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3836849 |
METHOD FOR CLASSIFYING PARTICLES
To enhance the selectivity of the electronic classification of particles which are to be sensed in an electronic field which includes a high frequency energization and which thereby employs the...
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3833852 |
INSPECTION HEAD MOUNTING APPARATUS
Apparatus to allow mounting of an inspection head such that its front face is parallel to and a fixed distance from an article to be inspected. In one type of device for measuring the thickness of...
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3833851 |
SYSTEMS FOR MEASURING THE PROPERTIES OF PLASMA WITH AN ION PROBE
An ion source generates a heavy-ion beam of uniform ion velocity which is utilized to probe plasmas. The beam is scanned through a plane by deflection plates and the angle of scansion for the beam...
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3831087 |
BIOLOGICAL CELL ANALYSIS
The observation of native biological cells, particularly blood cells, suspended within a test liquid according to a technique based on the discovery that the resistivity of native cells in the path...
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3823372 |
METHOD AND APPARATUS FOR MEASURING THE TOTAL SURFACE AREA CONCENTRATION OF PARTICLES ENTRAINED IN A GAS
The total surface area concentration of particles entrained in a gas is determined by measuring the original and residual currents resulting from a low-intensity gaseous ion source operating in a...
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3820020 |
PARTICLE STUDY APPARATUS INCLUDING AN AXIAL TRAJECTORY SENSOR
A sensor for use with apparatus operating in accordance with the principles of the Coulter electronic particle studying device for differentiating between particles passing on axial or nearly axial...
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3818207 |
APPARATUS FOR CONVERTING A MEASURING VOLTAGE INTO VALUES NOT PROPORTIONAL THERETO
The invention relates to an apparatus for converting a measuring voltage into a second voltage which is not proportional to the measuring voltage. The apparatus comprises a first linear circuit...
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3816713 |
ELECTRICAL DEPLATING READ-OUT APPARATUS
An electrical deplating read-out apparatus wherein the deplating current is preselected to give an indicated value of total deplating current in milliampere-second units.
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3815022 |
METHOD AND APPARATUS FOR MEASURING SMALL ASPHERICAL PARTICLES
Method and apparatus for measuring size and asphericity of small aspherical particles is disclosed. Particles to be measured are urged through a long cylindrical pore whose diameter is greater than...
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3815023 |
PULSE WIDTH STABILIZING METHOD AND APPARATUS
A method and apparatus for stabilizing the widths of particle pulses produced by a Coulter type scanning aperture. The apparatus includes circuitry for sensing the widths of the particle pulses and...
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3815024 |
PARTICLE ANALYZER
An apparatus and method for electrophoretically driving solution-suspended small particles through a pore in a membrane and means for counting, sizing and characterizing the particles is disclosed....
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3812425 |
METHOD AND APPARATUS FOR DETERMINATION OF HEMATOCRIT
A diluted blood sample is passed through a blood cell sensor of the type that provides an electric pulse having a peak amplitude corresponding to the volume of each sensed blood cell and a pulse...
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3810011 |
APPARATUS AND METHOD FOR ANALYZING THE PARTICLE VOLUME DISTRIBUTION FOR A PLURALITY OF PARTICLES OF DIFFERENT SIZE IN A QUANTITY OF LIQUID
The apparatus and method are utilized for ascertaining the volume of particles within predetermined particle-size ranges from a total amount of particulate matter comprising particles of different...
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3810009 |
APPARATUS FOR MEASURING MATERIAL FOULING OF A TEST SPECIMEN
An apparatus and method for measuring material buildup or fouling on a test specimen in which at least a portion of a temperature sensitive voltage output means is located proximate to a test...
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3810010 |
PARTICLE ANALYSIS METHOD AND APPARATUS WHEREIN LIQUID CONTAINING PARTICLES IS SUCKED INTO A CONSTRICTED FLOW PATH
An apparatus for determining the relative quantities of different sized particles contained in a liquid, for example the relative number of red and white blood corpuscles, by measuring the...
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3801903 |
PARTICLE STUDY APPARATUS INCLUDING AN AXIAL TRAJECTORY SENSOR
Apparatus for use with apparatus operating in accordance with the principles of the Coulter electronic particle studying device, for differentiating between particles passing on axial or near axial...
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3801904 |
PARTICLE STUDY APPARATUS INCLUDING AN AXIAL TRAJECTORY SENSOR
Apparatus for use with apparatus operating in accordance with the principles of the Coulter electronic particle studying device, for discriminating between signals from particles passing on axial...
