Johnston, VA
Charles Leif Johnston, Fredericksburg, VA US
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20160003573 | Vehicle Mounted Slingshot Frame - A slingshot frame mounted to the trailer hitch receiver on a pick-up truck provides a slingshot that can be easily moved from place to place. The frame can be of a variety of configurations that allows a vertical component to be integrated to a horizontal section used in a standard 1.25 or 2 inch trailer hitch mount. | 01-07-2016 |
Chris Johnston, Chesterfield, VA US
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20100129196 | COOLED GAS TURBINE VANE ASSEMBLY - A gas turbine vane to improve vane performance by addressing known failure mechanisms. A cooling circuit to the trailing edge of a vane airfoil is fed from the outer diameter platform, which prevents failure due to an oxidized and eroded airfoil trailing edge. The gas turbine includes an outer diameter platform, a hollow airfoil and an inner diameter platform with a plurality of cooling tubes extending radially through the airfoil. The cooling tubes are open at the outer diameter end and closed with covers at the inner diameter end. The inner diameter platform is also cooled and includes a meterplate for a portion of the cooling passageway and includes an undercut to improve thermal deflections of the inner diameter platform. | 05-27-2010 |
David Johnston, Poquoson, VA US
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20080202331 | ELECTROSTATIC PRECIPITATOR HAVING A SPARK CURRENT LIMITING RESISTORS AND METHOD FOR LIMITING SPARKING - An electrostatic precipitator including: a collecting electrode in a gas passage; a discharge electrode in the gas passage and separated by a gap from the collecting electrode; a power supply applying a voltage to the discharge electrode, wherein the voltage establishes an electric field between the discharge electrode and the collecting electrode to ionize gas flow in the gap, and a resistor in series with the discharge electrode and having an effective resistance in series with the discharge electrode of at least 50 Ohms. | 08-28-2008 |
20080307974 | METHOD AND SYSTEMS TO FACILITATE IMPROVING ELECTROSTATIC PRECIPITATOR PERFORMANCE - A method to facilitate improving electrostatic precipitator performance is provided. The method includes providing an electrostatic precipitator including an inlet, a collector chamber and an outlet, where the collector chamber includes a plurality of discharge electrodes and a plurality of collector electrodes. The method also includes defining a respective discharge electrode V-I performance for each of the plurality of discharge electrodes, identifying a particle removal characteristic for each respective discharge electrode based on the respective discharge electrode V-I performance for each of the plurality of discharge electrodes and positioning each of the plurality of discharge electrodes in the electrostatic precipitator according to the particle removal characteristic for each respective discharge electrode. | 12-18-2008 |
20110005388 | Electrostatic Precipitator Having a Spark Current Limiting Resistors and Method for Limiting Sparking - An electrostatic precipitator including: a collecting electrode in a gas passage; a discharge electrode in the gas passage and separated by a gap from the collecting electrode; a power supply applying a voltage to the discharge electrode, wherein the voltage establishes an electric field between the discharge electrode and the collecting electrode to ionize gas flow in the gap, and a resistor in series with the discharge electrode and having an effective resistance in series with the discharge electrode of at least 50 Ohms. | 01-13-2011 |
David F. Johnston, Poquoson, VA US
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20100057269 | SYSTEMS AND METHODS FOR MONITORING A RAPPING PROCESS - A method for monitoring operation of a rapper in an electrostatic precipitator using a rapper control system is described. The method includes determining model electrical characteristics of the rapper. The model electrical characteristics of the rapper correspond to model mechanical operating characteristics of the rapper. The method also includes storing data corresponding to the model electrical characteristics and the model mechanical operating characteristics of the rapper, determining actual electrical characteristics of the rapper, and comparing the actual electrical characteristics of the rapper to the stored model electrical characteristics to determine actual mechanical operating characteristics of the rapper. | 03-04-2010 |
