Abstract: A magnetomechanical gas analyzer such a paramagnetic oxygen analyzer which has a dumbbell which is rotatably suspended in the region of action of an inhomogeneous magnetic field and around which a gas to be measured flows. The dumbbell is connected, fixed in rotation, to a mirror for deflecting a light beam. In order to damp in the analyzer all kinds of oscillations which have a negative effect on stability in the balance point, and to increase the detectability and the speed of the measurement, there are least two electrically conductive surface segments which are essentially perpendicular to one another are arranged for eddy-current damping on the dumbbell or in the mechanical gearing on the dumbbell and in the region of action of the inhomogeneous magnetic field. One of the surface segments may be the mirror.

Abstract: The method of the invention makes it possible to determine the hydrocarbon flow rate Qhe in an oil well in production, by causing data acquisition apparatus to pass along the well once only, the data acquisition apparatus being provided with local sensors making it possible to distinguish between water and hydrocarbon. During the single pass, the hydrocarbon bubble count Bc per unit time, the water holdup Hw in the fluid, and the flow section A of the well are measured.

Abstract: A manual sample injector for a gas chromatograph comprises a syringe holder, a plunger driver including a volume-adjust assembly, an injection port interface, a release lever, and a force-calibration spring. The holder, driver, and interface collectively include guide rod and respective apertures so that the driver and interface can slide vertically relative to the holder. Pre-injection steps provide that the desired volume of sample is ready for injection. Injection steps include: mounting the injector on an injection port by sliding the port interface over a septum cap of the injection port, manually pushing the plunger driver, and thus the syringe holder, down against the resistance of the force-calibration spring until an actuator element of the port interface contacts the cocked release lever, increasing the downward force on the plunger driver so that the release lever is forced to a release position.

Abstract: A viscometer for sensing or characterizing the stress required to shear a fluid at a given rate includes a pair of members coaxially mounted for relative rotation. Between the members is an annular gap defining a flow path for the fluid. The flow path is configured such that during differential rotation of the members, fluid is caused to flow through the annular gap that is a function of the differential rotation and the viscosity of the fluid. A sensor measures the torque or torque equivalent required to achieve such differential rotation between the members.

Abstract: A method of determining the real time bubble point pressure of a fluid originating from a subsurface earth formation using an adjustable choke positioned downhole adjacent to the formation. The adjustable choke is placed into communication with the wellbore fluid flowing from the formation to the surface. The adjustable choke has a remotely adjustable choke opening for selectively restricting the flowrate of the fluid flowing through the choke. The adjustable choke has a pressure sensor for measuring the fluid pressure downstream of the choke opening. The method includes obtaining downstream fluid pressure data as a function of choke size for generating a plot of downstream pressure versus choke size data which exhibits substantially linear behavior having two different slopes.

Abstract: A method for detecting improper venting of a combustion appliance within an interior space relies upon a carbon dioxide detector to determine whether a preselected criterion indicative of improper venting is exceeded. The preselected criterion can be a threshold concentration of carbon dioxide or a threshold level of rate of rise of carbon dioxide concentration that is exceeded at a specified time or over a specified interval of time. The method can be used to detect leaks in a residential furnace, at very low levels, during start up of the furnace by measuring the preselected criterion in a heated air duct.

Abstract: A suspension of a starch-containing product in heated during agitation, whereby the viscosity is registered as a function of the temperature. A curve over the relationship between viscosity an temperature is treated as a property profile for the sample and is compared with another known curve in order to determine the heating properties for the sample. A device for this analysis has an agitator (7), the drive means (10, 11) of which has a power sensor (12) for sensing the power which the agitator is subjected to during the agitating, whereby a measure of the viscosity is obtained. A temperature sensor (13) senses the temperature of the sample.

Abstract: An apparatus for detecting a leak in an isolated segment of a pipe with a known fluid: The apparatus includes a mechanism for producing a pressure pulse in the pipe. The producing mechanism is adapted for connection to the pipe. The apparatus includes a mechanism for sensing the reflection of the pulse in the pipe and a pressure sensor for sensing the pressure in the pipe. The pressure sensor is adapted for connection to the pipe. The apparatus includes a mechanism for determining whether the pressure of the fluid in the pipe has negatively deviated from an expected pressure-temperature relationship of the fluid in the pipe. A method for detecting a fluid leak in an isolated segment of a pipe: The method consists of five steps: Step 1, measure the average propagation velocity of the fluid in an isolated segment of the pipeline at time t1. Step 2, measure the pressure of the fluid in the isolated segment of the pipe at time t1.

Abstract: Methods and apparatus are provided for detection of leaks in boilers containing a temperature control liquid which is supplemented with feedwater and removed as blowdown, main steam and sootblower steam. In a preferred embodiment, the boiler has an automatic liquid level control mechanism. The methods include measuring rates associated with feedwater supplementation and removal, correcting for the offsets between the supplementation and removal rates, determining the unaccounted for water rate, and comparing the unaccounted for water rate with zero to determine if a leak condition is present.

Abstract: An apparatus and method for sealing the bottom of an optical waveguide draw furnace is disclosed. The apparatus includes an assembly constructed and arranged to mate with the bottom of the draw furnace to form a seal, and a leak detection system communicating with the assembly to signal the forming of a proper or an improper seal. The covering plate of the assembly is selectively seated on the sealing plate of the draw furnace to form the seal, and an inert gas is delivered between the covering plate and the bottom of the draw furnace. The flow of the inert gas is detected to determine if the seal has been properly formed. An assembly including a covering plate having at least two radially spaced gaskets circumferentially positioned on the top surface of the covering plate for engagement with the sealing plate at the bottom of the draw furnace, and a method for sealing the bottom of a draw furnace are also disclosed.

