Abstract: A local area network cable capable of high speed signal transmission has a plurality of twisted pairs of conductors enclosed within a jacket. Each of the twisted pairs has a different twist frequency than any of the other pairs, and at least one of the pairs has a direction of twist that is different from the other twisted pairs, that is, it may have a right hand twist where the other pairs have a left hand twist. In a four pair cable, two of the pairs, of different twist frequency, have imparted thereto a right hand twist, and two of the pairs have a left hand twist.

Abstract: A cabling media which is suitable for high performance data transmission includes a plurality of metallic conductors-pairs, each pair including two plastic insulated metallic conductors which are twisted together. The present invention describes how the selection and incorporation of metallic conductors having different diameters within a single communication cable can significantly enhance the operational performance of the cable. More specifically, given a first conductor-pair having a certain conductor diameter and twist length, and at least one other conductor-pair with a different twist length, the present invention purposely selects metallic conductors for this other conductor-pair with a different diameter than that of the first conductor-pair so as to ensure that the insertion loss exhibited by the additional conductor-pair is essentially equal to the insertion loss exhibited by the first conductor-pair.

Abstract: A coaxial cable [10, 50] includes an inner conductor [11] that is separated from an outer conductor [13] by a layer of insulating material [12]. The outer conductor includes a thin sheet of metallic foil that envelops the insulating material and has a seam [14] that extends in the longitudinal direction of the cable. In a first embodiment, the insulated conductor is axially rotated (twisted) with respect to its own longitudinal axis. In a second embodiment, the outer conductor is wrapped around the layer of insulating material. In both embodiments, there is relative rotation between the insulated conductor and the outer conductor. This practice is referred to as relative insulated conductor rotation, and it significantly improves the structural return loss characteristics of a coaxial cable when the outer conductor includes an asymmetry, such as a seam, that extends in the longitudinal direction of the cable.

Abstract: A local area network cable capable of high speed signal transmission has a plurality of twisted pairs of conductors enclosed within a jacket. Each of the twisted pairs has a different twist frequency than any of the other pairs, and at least one of the pairs has a direction of twist that is different from the other twisted pairs, that is, it may have a right hand twist where the other pairs have a left hand twist. In a four pair cable, two of the pairs, of different twist frequency, have imparted thereto a right hand twist, and two of the pairs have a left hand twist.

Abstract: A cabling media which is suitable for high performance data transmission includes a plurality of metallic conductors-pairs, each pair including two plastic insulated metallic conductors which are twisted together. The present invention describes how the selection and incorporation of metallic conductors having different diameters within a single communication cable can significantly enhance the operational performance of the cable. More specifically, given a first conductor-pair having a certain conductor diameter and twist length, and at least one other conductor-pair with a different twist length, the present invention purposely selects metallic conductors for this other conductor-pair with a different diameter than that of the first conductor-pair so as to ensure that the insertion loss exhibited by the additional conductor-pair is essentially equal to the insertion loss exhibited by the first conductor-pair.

Abstract: A quadrupole mass spectrometer comprises an ion source (20), a mass filter (22) and an ion collector (24). The ion source comprises an array (30) of quantum wires. The mass filter comprises four glass fibres (32) coated with nickel and the ion collector is an a electrode connected to an integrated complementary metal oxide semiconductor temperature compensated integrated amplifier.

Abstract: An SDH (Synchronous Digital Hierarchy) telecommunications network has a plurality of interconnected nodes (1, 2, 3, 4). Working channels (7,6) are defined between respective pairs of nodes (1,2 and 3,4) with one common protection channel (5) serving a plurality of working channels (5,6) such that in the event of a fault on a working channel traffic signals passing from a first node (3) to a second node (4) along that working channel (6) are switched onto the protection channel (7). The first node (3) is then operative to transmit a channel trace signal along with the traffic signals which serves to identify the respective channel. The second node (4) is operative to monitor for the presence of a channel trace signal on the protection channel (7) for which it is the terminating node and upon detection thereof to switch traffic signals associated with that trace signal on the protection channel (7) into the second node (4) for connection to an onward destination.

Abstract: A cabling media which is suitable for data transmission with relatively low crosstalk includes a plurality of metallic conductors-pairs, each pair including two plastic insulated metallic conductors which are twisted together. The characterization of the twisting is important and relates to parameters such as twist length as well as core strand length/lay. More specifically, particular combinations of twist lengths and core strand length/lay are purposely selected for each insulated pair of the cable in order to achieve performance capabilities that significantly surpass those required under TIA/EIA-568A. In one particular embodiment of this invention, a cable comprises as its transmission media, four twisted pair of individually insulated conductors with each of the insulated conductors including a metallic conductor and an insulation cover which encloses the metallic conductor.

Abstract: Enantiomeric or enantiomerically enriched H.sup.+ K.sup.+ ATPase inhibiting pyridinylsulfinyl--benzimidazoles are prepared using microorganisms or microbial enzyme systems to enantioselectively biooxidize corresponding prochiral sulfide compounds and isolating the pharmaceutically active enantiomer or enantiomerically enriched sulfoxide form.

