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Class 374/17 - By change in optical property (e.g., transmission)


Subclass of Class 374 - Thermal measuring and testing
Definition: Subject matter wherein the test is performed by determining
No. of patents: 53
Last issue date: 09/06/2011


1    
NumberTitleIssue Date
8011826Phantom
This invention provides an ultrasonic phantom that can respond to different ultrasonic intensities. Such ultrasonic phantom comprises a gel comprising a low-boiling compound in the form of droplets sealed therein. The invention also provides an assay technique using...
09/06/2011
7350970Dew point measurement method and device for carrying out said method
The invention relates to measuring engineering. In order to increase accuracy by increasing sensitivity, for the inventive dew point measurement method a light flux polarized in the plane of incidence thereof is used and directed towards the condensation surface of ...
04/01/2008
7338203Method for determining vanishing temperature of petroleum product crystals and device therefor
The invention concerns a method for determining the vanishing temperature of petroleum product crystals, characterized in that it comprises the following steps: introducing the sample to be analyzed in a measuring cell (4), arranged in a cryostatic chamber (
03/04/2008
7309864Method for analysing physical and/or chemical properties of the surface layer of a solid body (variants)
According to the method for analyzing physical and/or chemical properties of the surface layer of a solid as per claim 1, the surface layer is activated by a unit irradiation pulse and, when the irradiation is over, is deactivated by keeping the solid at a co...
12/18/2007
7265843Optical detector device for a counter
An optical detector device for a counter, comprising a consumption indicator, formed from a rotating disc (4) with a section called active (4A) and optical elements of the receiver and emitter types opposite the disc. The received signal from which is ...
09/04/2007
7137734Device for measuring quantities of heat while simultaneously measuring the evaporation kinetics and/or condensation kinetics of the most minute amounts of liquid in order to determine thermodynamic parameters
The invention relates to a device for measuring quantities of heat while simultaneously measuring the evaporation kinetics and/or condensation kinetics of the most minute amounts of liquid in order to determine thermodynamic parameters. The aim of the invention is t...
11/21/2006
7077566Methods and apparatus for temperature measurement and control in electromagnetic coils
A method for monitoring temperature in at least one location of an electromagnetic coil assembly having at least one electrical winding. The method includes passing a light through a non-magnetic optical fiber inserted into a sheath that is wound with the electrical...
07/18/2006
7058511Sub-visible cloud cover assessment: VNIR-SWIR
Methods, computer-readable media, and systems are provided for determining whether a data point indicates a presence of a sub-visible cloud using visible near-infrared data and short wavelength infrared data. A data point is selected from an imaging study of an area...
06/06/2006
6976052Spa control system
An improved spa control system is disclosed. The invention describes a spa control system which calculates the time required to heat the water in the spa system to a desired temperature. From that information, the heating rate of the spa system can be determined, an...
12/13/2005
6976234Apparatus and method for measuring characteristics of dynamic electrical signals in integrated circuits
Systems and methods consistent with principles of the present invention allow contactless measurements of voltage characteristics of dynamic electrical signals in integrated circuits. The invention utilizes a signal analysis circuit, such as a voltage comparator, di...
12/13/2005
6966692Cloud point monitoring device
A cloud point monitoring device which includes thermal conductive surface, cooler, temperature sensor, detection volume, detection wall unit, fiber optic cables for transmitting light, lighter emitter, light detector, and a data acquisition and control unit. The clo...
11/22/2005
6965815Spa control system
An improved spa control system is disclosed. The invention describes a spa control system which calculates the time required to heat the water in the spa system to a desired temperature. From that information, the heating rate of the spa system can be determined, an...
11/15/2005
6926439Dew point hygrometers and dew sensors
A dew point hygrometer for determining the dew point of a gas in which a displaceable transparent film is in contact with the gas and forms a condensation surface. The film is placed on a temperature control device controlling its temperature and an optic fiber, emi...
08/09/2005
6830567Method and device for non-invasive regulation of temperature with radiation, especially laser radiation of biological tissue
A method and a system for the non-invasive temperature determination on biological tissue, particularly at the fundus of the eye, treated by a treatment radiation, particularly laser radiation, wherein, during the respective irradiation time, at essentially identica...
12/14/2004
6711518Method for electronically aligning the frequency of an infrared transmitter
A method is provided for aligning the center frequency of an infrared transmitter. The method comprises the steps of: (a) providing a voltage-controlled oscillator for driving the infrared transmitter, where the oscillator is adapted to receive a bias voltage from a...
03/23/2004
6443616Material melting point determination apparatus
A device for determining the melting point of a sample material utilizing an infrared sensor to measure the temperature of the sample material and photocells to detect changes in transmissivity of the sample material at its melting point....
09/03/2002
6250134Apparatus for determining the dew-point and/or the content of vapor in the air
The apparatus for determining the dew-point and/or the content of vapor in the air, particularly for the use in radio sondes, comprises a dew-point mirror assembly, including a source of light, a reflector, a cooling element thermally coupled to the refle...
06/26/2001
6231228Melting point determination apparatus and method
A device and method is disclosed for determining the melting point of a sample material utilizing an infrared thermometer to measure the indicated temperature of the sample material while under pressure as such sample material is being heated. Upon meltin...
05/15/2001
6030115Method of measuring melting temperature of nucleic acid
A method of measuring a melting temperature of a nucleic acid, which comprises a step of monitoring the fluorescent intensity of a mixture of a sample and a probe which is labeled with a fluorescent intercalative dye and contains a base sequence complemen...
