Patents

Patents

The relative amounts of liquid phase versus vapor phase of a mixed phase conductive fluid, such as boiling water, is determined by conductivity measurement taken in several distributed directions overlapping within the cross section of a flow path by providing a rotating field vector therein with an alternating voltage on the order of 1-30 kilohertz, with conductivity measurement produced by the rotated field being divided by a liquid conductivity measurement to determine liquid fraction (and by subtraction from unity, vapor fraction), the rotating electrical field being produced by application.

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List of Individual Patents

Patent Number: 4063153
Title: Vapor liquid fraction determination
Inventor: Dechene, Ronald L., Boxford, MA; Grimaldi, Frank G., Tewksbury, MA; Newton, Robert E., Tewksbury, MA
Date: Tuesday, December 13, 1977 (All day)
The relative amounts of liquid phase versus vapor phase of a mixed phase nonconductive fluid such as oil or fuel; or the relative amounts of solids versus gas of a mixed flow of nonconductive particles and gas such as pneumatically conveyed plastic pellets and other material is determined by capacitive measurement taken in several distributed directions overlapping within the cross section of a flow path by providing a rotating electric field therein with an alternating voltage on the order of 10-100 kilohertz, with capacitive measurement produced by the rotated field being proportional to

Patent Number: 4074184
Title: Nonconductive vapor/solid or liquid fraction determination
Inventor: Dechene, Ronald L., Boxford, MA; Grimaldi, Frank G., Tewksbury, MA; Newton, Robert E., Tewksbury, MA
Date: Tuesday, February 14, 1978 (All day)
Liquid with solid or gas phases mixed therein is measured as to liquid and non-liquid volume percent by application of an oscillating voltage to the liquid and separation of resultant conductive and capacitive currents to achieve valid and effective measurement of the latter, unmasked by the larger conductive currents obtainable in the mixed phase medium analyzed.

Patent Number: 4288741
Title: Electrical measurement of fluid void fraction for fluid having capacitive and resistive conductive components
Inventor: Dechene, Ronald L., Boxford, MA; Newton, Robert E., Tewksbury, MA
Date: Tuesday, September 8, 1981 (All day)
Measuring of mixed phased flows to determine flow regime through the use of circumferentially shifted electric fields and measurement of resultant diametral and chord conductances with certain combinations of ratios of diametral to cord conductances serving as a signature of flow regime.

Patent Number: 4291273
Title: Flow regime detecting
Inventor: Dechene, Ronald L., Boxford, MA; Grimaldi, Frank G., Tewksbury, MA; Newton, Robert E., Tewksbury, MA
Date: Tuesday, September 22, 1981 (All day)
Flow measuring apparatus comprising a probe (1) coupled via a coaxial cable (2) to control circuitry with a current to voltage convertor (10), absolute value circuit (12), auto zero switch and integration (11, 27) and voltage to current circuit (18) yielding an analog output, corresponding to flow at the probe.

Patent Number: 4714890
Title: Flow measuring apparatus (Triboelectric) with analog, essentially linear output
Inventor: Dechene, Ronald L., Boxford, MA; Newton, Robert E., Tewksbury, MA
Date: Tuesday, December 22, 1987 (All day)
Flow velocity measurement apparatus for cryogenic liquid flowing in a pipe (1) past spaced upstream (12) and downstream (14) electrodes with triboelectric, flow-generated determined signals at the electrodes directed to a cross-correlator (2) which shifts the time bases of the signals relative to each other and reiteratively multiplies the shifted signals until a maximum multiplication product is achieved, the time shift associated with such maximum being flow transit time between the electrodes.

Patent Number: 4774453
Title: Measuring flow of insulating fluids
Inventor: Dechene; Ronald L., Boxford, MA; Smith; Thomas B., Atkinson, NH; Tougas; Gary H., Ipswich, MA
Date: Tuesday, September 27, 1988 (All day)
Flow measuring apparatus comprising a probe (1) coupled via a coaxial cable (2) to control circuitry with a current to voltage convertor (10), absolute value circuit (12), auto zero switch and integration (11, 27) and voltage to current circuit (18) yielding an analog output, corresponding to flow at the probe.

Patent Number: 4904944
Title: Flow measuring apparatus with analog, essentially linear output
Inventor: Dechene, Ronald L., Boxford, MA; Newton, Robert E., Tewksbury, MA
Date: Tuesday, February 27, 1990 (All day)
Magnestic resonance system for industrial purposes comprising sample throughput system (P, LI, V1, V2) magnetic field adjustment (120, 124) and thermal adjustment (134-138 and 142-146).

Patent Number: 5015954
Title: Magnetic resonance analysis in real time, industrial usage mode
Inventor: Dechene, Ronald L., Boxford, MA; Smith, Thomas B., Atkinson, NH; Marino, Scott A., Haverhill, MA
Date: Tuesday, May 14, 1991 (All day)
Pulsed NMR system for industrial purposes comprising sample throughput system (P, LI, V1, V2) magnetic field adjustment (120, 124) and thermal adjustment (134-138 and 142-146).