20110296989 | CONTROL OF GROUNDED SURFACE GEOMETRY IN ELECTROSTATICALLY ENHANCED FABRIC FILTERS - An electrostatic filter assembly configured to be installed in equipment for removing particulate matter entrained within a gas stream. The filter assembly functions in the removal and collection of the particulate matter from the gas stream. The equipment for removing particulate matter includes a high voltage discharge electrode for imparting an electric charge to the particulate matter whereby an electrical field is produced at the filter assembly. The filter assembly includes a filter element and a supporting structure for the filter element. The supporting structure is configured to establish at the filter assembly, under the operating conditions of the equipment for removing particulate matter, an electrical field having an intensity that produces no more than a selected amount of degradation at the filter element during operation of the equipment for removing particulate matter. Also a method of manufacturing such an electrostatic filter assembly. | 12-08-2011 |
David Fulton Johnston, Poquoson, VA US
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20090139406 | DISCHARGE ELECTRODE AND METHOD FOR ENHANCEMENT OF AN ELECTROSTATIC PRECIPITATOR - A method for designing a discharge electrode of an electrostatic precipitator, includes: | 06-04-2009 |
20110043999 | APPARATUS AND ARRANGEMENT FOR HOUSING VOLTAGE CONDITIONING AND FILTERING CIRCUITRY COMPONENTS FOR AN ELECTROSTATIC PRECIPITATOR - A unitary-enclosure housing apparatus and arrangement for protecting and cooling the high voltage electronic conditioning and filtering circuitry components used for providing a high-voltage waveform to an electrostatic precipitator device includes a hermetically sealed dielectric liquid coolant filled tank/housing having one or more side-mounted hollow-panel type radiator structures for dissipating heat from the coolant. The disclosed unitary-enclosure housing apparatus and the particular arrangement of the internal electronic components results in a relatively external small footprint while containing both the transformer-rectifier (TR) set and high-voltage resistor-capacitor (R-C) filter components associated with a high-voltage electrostatic precipitator device in a single unitary package. The housing apparatus is outfitted with a removable top cover plate and access panel for providing easy access to the TR set and R-C filter components. A coolant drain spigot is also provided on the housing for simplifying the draining and replacement of coolant liquid. | 02-24-2011 |
20110186022 | SYSTEM AND METHOD FOR CONTROLLING COMBUSTION - A system, in one embodiment, includes a combustion-based system having a combustion chamber. The system also includes an ignition control system. The ignition control system includes an ignition device coupled to the combustion chamber, control circuitry having an energy storage device configured to supply energy to the ignition device to produce an ignition event having a desired energy level, and a controller configured to obtain a target voltage across the energy storage device and to discharge an ignition energy from the energy storage device after obtaining the target voltage, wherein the ignition control system is configured to supply the ignition energy to the ignition device to produce the ignition event. | 08-04-2011 |
Gene Johnston, Radford, VA US
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20080245252 | NON-TOXIC PERCUSSION PRIMERS AND METHODS OF PREPARING THE SAME - A percussion primer composition including at least one explosive, at least fuel particle having a particle size of about 1500 nm or less, at least one oxidizer, optionally at least one sensitizer, optionally at least one buffer, and to methods of preparing the same. | 10-09-2008 |
20120227874 | NON-TOXIC PERCUSSION PRIMERS AND METHODS OF PREPARING THE SAME - A percussion primer composition including at least one explosive, at least fuel particle having a particle size of about 1500 nm or less, at least one oxidizer, optionally at least one sensitizer, optionally at least one buffer, and to methods of preparing the same. | 09-13-2012 |
20130118658 | NON-TOXIC PERCUSSION PRIMERS AND METHODS OF PREPARING THE SAME - A percussion primer composition including at least one explosive, at least one nano-coated fuel particle having natural surface oxides thereon, at least one oxidizer, optionally at least one sensitizer, optionally at least one buffer, and to methods of preparing the same. | 05-16-2013 |
Harold E. Johnston, Radford, VA US
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20130126057 | PERCUSSION PRIMER COMPOSITION AND SYSTEMS INCORPORATING SAME - A percussion primer composition that comprises an explosive and a sensitizer, the explosive being a moderately insensitive explosive having an impact sensitivity in the range from about 0.3 kp m to about 0.75 kp m. The moderately insensitive explosive may comprise CL-20, PETN, RDX, HMX, or mixtures thereof. The sensitizer may comprise aluminum, titanium, zirconium, magnesium, melamine, styrene, lithium aluminum hydride, or mixtures thereof. In some instances, the percussion primer composition may comprise the moderately insensitive explosive precipitated onto the sensitizer. The percussion primer composition may contain an oxidizer, which in certain situations comprises a conventional oxidizer or a bismuth compound. The bismuth compound is bismuth trioxide, bismuth subnitrate, bismuth tetroxide, bismuth sulfide, or mixtures thereof. A gun cartridge and other primer-containing ordnance assemblies employing the percussion primer composition are also disclosed. Methods of forming the sensitized explosive and the percussion primer are also disclosed. | 05-23-2013 |
