Fluid flow monitoring

Fluid flow monitoring

Environment International, Vol. 14, pp. I-XVII, 1988 0160-4120/88 $3.00 -i-.00 Printed in the U.S.A. (c) 1989 Pergamon Press plc. All rights reserved...

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Environment International, Vol. 14, pp. I-XVII, 1988 0160-4120/88 $3.00 -i-.00 Printed in the U.S.A. (c) 1989 Pergamon Press plc. All rights reserved.

NEW PATENTS

This Section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent applications filed from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the Pergamon PATSEARCH" online database in accordance with interest profiles developed by the Editors. Further information about Pergamon PATSEARCH" can be obtained from Pergamon Orbit InfoLine Inc., 8000 Westpark Drive, McLean, Virginia 22102 U.S.A. Copies of complete patents announced in this Section are available from Pergamon Orbit InfoLine Inc. for $8 per copy. Payment with order is required. Orders outside North America add $2 for air postage. Order by patent number for Pergamon Orbit lnfoLine only.

4707359 INSECTICIDE COMPOSITION FOR CONTROLLING INSECTS WHICH HAVE AN AQUATIC BREEDING SITE Arnold I McMuUen, Southampton, Hampshire SO2 4AD, United Kingdom An insecticide composition for controlling the breeding of insects (particularly mosquitos) which have aquatic breeding sites comprises two components, the first being either an insoluble monomolecular layer, an insoluble foam layer or a duplex film layer and the second having a toxic action on larvae, the combination of the two components providing a synergistic mixture.

4707412 GLASS HAVING CONTROLLABLE INFRARED TRANSMISSION Harry A Beale A glass sheet is provided with a coating which will automatically reflect infrared radiation if the ambient temperature is above about 45 degrees F.-60 degrees F. and will transmit infrared radiation if it is below about 45 degrees F.-60 degrees F. Such a coating is placed on the exterior surface of the glass. Additionally, the interior of the glass may be provided with a controllable infrared transmittable or reflective layer of material which is activated by means of an electric current transmitted therethrough and which will reflect infrared energy if so energized, but otherwise will transmit such infrared energy. This layer of material is preferably placed on the interior of the glass surface and activated during the nighttime period so that infrared energy is

not transmitted outwardly. Alternatively, the controllable infrared transmittable or reflective layer of material may be positioned both on the exterior and interior of the glass surface.

4707606 PROPORTIONAL COUNTER FOR DETECTING SURFACE CONTAMINATIONS Manfre Keller, Jfederal Republic Of Germana assigned to Kernforschungsanlage Julich Gesellschaft mit beschrankter Haftung Proportional counters for the detection and measurement of radioactive surface contaminations are provided with at least two fiat window faces enclosing an angle and being formed by a thin foil spread or stretched by a framework including thin rods arranged along the inner edges of contacting window faces, to which rods the foil may be adhered. A perforated lattice or grid cage serves in particular to protect the thin window against any contact, the cage provides for a spacing of about double rod thickness between the framework and the controlled surface. Preferred is a polygonal and in particular hexagonal lattice whose grid wires or strips do not lie in the main scanning direction. Particularly convenient for checking pipelines are, for example, cylindrical measuring probes comprising window foils extending over and perhaps adhered to a circularly arranged frame of thin rods.

4708022 FLUID FLOW MONITORING Rodney Johnson, Sussex, United Kingdom assigned to Bestobell Sparling Limited

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New Patents

An interface system (5) for connection to a fluid flow monitoring assembly is described. The monitoring assembly comprises a signal generating assembly and a signal receiving assembly (8,9) for transmitting signals into a flowing fluid and for receiving the signals after transmission through the fluid respectively; and a monitoring assembly (1) for controlling the transmission of signals by the signal generating assembly, sensing the signals received by the signal receiving assembly, and thereby monitoring the fluid flow. The signal generating and receiving assemblies (8,9) are adapted to transmit and receive signals passing through the fluid along at least two paths and the monitoring assembly (1) has one communication port for each transmission path. The interface system (5) comprises first and second converting assemblies linked by a common signal path (6), the first converting assembly (4) being connectable with the communication ports and the second converting assembly being connectable to the signal generating and receiving assemblies (8,9). The converting assemblies (4,7) are arranged to pass first signals along the signal path (6) in response to the receipt of signals from the communication ports or from the signal receiving assembly respectively, the first converting assembly (4) being responsive to first control signals to cause signals corresponding to signals received from the common signal path (6) to be passed to appropriate ones of the communication ports, and the second converting assembly (7) being responsive to second control signals to cause signals to be transmitted into the fluid by the signal generating assembly along appropriate paths.

discharge end of the conduit. The descending stream of comminuted material is traversed by several radial currents of compressed air close to the open lower end of the vessel and the thus treated stream of comminuted solid material descends into a second vessel wherein it is traversed and analyzed by a laser beam or a light beam.

4708791 WATER QUALITY MONITOR John A B Dillard assigned to PJD Associates Inc A pair of probes is disposed in a pipe supplying water that has been treated to reduce inorganic solids to a selected level. A supply voltage is impressed across the probes to create a signal voltage that is a measurement of the ionization potential in the water between the probes. A dip switch and resistors of progressively different values are connected across the voltage source, and one switch of the dip switch is manually closed that represents the upper limit or range of desired dissolved solids. A signal voltage is created by the dip switch resistor, and the probe voltage and the dip switch voltage are supplied to an amplifier. If the difference on the two voltages is high, then a flip-flop energizes a red light indicating excessive solids; and if the difference is small, then the flip-flop energizes a green light showing an acceptable level of solids.

4708485

4708844

APPARATUS FOR MONITORING A STREAM OF COMMINUTED SOLID MATERIAL

REACTOR MONITORING ASSEMBLY

Ernesto Illy, Trieste, Italy assigned to Illycaffe S pA Apparatus for monitoring and analyzing a stream of powdered coal has an upright cylindrical vessel whose upper end receives the end portion of a conduit serving to deliver a stream of comminuted material in a gaseous carrier medium. The end portion of the conduit is coaxial with the vessel and is surrounded by a single annular nozzle or by an annulus of discrete nozzles serving to discharge first currents of compressed air into the vessel at a level above the

William B Kearton, Kenneth Kloes, Joel R Terry assigned to Westinghouse Electric Corp A combined in-core flux detector and thermocouple assembly for a nuclear reactor composed of an outer tube which is sealed at its upper end; an inner tube disposed within, and extending along the length of, the outer tube; a neutron detector means disposed within the inner tube; an element connected to the neutron detector for displacing the neutron detector along the length of the inner tube; and a plurality of thermocouples disposed outside of the inner tube and enclosed within the outer tube.