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3800220 |
AUTOMATIC APPARATUS FOR COUNTING SUSPENDED PARTICLES IN LIQUIDS
An automatic apparatus is disclosed for counting suspended particles in liquids. The apparatus comprises a first vessel having a sample of test fluid contained therein. A second vessel is adapted...
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3793587 |
PARTICLE VOLUME AND CROSS-SECTION MEASUREMENT
An apparatus for counting and classifying particles suspended in a test liquid, wherein two measuring openings are aligned, are spaced from one another, and dimensioned differently, such that a...
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3791792 |
POLYMER CURE DETERMINATION METHOD
A pair of electrodes formed of dissimilar metals are placed in an uncured resin. As the resin cures, the material produces a dc potential up to several hundred millivolts. The potential can be...
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3789298 |
BEAM SCANNER
A beam scanning electrode is mounted on a rotor and is movable repeatedly across a beam of high energy particles when the rotor is rotated. The scanning electrode is mounted within a beam tube...
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3784909 |
PICOSECOND BEAM MONITOR
Current in the beam of a particle accelerator is monitored with picosecond resolution by causing the beam to impinge upon the center conductor of a coaxial line, generating a pulse of...
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3783376 |
PARTICLE COUNTER HAVING REMOVABLE APERTURE SLIDE
An aperture slide receptacle has a top and a bottom plate spaced apart. Each plate has a circular depression formed therein for receiving an O-ring. Said depressions and O-rings are juxtaposed so...
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3781675 |
SELF PRIMING CONDUCTIVITY CELL
A conductivity cell for use in a system for counting particles suspended in a liquid and operative to reliably and accurately count such particles even in the presence of gas bubbles in the liquid...
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3772593 |
RESISTANCE MEASUREMENT SYSTEM
A resistance measurement system for measuring the change in the value of a resistance. An input circuit provides an output signal proportional to the value of the resistance. The output of the...
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3771058 |
SCANNER ELEMENT FOR COULTER PARTICLE APPARATUS
The scanner element or aperture tube of a Coulter particle apparatus has a wafer in which the aperture is formed, the wafer being made of a material which has electrical insulating properties but...
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3764901 |
METHOD OF AND MEASURING CHAMBER FOR MEASURING PROPERTIES OF PARTICLES SUSPENDED IN LIQUID
In a measuring chamber, in a space immediately upstream of a measuring opening, there are disposed, for each measuring step, at least two entrance tubules from which particle suspensions are...
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3764900 |
ELECTROLYTIC ELECTRICAL FIELD MAPPING DEVICE
The device includes a plotting board which overlies an electrolyte tank and on top of which a sheet of graph paper is positioned for plotting the electrical field distribution between electrodes...
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3763429 |
APERTURE TUBE ASSEMBLY
An assembly which includes a plurality of particle counting and sizing aperture tubes for use with a particle analyzer of the Coulter Type, the tubes being mounted on a turret structure to enable...
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3763428 |
SIMULTANEOUS MEASUREMENT OF THE SIZE DISTRIBUTION OF AEROSOL PARTICLES AND THE NUMBER OF PARTICLES OF EACH SIZE IN A FLOWING GASEOUS MEDIUM
A method and apparatus are described for measuring the size distribution of aerosol particles in a gas stream and the number of particles of each size. Particle-laden gas flows through the...
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3757213 |
PARTICLE SIZE ANALYZING APPARATUS AND METHOD USING THRESHOLD LEVEL CONTROL
The analog electrical signals from a Coulter type electronic particle analyzing apparatus are applied to a voltage-to-charge converter, only those signals having amplitudes which exceed a...
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3746977 |
APERTURE TUBE ASSEMBLY FOR A PARTICLE STUDY APPARATUS
An assembly which includes a plurality of particle counting and sizing aperture tubes for use with a particle analyzer of the Coulter type. The assembly includes a rotatable, turret-like fitting...
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3745455 |
CURRENT NORMALIZER FOR PARTICLE SIZE ANALYSIS APPARATUS
A current normalizer utilizes a pair of parallel, simultaneously programmed current generators to provide a DC current and a synthetic particle current pulse to an electric particle sensing zone...
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3742348 |
NOISE FREE SMALL PARTICLE ANALYSIS
Certain characteristics, e.g., electrophoretic mobility and number or volume of particles in an electrolyte may be measured according to a method which successfully eliminates the effect of system...