Jeffrey W. Johnston, Charlottesville, VA US
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20080281583 | CONTEXT-DEPENDENT PREDICTION AND LEARNING WITH A UNIVERSAL RE-ENTRANT PREDICTIVE TEXT INPUT SOFTWARE COMPONENT - A system and method for supporting predictive text entry in software applications by sharing a common, predictive, software text-entry widget within a consumer device across multiple software applications and input contexts. The method comprises: a software application invoking an instance of a text-entry widget in a particular input context, the application optionally providing the widget a description of allowed symbols and a dictionary of expected symbol strings associated with the current context, the widget modifying a virtual keyboard display and predictive algorithm data according to the allowed symbols and dictionary, the user entering text via the widget, the widget returning the entered text to the application, and the application optionally including information derived from entered text in the associated dictionary to enhance the predictive capability of the widget on future invocations. | 11-13-2008 |
20080281974 | PROVIDING PERSONALIZED RESOURCES ON-DEMAND OVER A BROADBAND NETWORK TO CONSUMER DEVICE APPLICATIONS - A method and system for providing personalized information to applications executing on consumer devices by: building a consumer preferences profile on a consumer device using predefined associations between consumer preference attributes and application events (including user input); summarizing the consumer preferences profile into a profile summary when applications require a new personalized data resource; requesting a personalized data resource from a centralized database of data resources over the broadband network by including application context information along with the profile summary in the request; analyzing data resource groups in the centralized database to find a candidate set of data resources according to resource rules in the resource groups; selecting a personalized data resource from the candidate set of data resources that matches the profile summary and context information; and delivering the selected personalized data resource to the requesting application over the broadband network. Personalized data resources may include resource selection information, graphic images, text content, formatting information, video clip data, click-to-call data, and scripts and procedures. | 11-13-2008 |
20100306812 | SYSTEM FOR AND METHOD OF TARGETING BROADCAST MESSAGES - A system for and method of targeting a broadcast message to a subset of potential electronic receivers in a broadcast network is presented. The system and method may comprise collecting identifying information associated with designated electronic receivers of a targeted broadcast message, generating, using a computer processor, a data set structure using the identifying information, associating the data set structure with the targeted broadcast message, and broadcasting the targeted broadcast message and the data set structure to a plurality of electronic receivers, wherein the data set structure provides information allowing at least one of the plurality of electronic receivers to determine whether the targeted broadcast message is targeted to the at least one electronic receiver. | 12-02-2010 |
20110067003 | SYSTEM AND METHOD OF SUBSTITUTING PARAMETER SETS IN SELF-CONTAINED MINI-APPLICATIONS - Disclosed are systems and methods of building a default set of parameters into a software application by defining a widget template having associated parameter schema and then instantiating a widget by substituting a new set of application parameters for the built-in defaults such that the new parameters meet the same constraints defined for the default parameters. Aspects of the invention also include testing the original application containing the default parameters, along with the parameter substitution process itself, using a Statistical Software Testing Methodology (SSTM) to ensure the application meets a pre-determined level of quality. | 03-17-2011 |
20120096503 | SYSTEMS AND METHODS FOR PROVIDING COMPANION SERVICES TO CUSTOMER EQUIPMENT USING AN IP-BASED INFRASTRUCTURE - Disclosed herein are systems and methods for providing companion services to customer premises equipment (CPE) using an IP-based service infrastructure. The infrastructure allows IP-enabled devices such as tablet PCs, smart phones, PDAs, and laptop computers to provide supplementary services to target systems and devices located at customer premises. Target systems and devices (CPE) may be TVs, PCs, set-top boxes, digital video recorders, or other electronics. An embodiment is disclosed which allows a mobile device to provide companion services to a television through a link with a set-top box in a cable TV network using the Internet. | 04-19-2012 |