Abstract: A method for product assurance for semiconductor devices having wire bonded die and carrier assemblies comprises “puffing” the arc of each bonded wire individually with a stream of gas to force the wire arc into a substantially vertical plane which is positioned laterally away from adjacent wire arcs. The “puff” may be accomplished by a stream of compressed gas from a nozzle positioned beneath the wire or alternatively, by a vacuum drawn from a nozzle positioned above the wire arc, or by both techniques. The force exerted is sufficient to debond defective bonds, break structurally deficient wires and move debonded wires or broken wire ends away from the die, lead frame and other wires. The method is preferably applied just following wire bonding andlor just prior to encapsulation of the die.

Abstract: The present invention relates to a method and apparatus for measuring the properties of a composition or a component thereof used in the processing of a paper or board web. According to the invention, a sample of the composition to be measured is taken into a measurement apparatus, the composition is measured at least for its density, viscosity, dry solids content and gas content, and is then passed out from the measurement apparatus.

Abstract: A method and system for multiple microphone photoacoustic leak detection and localization. The leak detection technique uses photoacoustic sounds produced by the interaction of a carbon dioxide (CO2) laser turned to 10.6 microns and a photoactive tracer gas, sulfur hexafluoride (SF6), emitted by calibrated leak sources. As the leaked gas is heated by the laser, it expands and launches a photoacoustic sound pulse. The sound pulses generated by the scanning process are recorded across a broad bandwidth by multiple ultra-sensitive microphones. After the photoacoustic pulses arc recorded, the magnitude is compared with background noise measurement at several frequencies for a determination if a leak is present. If the presence of a leak is found, then the location of the leak is determined. The recorded sound is processed by using Matched Field Processing (MFP) as the signal processing technique.

Abstract: Leakage of engine coolant into the engine lubricating oil can be detected to high sensitivity levels by dissolving a glycol-soluble salt of 86Rb as a tracer in the coolant and detecting the beta or gamma ray radiation from the tracer containing coolant in a suspected leakage path or in the lubricating oil. A useful application of this detection method is in the region of the head gasket (i.e., between the cylinder block and cylinder head) of a liquid-cooled internal combustion engine.

Abstract: A system for analysis of vapor constituents in a gaseous and/or liquid media includes an analyzing gas chromatographic unit, an in-line preconcentrator assembly having a trap housing, an adsorbent material received in the trap housing, and a transfer line unit couplable to the trap housing and directly connected to the analyzing unit. Carrier mechanism drives the trap housing with respect to the transfer line unit linearly or along an arc trajectory. When the trap housing is displaced from the transfer line unit, the media surrounding the trap housing is forced inside of the trap housing by a pump and vapor constituents are adsorbed on the adsorbent material within the trap housing. When the trap housing is moved in pressure tight engagement with the transfer line unit, the adsorbent material is heated to release the vapor constituents from the adsorbent material.

Abstract: A lined tubular system and method provides for the manipulation and control of annular fluids tubular and the liner. This structure allows for profiling of the exterior wall of a liner such that one or more continuous channels are provided along the length of the lined tubular system. The system may also include one or more non-crushable members or tubes between the liner's exterior surface and host tubular's interior surface. Rounded, granular particles in the annulus between liner and host may provide an alternative path for fluid flow. The particles may be uniformly or randomly distributed in the annulus.

Abstract: The present invention presents a method that effectively provides the near real-time advantage of annular pressure while drilling (APWD) measurements taken during pipe connections that require the mud circulation pumps to be turned off (a “pumps-off” condition). APWD data, such as pressure measurements, are obtained from instruments and related electronics within the bottom-hole assembly (BHA). APWD data can be measured, stored and even processed in the BHA during a pumps-off condition for subsequent processing or communication of a reduced amount of data to the driller at the surface.

Abstract: A device for detecting hidden delaminations in a structure subject to hidden delaminations comprising a rotary percussion tool head adapted at an end thereof to connect to an extension pole, wherein said head comprises at least one circular member, each circular member having on the periphery thereof projections extending in the radial direction and spaced apart in the circumferential direction, and a method of using same.

Abstract: An ultrasonic manipulation apparatus has a plurality of ultrasonic wave oscillators arranged in two dimensions to trap, fix or move particles to an optional position in the solution or perform cell fusion by using a gradient force obtained by superposing one over another the gradient force fields generated by ultrasonic waves produced by a plurality of ultrasonic wave oscillators. The ultrasonic wave oscillators, functioning independently of one another, can emit ultrasonic waves with optional intensities and phases, and by using an external force produced by superposed gradient force fields generated by ultrasonic waves, particles are handled easily.

Abstract: A leakage inspection method and apparatus having a pressure wave generating means, including an air supply source, a regulator, and a solenoid valve. A pressure wave of a fluid is applied to a normal flow path of an measurement object by the pressure wave generating means to detect internal leakage by measuring, by means of a microphone, a difference between the transfer time during which the pressure wave passes through the normal flow path and the transfer time during which the pressure wave passes through the leakage flow path. Accordingly, the internal leakage of the fluid, flowing in the leakage flow path bypassing the normal flow path of an equipment having a partition and the normal flow path separated by the partition, is detected, if any.