02/29/2000
5971609Method of measuring the dew point or frost point of a gas having low water content
A method of determining the dew point or frost point of a gas containing a very small amount of water uses an optical dew point meter having a reflector mirror the temperature of which can be varied from room temperature to any point of -80° C. or below,...
10/26/1999
5933565Optically based method and apparatus for detecting a phase transition temperature of a material of interest
The melting point of a test substance is determined by placing it in a capillary tube within a heated block. The temperature of the block and sample are gradually increased using an electrical heater. The output of a light emitting diode or solid state la...
08/03/1999
5920010Method of determining dew point and a suitable device
The proposed method of determining dew point involves directing the gas under investigation onto a cooled section of an optically transparent body through which a luminous flux is allowed to pass and recording fluctuations in the intensity of the luminous...
07/06/1999
5758968Optically based method and apparatus for detecting a phase transition temperature of a material of interest
The melting point of a test substance is determined by placing it in a capillary tube within a heated block. The temperature of the block and sample are gradually increased using an electrical heater. The output of a light emitting diode or solid state la...
06/02/1998
5683179Apparatus and method for thermoluminescent quench detection for superconducting devices
A quench detector for determining a conductive state in an energized superconductor, including a thermoluminescent quenching sensor in thermal contact with the superconductor and producing a quenching signal corresponding to the conductive state; and a si...
11/04/1997
5651614Cloud point and pour point analyzer
An apparatus and a method for automatic determination of cloud point temperature and pour point temperature of a petroleum fraction. The apparatus is comprised of a receptacle for holding a sample of the petroleum fraction, a light source, a light detecto...
07/29/1997
5615954Apparatus for measuring the dew point or frost point of a gas having low water content
The invention relates to an apparatus for determining the frost point of a gas containing a very small amount of water. The apparatus comprises (I) compartment A made of a good heat conductor; (II) an inlet for the gas to be measured, which inlet is provi...
04/01/1997
5482371Method and apparatus for measuring the dew point and/or frost point of a gas having low water content
A method of determining the dew point of a gas containing a very small amount of water using (1) a reflector mirror the temperature of which can be varied from room temperature down to at least -80° C.; (2) a source of condensed rays of light for irradia...
01/09/1996
5470154Method of cleaning the reflector mirror in an optical dew point meter and an optical dew point meter equipped with a cleaning device
A method of cleaning a reflector mirror in an optical dew point meter that measures the dew point or frost point of a sample gas by a process including the steps of bringing the sample gas into contact with the reflector mirror whose temperature is variab...
11/28/1995
5251274Optical fibre cable for detecting a change in temperature
An optical fibre cable has an optical fibre with a core and cladding that is embraced by a cover of polymer material. In a limited temperature detection range the polymer material has a negative coefficient of heat expansion, the absolute value of which i...
10/05/1993
5209566Dynamic thermomechanical analyzer
A testing apparatus (dynamic thermomechanical analyzer) for analyzing a change of the state of a sample from a fluid state to a solid state. The dynamic thermomechanical analyzer includes: a) a vessel in which the sample is set; b) a spring standing in th...
05/11/1993
5178462Method and apparatus for measurement of dewpoint of gases
A method and an apparatus for measuring dewpoint of different kinds of gases, is based on cooling the measured gas, with the help of cold gas, down to the dewpoint and then detecting the generated mist by optical sensors. The cooling gas is routed to a me...
01/12/1993
5122633Method and apparatus for radiation microwave energy into material containing water or mixed with water
In order to obtain a more homogeneous energy absorption and preset maximum temperatures in an apparatus for radiating microwave energy into water-containing material or material mixed with water, which is introduced into a cavity resonator subjected to mi...
06/16/1992
5092679Melting point determination apparatus and method
A device and method for determining the melting point of a material having light reflective properties by determining changes in the reflective properties of the material while under pressure as it is being heated....
03/03/1992
5088833Method and apparatus for monitoring cloud point or like transition temperature
Apparatus for monitoring the cloud point of a liquid, or the temperature at which any light scattering phase occurs therein, comprising a light-proof and light-absorbing chamber, and a liquid sample-receiving receptacle within the chamber having a bottom ...
02/18/1992
5080494Method and apparatus for measurement of dewpoint of gases
A method and an apparatus for measuring dewpoint of different kinds of gases is based upon cooling the measured gas by mixing it with a cold gas down to the dewpoint and then detecting the generated mist by optical sensors. The cooling gas is routed to a ...
01/14/1992
5052818Method of and apparatus for measuring very low water content in gas
An improved method of and an apparatus for measuring a very low water content in a non-condensible gas which has a dew point in the range of from ordinary temperature to -80° C. or less. The gas to be measured is pre-cooled to a temperature slightly high...
10/01/1991
5022045Optical-type, phase transition humidity-responsive devices
The invention is directed to chemical compositions suitable for use in salt-solution transition temperature or hot mirror devices. It also provides methods of using these sensors (for the measurement of the humidity of gases) as well as the apparatus. The...
06/04/1991
4927270Method of and apparatus for determining melting points
The melting point of a powdery or particulate material is determined by allowing a sample of the material to contact a heated surface. If the material does not melt it is removed from the surface and the temperature of the surface is increased. The proces...
05/22/1990
4908835Information recording medium
A method of measuring reliability of an information recording medium which comprises an information recording thin film. The method comprises the steps of heating said film at least once to its melting point, rapidly cooling said film after heating, measu...
03/13/1990
4804274Method and apparatus for determining phase transition temperature using laser attenuation
Disclosed are methods and apparatus for determining phase transition temperatures and, more particularly, for determining cloud, fluidity, freezing, and haze points of hydrocarbon fuels and hydrocarbon/oxygenate fuel blends. The attenuation of laser light...
02/14/1989
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