Patent Number: 5049819
Title: Magnetic resonance analysis in real time, industrial usage mode
Inventor: Dechene, Ronald L., Boxford, MA; Smith, Thomas B., Atkinson, NH; Roy, Ajoy, Danvers, MA
Date: Tuesday, September 17, 1991 (All day)
Particle analysis apparatus (10) in combination with a triboelectric probe (P) and including means (18, 20, 22, 24, 26) to analyze individual particle collisions with the probe as a useful measure of flow conditions--of a fluid with suspended solid particles--in the region of the probe.

Patent Number: 5054325
Title: Flow measurement by collision characterization
Inventor: Dechene, Ronald L., Boxford, MA; Smith, Thomas B., Atkinson, NH; Newton, Robert E., Tewksbury, MA
Date: Tuesday, October 8, 1991 (All day)
Monitoring apparatus (10) of particles in a gas stream comprising a probe (12) and circuit (14) for detecting electrical activity of the probe and an actuator (20) for insertion and retraction of the probe into and out of the stream, the circuit providing periodic measurement of the retracted probe and self-adjustment to compensate for changing probe characteristics. The apparatus also provided probe cleaning and protection means (30, 32, 34, 36), which work in interaction with the self-check instrumentation. The self-check tests include baseline, gain and sensitivity monitoring.

Patent Number: 5095275
Title: Long term particle monitoring
Inventor: Dechene, Ronald L., Boxford, MA; Newton, Robert E., Tewksbury, MA, Girgenti, Russell S., South Hamilton, MA
Date: Tuesday, March 10, 1992 (All day)
A sample holder and compactor system (10), for use in an industrial NMR (or like) instrument, wherein particulate non-uniform samples can be loaded and compacted. The system comprises a tubular holder/compactor member (20) with an internal sleeve (26) and a ram (30), all fabricated from materials that are non- interactive with the excitation NMR fields and do not interfere with the sample analysis and provides a repeatable, simple way of handling disparate materials in routine repeatable ways ensuring reliable NMR analyses.

Patent Number: 5162103
Title: Sample holder compactor for industrial NMR analysis
Inventor: Inventor(s): Dechene, Ronald L., Boxford, MA; Girgenti, Russell S., South Hamilton, MA
Date: Tuesday, November 10, 1992 (All day)
An improved input circuit (9) for accepting a signal from a triboelectric probe (2). The circuitry provides gain, zero and probe contamination information which allows verification of said information without taking the probe and instrument off- line.

Patent Number: 5287061
Title: On line triboelectric probe contamination detector
Inventor: Dechene, Ronald L., Boxford, MA; Newton, Robert E., Tewksbury, MA; Girgenti, Russell S., South Hamilton, MA
Date: Tuesday, February 15, 1994 (All day)
Pulsed NMR system for industrial measurements comprising sample throughout system (P, LI, V1, V2) and user system controls (104) to establish digitized free induction decay curves (C), from which Abragam, Gaussianand exponential components are determined using a Marquardt-Levenberg iteration technique, and using regression techniques to correlate the curve components to the target nuclei.

Patent Number: 5302896
Title: Magnetic resonance analysis in real time industrial usage mode
Inventor: Dechene, Ronald L., Boxford, MA; Smith, Thomas B., Atkinson, NH; Marino, Scott A., Haverhill, MA; Roy, Ajoy K., Danvers, MA
Date: Tuesday, April 12, 1994 (All day)
Pulsed NMR system for industrial measurements comprising sample throughput system (P, LI, V1, V2) and user system controls (104) to establish digitized free induction decay (FID) curves (C), from which fast Gaussian, slower modified Gaussian and exponential components are determined using a Marquardt- Levenberg iteration technique, and using regression techniques to correlate the FID curve components to the physical quantities of the target nuclei.

Patent Number: 5302897
Title: NMR analysis of polypropylene in real time
Inventor: Tache, Ronald J., Malden, MA; Roy, Ajoy, Danvers, MA; Dechene, Ronald L., Boxford, MA; Smith, Thomas B., Atkinson, NH
Date: Tuesday, April 12, 1994 (All day)
A pulsed NMR analysis system and process comprising sample throughput system (P, LI, V1, V2) and user system controls (104) to establish digitized free induction decay curves (C), from which components functions are determined using non-linear regression techniques to correlate the curve components to the target nuclei.

Patent Number: 5319308
Title: Real time magnetic resonance analysis with non-linear regression means
Inventor: Dechene, Ronald L., Boxford, MA; Smith, Thomas B., Atkinson, NH; Marino, Scott A., Haverhill, MA; Tache, Ronald J., Malden, MA; Roy, Ajoy, Danvers, MA
Date: Tuesday, June 7, 1994 (All day)
A pulsed NMR analysis system and process comprising an air curtain (137), sample throughput system (P, LI, V1, V2) and user system controls (104) to establish digitized free induction decay curves (C) , from which components functions are determined using linear or nonlinear regression techniques to correlate the curve components to the target nuclei and to flow rates in plastic including MI and FRR for polyethylene and MF for polypropylene.