20120323725 | SYSTEMS AND METHODS FOR SUPPLEMENTING CONTENT-BASED ATTRIBUTES WITH COLLABORATIVE RATING ATTRIBUTES FOR RECOMMENDING OR FILTERING ITEMS - Disclosed herein are systems and methods for supplementing content-based attributes with collaborative rating attributes for recommending or filtering items. Collaborative rating data may be consolidated into “composite critics” which serve as item quality rating attributes. These attributes may be used in conjunction with content-based attributes to generate user preference models. Composite critics may be formed using data clustering methods such that users with similar tastes may be grouped together. The user preference models may be induced using machine learning processes, such as decision trees, artificial neural networks, support vector machines, and/or statistical techniques. In some embodiments, composite critics may represent a small number of users or professional critics selected for having differing sensibilities and who rate most or all items according to those sensibilities. | 12-20-2012 |
20130208190 | SYSTEMS AND METHODS FOR USER EVENT DATA REDUCTION - Disclosed herein are systems and methods for reducing the amount of data associated with user events. The systems and methods are particularly applicable to cable TV, satellite TV, and other networks where user event data (e.g., clickstream) must be sent from customer premises equipment (CPE) to centralized servers and the data transmission channel is narrow. In various exemplary embodiments, CPE such as television set-top boxes may reduce requirements for data storage and network bandwidth by replacing portions of channel-number/timestamp streams with abbreviated codes representing common meta-events such as “channel surfing events” and “previous channel events.” The original channel-number/timestamp streams can be reconstituted on centralized servers. Other common sequences of events, including those involving activation of other buttons on remote controls (i.e., buttons not related to changing channels), keyboard keys, mouse pointing device controls, and the like may constitute meta-events and be similarly replaced by abbreviated codes. | 08-15-2013 |
J. Mark Johnston, Mclean, VA US
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20110078276 | Method of Scalable Web Financing By Micropayments - A method is disclosed of scalable web financing by micropayments that 1) equitably and automatically allocates costs among web site users that may have varying usage patterns; 2) lowers the risk in providing niche websites to smaller groups of users; 3) provides a funding source directly related to web site usage by particular users; 4) allows the web site to scale with demand; and 5) provides incentives for provision of content to a web site that is timely and useful. A microcost is determined for each element of web site content. A micropayment is transferred from a user's web site account to a web site operator account in an amount equivalent to the determined microcost when the user accesses the web site content. Various methods of calculating the microcost are disclosed, as well as methods of compensating content-providers with micropayments or credits, as a means to provide incentives for provision of content. | 03-31-2011 |
John C. Johnston, Richmond, VA US
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20130183510 | DIFFUSE REFLECTOR - The present invention relates to a diffuse reflector comprising a nonwoven sheet of fibers wherein in the nonwoven sheet has a reflectance and a delamination selected from the group consisting of a reflectance of at least about 97.0% and a delamination of at least about 0.18 N/cm, a reflectance of at least about 96.0% and a delamination of at least about 0.49 N/cm, and a reflectance of at least about 95.0% and a delamination of at least about 0.70 N/cm. | 07-18-2013 |
Neil Stephen Denis Johnston, Roundhill, VA US
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20140130186 | METHODS AND SYSTEMS FOR INCREASING THE SECURITY OF ELECTRONIC MESSAGES - A method for accessing e-mail messages from a control system includes requesting access to e-mail message contents of a user stored in the control system, determining whether the user is enrolled in and activated by the control system, and authenticating the user when the user is enrolled in and activated by the control system. Moreover, the method includes permitting the user to view a list of e-mail messages when the user is successfully authenticated. The e-mail messages included in the list are associated with the user. Furthermore, the method includes permitting the user to access the contents of e-mail messages in the list having a security level equal to or less than a security level associated with the successful authentication. | 05-08-2014 |
