaneously inflating in sequence the tori 22-1, 22-4, 22-7 etc.; the tori 22-2, 22-5 etc. and the tori 22-3, 22-6 etc., and repeating the inflation procedure as necessary until sufficient advance has been achieved.

Abstract: Pressure responsive piston valve with spring controlled detent balls; a detent pressure spring extends longitudinally through the piston and urges a biasing ball against detent balls which are longitudinally offset from the biasing ball; the detent balls are driven into a detent groove in the cylinder for the piston; pressure on the piston forces the detent balls out of the detent groove; calibrating means for the spring.

Abstract: A photoconductive switching device is disclosed that has an enhanced speed f response so that its closed (low) and open (high) resistive states are obtained in response to optical illumination in the less than nanosecond regime. The enhanced speed of response is achieved by neutron irradiation of a material preferably comprising GaAs:Si:Cu. An application of the improved photoconductive switching devices is disclosed which allows the realization of a high-power, frequency-agile RF source topology.

Abstract: A photoconductive switching device is disclosed that has an enhanced speed of response so that its closed (low) and open (high) resistive states are obtained in response to optical illumination in the less than nanosecond regime. The enhanced speed of response is achieved by neutron irradiation of a material preferably comprising GaAs:Si:Cu. An application of the improved photoconductive switching devices is disclosed which allows the realization of a high-power, frequency-agile RF source topology.