Patent Number: 5367260
Title: Apparatus to obtain flow rates (melt index) in plastics via fixed frequency, pulsed NMR
Inventor: Dechene, Ronald L., Boxford, MA; Smith, Thomas B., Atkinson, NH; Marino, Scott A., Haverhill, MA; Tache, Ronald J., Malden, MA; Roy, Ajoy K., Danvers, MA
Date: Tuesday, November 22, 1994 (All day)
Apparatus and process for measuring mass flow of a slurry mixture of two components of materials, such as a flow of catalyst solid particles (the first component) or droplets in a fluid carrier (the second component). The slurry mixture is added to a process stream (10) or batch reactor. The flow velocity and the volume fraction of one component are measured and combined with the known specific gravity, of the component being measured, and the physical dimensions of the pipe, in which the slurry mixture is flowing, to determine the mass flow of the component.

Patent Number: 5396806
Title: On-line mass flow measurement in flowing two component systems
Inventor: Dechene, Ronald L., Boxford, MA; Day, David R., Boxford, MA; Smith, Thomas B., Atkinson, NH
Date: Tuesday, March 14, 1995 (All day)
A pulsed nmr analysis system for polymers materials extracted from industrial processes at a mobility enhancing temperature (at or above glass transition temperature for amorphous polymers, at the crystalline transition temperature for crystalline and semi-crystalline polymers). The sample is measured via nmr techniques and results correlated to viscosity and melt index or melt flow (which are related to average molecular weights).

Patent Number: 5408181
Title: NMR system for measuring polymer properties
Inventor: Dechene; Ronald L., Boxford, MA; Smith; Thomas B., Atkinson, NH; Day; David R., Charlestown, MA; Tanzer; Christian I., Bedford, MA; Marino; Scott A., Haverhill, MA; Tache; Ronald J., Malden, MA; Roy; Ajoy K., Danvers, MA
Date: Tuesday, April 18, 1995 (All day)
A microprocessor (48) controlled triboelectric instrument with probe fouling detection, zero offset adjustments and temperature compensation. The system programmability provides for enhanced operator control and operator monitoring wherein the system may be reprogrammed to advantage to reduce instrument down time.

Patent Number: 5448172
Title: Triboelectric instrument with DC drift compensation
Inventor: Dechene; Ronald L., Boxford, MA; Newton; Robert E., Tewksbury, MA; Swartzentruber; Ron L., Somerville, MA
Date: Tuesday, September 5, 1995 (All day)
Pulsed NMR system for industrial measurements comprising sample throughput system (P, LI, V1, V2) and user system controls (104) to establish digitized free induction decay curves (C), from which Abragam, Gaussian, and exponential components are determined using a Marquardt-Levenberg iteration technique, and using regression techniques to correlate the curve components to the target nuclei.

Patent Number: 5530350
Title: Magnetic resonance analysis in real time, industrial usage mode
Inventor: Dechene; Ronald L., Boxford, MA; Smith; Thomas B., Atkinson, NH; Marino; Scott A., Haverhill, MA; Roy; Ajoy K., Danvers, MA
Date: Tuesday, June 25, 1996 (All day)
This invention relates to a method for MR imaging using a moveable RF receiving coil assembly that is swept over the region of interest to be imaged during the imaging protocol.

Patent Number: 5596275
Title: NMR analysis of polypropylene in real time
Inventor: Dechene; Ronald L., Boxford, MA; Smith; Thomas B., Atkinson, NH; Marino; Scott A., Haverhill, MA; Tache; Ronald J., Malden, MA; Roy; Ajoy K., Danvers, MA
Date: Tuesday, January 21, 1997 (All day)
This invention relates to a method for MR imaging using a moveable RF receiving coil assembly that is swept over the region of interest to be imaged during the imaging protocol. In particular, the method includes: exciting nuclear magnetization in the region of interest by applying radio-frequency (RF) pulses and magnetic field gradients according to a selected imaging protocol, receiving RF imaging signals generated in an RF receiving coil by the excited nuclear magnetization while sweeping the moveable RF receiving coil assembly near the region of interest, wherein the moveable RF receiving coil assembly includes the RF receiving coil and means for repetitively determining a 3D position and a 3D orientation of the RF receiving coil, determining repetitively 3D positions and 3D orientations of the RF receiving coil during the period of receiving of RF imaging signals, reconstructing an MR image of the region of interest from the received MR imaging signals and from the determined 3D positions and 3D orientations of the RF receiving coil. The position determining means preferably includes at least three MR-active microcoils. The invention also relates to a moveable RF receiving coil assembly and to a MR apparatus, both suitable for use in the method of the invention.

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