Abstract: A compound of formula (II), either as a single enantiomer or in an enantiomerically enriched form ##STR1## wherein: ##STR2## and ##STR3## (wherein N in the benzimidazole moiety of Het.sub.2 means that one of the carbon atoms substituted by any one of R.sub.6 to R.sub.9 optionally may be exchanged for an unsubstituted nitrogen atom; R.sub.1, R.sub.2 and R.sub.3 are the same or different and selected from hydrogen, alkyl, alkoxy optionally substituted by fluorine, alkylthio, alkoxyalkoxy, dialkylamino, piperidino, morpholino, halogen, phenylalkyl, phenylakoxy; R.sub.4 and R.sub.4, are the same or different and selected from hydrogen, alkyl, aralkyl; R.sub.5 is hydrogen, halogen, trifluoromethyl, alkyl, alkoxy; R.sub.6 -R.sub.9 are the same or different and selected from hydrogen, alkyl, alkoxy, halogen, haloalkoxy, alkylcarbonyl, alkoxycarbonyl, oxazolyl, trifluoroalkyl or adjacent groups R.sub.6 -R.sub.

Abstract: The preferred embodiment of the cable disclosed includes seven groups of twisted-pairs, outlined in dashed lines in FIG. 1. Groups 12, 14, 17 and 19 have four pairs each, and groups 13, 16 and 18 have three pairs each. Six of the groups, namely 12, 13, 14, 16, 17 and 18 are referred to herein as the outer groups since they are collectively twisted and wound helically about the seventh group 19 which is centrally located throughout the length of the cable. Each of the groups of twisted pairs may be held together by a cable binder such as nylon yarn 22. The core thus formed is enclosed within a jacket 23, and the entire assembly is referred to in the art as a "honeycomb" structure. In accordance with the present invention, the twisted pairs of each of the six outer groups are insulated with a fluorinated ethylene-propylene copolymer (FEP) material such as, for example, Teflon.RTM., while the twisted pairs of the central group are insulated with a high density polyethylene (HDPE) material.

Abstract: A fluid flow control system in which a vortex valve is combined in series with a non-fluidic control valve. The non-fluidic control valve is upstream of the vortex valve and is so arranged that small changes in its state control the operation of the vortex valve, which provides the major control over the flow of the fluid. Erosion in the non-fluidic valve due to abrasion or cavitation in the non-fluidic valve is thereby reduced.

Abstract: An intramedullary intertrochanteric fracture fixation appliance comprising an intramedullary rod having an angulated opening to receive a femoral neck screw, said rod having a co-axial bore extending into said angulated opening, anti-rotation means located in said bore to selectively prevent rotation of said neck screw in the rod and the open end of said bore being provided with means to positively locate a removable fitting device on the proximal end of the rod and so that said anti-rotation means can be operated with the fitting device in position.

Abstract: This invention relates to a process for producing polyamides of high molecular weight from dicarboxy terminated prepolymers of relatively lower molecular weight by further polymerization in an extruder in the presence of an additive comprising a diamine.The polyamides so formed are suitable for producing fabricated articles such as films, pipes, containers etc.

Abstract: Cavitation takes place in a fluid flow passing through a constriction, such as a reduced bore in a pipe, to release dissolved gases. The gases can be collected and the fluid can flow along a diffuser section to recover pressure. The constriction can be formed by the axial outlet part of a votex valve included in the flow line. Cavitation in the fluid can be regulated by the control fluid supplied to the vortex valve.

Abstract: A device for illuminating residence information. More specifically, it relates to a device which can be quickly and easily installed on a new or existing vertical lamppost and connected to a power supply for illuminating the resident's name and/or street number.

Abstract: This invention relates to an adhesive composition comprising (a) an acrylic functional urethane elastomer, (b) an acrylic monomer, (c) an organic sulphimide, an organic sulphinate or a salt thereof, (d) a peroxide initiator and (e) a tertiary amine curing accelerator. Component (e) preferably has at least two tertiary nitrogen atoms in its structure and is a reactive organic dye. The adhesive composition is curable aerobically, has faster curing rates than achieved hitherto and shows improved bond-strengths when compared with convetional tertiary amine curing accelerators.

Abstract: A fluidic diverter comprising a housing forming a chamber having an inlet at one end and two diverging outlets at the opposite end. An asymmetric configuration is produced within the chamber by axially spaced steps in opposing walls of the chamber and a single control port communicates with the chamber at a position associated with the step adjacent the inlet. In use and in the absence of a control at the control port, flow will emerge through the outlet at the side of the chamber associated with the control port. A fluidic pumping system includes a fluidic pump having the fluidic diverter in a delivery line of the pump.

Abstract: A rechargeable battery pack includes at least a power cell and a substantially sealed housing adapted to permit venting therefrom of increased internal housing pressure while normally maintaining a substantially air-tight closure. A novel charge status indicator for integration with the battery pack provides a positive indication of the substantially fully charged status of the power cell.