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3739267 |
APPARATUS FOR DETECTING CONDUCTIVE MATERIAL UTILIZING A VAPOR LAMP
Apparatus for detecting conductive material, particularly a build-up at the end of a conveyor, includes a vapor lamp, an electrically conductive means around at least a portion of the lamp...
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3739268 |
PARTICLE SENSING APPARATUS, METHOD AND FLOW DIRECTION COLLAR THEREFOR
A flow direction collar is positionable in an electrical zone sensing apparatus with an elongated bore therein disposed in substantial alignment with an aperture through which particles carried by...
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3739258 |
METHOD AND APPARATUS FOR DETECTING AND SIZING MICROSCOPIC PARTICLES
Improved accuracy of size measurement and size distribution of particles in a fluid have been obtained in an electrical zone sensing apparatus by a flow control director means which directs the...
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3733547 |
METHOD AND APPARATUS FOR MEASURING PARTICLE CONCENTRATION IN A FLUID SUSPENSION OF PARTICLES
The apparatus includes (1) a Coulter type particle analyzing device for producing a particle pulse each time a particle is in a sensing zone, each particle pulse having poorly defined leading and...
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3733546 |
BEAM CURRENT POSITION, INTENSITY AND PROFILE MONITORING BY RESISTIVE DETECTION OF BEAM IMAGE WALL CURRENTS
A monitor for detecting the position, intensity and profile of a pulsed charged-particle beam moving through a beam pipe, including a pair of electrically conductive flanges inserted in the pipe,...
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3733548 |
APPARATUS AND METHOD FOR MEASURING PARTICLE CONCENTRATION OF A SUSPENSION PASSING THROUGH A SENSING ZONE
Apparatus and method for measuring particle concentration in a fluid suspension by obtaining signals from a sensing zone and relating the duration of time occupied by the particles in suspension...
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3728622 |
METHOD OF AND APPARATUS FOR MEASURING IN SITU THE FORMATION FACTOR
A method of and apparatus for measuring in situ the formation factor is disclosed. The formation factor is the ratio of the resistivity of a water saturated sediment to the resistivity of the...
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3718970 |
ELECTROMECHANICAL TRANSDUCER PROCESS
A method of manufacturing a device such as a resonant reed device having an enclosed mechanically displaceable conductive member with a controlled atmosphere within the enclosure, the method...
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3714565 |
ELECTRONIC PARTICLE ANALYZING APPARATUS WITH IMPROVED APERTURE TUBE
An aperture tube for use with a Coulter type particle analyzing device is constructed with its interior surface covered with conductive material such as metal, its exterior surface covered with...
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3714564 |
DROPLET SIZING AND DETECTING APPARATUS AND METHOD USING A MAGNETIC RECORDING
An aerosol droplet detecting and sizing apparatus and method which comprises exposure to an aerosol of a portion of magnetic recording tape, the binder of which is soluble in the droplet material...
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3705348 |
METHOD OF AND AN APPARATUS FOR DETERMINING THE LENGTH OF FIBERS SUSPENDED IN A LIQUID
A method of measuring the length of fibers suspended in a liquid which, together with a physical flux, flows through the measuring opening of a measuring device. This device comprises a passage...
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3701010 |
METAL WEIGHT COUNTER
An instrument for measuring and indicating the weight of a material, in particular metals, converted in an electrolytic bath. In the instrument a voltage proportional to the current flowing through...
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3699439 |
ELECTRICAL PROBE-POSITION RESPONSIVE APPARATUS AND METHOD
Position responsive apparatus is disclosed comprising a sheet of substantially uniform resistivity having first and second parallel, linear electrodes in electrical contact therewith. A movable,...
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3689833 |
PARTICLE ANALYZING APPARATUS
Electronic particle analyzing apparatus operating in accordance with the Coulter principle in which it is desired to isolate the aperture electrically from the electrolyte or suspending fluid flow...
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3688191 |
ELECTRONIC PARTICLE STUDY APPARATUS WITH FLUID CIRCULATING SYSTEM
Electronic particle study apparatus for studying particles, particularly those whose density and size make difficult maintenance of a dispersion in a fluid medium and which permits total sample...
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3681687 |
A SUPERCONDUCTOR DEVICE FOR USE IN MOVING BODIES FOR NAVIGATION PURPOSES TO DETERMINE THE CHANGE IN ORIENTATION THEREOF USING THE SAGNAC EFFECT
Device for generating electric pulses on superconductor loops particularly for instrumentation to determine the position and change of position of aircraft and spacecraft. An adapter preferably of...
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