Neil Stephen Denis Johnston, Leesburg, VA US
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20130074195 | METHODS AND SYSTEMS FOR INCREASING THE SECURITY OF ELECTRONIC MESSAGES - A method for accessing e-mail messages from a control system includes requesting access to e-mail message contents of a user stored in the control system, determining whether the user is enrolled in and activated by the control system, and authenticating the user when the user is enrolled in and activated by the control system. Moreover, the method includes permitting the user to view a list of e-mail messages when the user is successfully authenticated. The e-mail messages included in the list are associated with the user. Furthermore, the method includes permitting the user to access the contents of e-mail messages in the list having a security level equal to or less than a security level associated with the successful authentication. | 03-21-2013 |
Patrick H. Johnston, Newport News, VA US
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20130030727 | Floating Ultrasonic Transducer Inspection System and Method for Nondestructive Evaluation - A method for inspecting a structural sample using ultrasonic energy includes positioning an ultrasonic transducer adjacent to a surface of the sample, and then transmitting ultrasonic energy into the sample. Force pulses are applied to the transducer concurrently with transmission of the ultrasonic energy. A host machine processes ultrasonic return pulses from an ultrasonic pulser/receiver to quantify attenuation of the ultrasonic energy within the sample. The host machine detects a defect in the sample using the quantified level of attenuation. The method may include positioning a dry couplant between an ultrasonic transducer and the surface. A system includes an actuator, an ultrasonic transducer, a dry couplant between the transducer the sample, a scanning device that moves the actuator and transducer, and a measurement system having a pulsed actuator power supply, an ultrasonic pulser/receiver, and a host machine that executes the above method. | 01-31-2013 |
Peter Michael Johnston, Chesapeake, VA US
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20120146764 | FINGER LOCK - The present invention presents a novel security access device, wherein finger movements define a validation code to unlock entryway access in a system comprising an electronic controller directing a servomechanism. Security is enhanced by the finger movements, which are rendered virtually undetectable to an observer, and by the mathematical augmentation of the number of choices for code selection. Alternative embodiments present both a novel system and a novel method for validating access. | 06-14-2012 |
Scott Johnston, Potomac Falls, VA US
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20080208651 | LEAD DISBURSEMENT SYSTEM AND METHOD - A method includes associating a lead with a subset of participants from a plurality of participants. The associating is performed based on a criteria list. A priority is determined for each participant from the subset of participants. A capacity coefficient is determined for each participant from the subset of participants. The lead is exclusively assigned to a participant from the subset of participants based on the priority for the participant and the capacity coefficient for the participant. | 08-28-2008 |
Thomas Andrew Johnston, Richmond, VA US
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20120217428 | VALVE ASSEMBLY - A valve assembly includes a valve seat having a valve opening therein. A valve plate is configured to sealingly engage the valve seat in a closed position for closing the valve opening to thereby close a fluid path through the valve assembly, the valve plate being biased toward the closed position by a first spring. An actuator plate can include an inlet opening therein, the actuator plate being biased in a direction away from the valve plate by a second spring. A member includes a first end fixed to the actuator plate, an interior passage in communication with the inlet opening in the actuator plate, and a second end engageable with the valve plate when a portion of the member passes through the valve opening of the valve seat, wherein the valve plate is configured to open in response to direct fluid pressure when fluid is guided to the valve plate by the member or when fluid pressure on the actuator plate is transmitted to the valve plate via the member. | 08-30-2012 |
William Johnston, Blacksburg, VA US
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20150144333 | MONITORING FLUID FLOW IN A DOWNHOLE ASSEMBLY - A method of monitoring fluid flow in a borehole includes measuring acoustics at a plurality of locations along a downhole assembly in a borehole and calculating a fluid flow rate at the plurality of locations along the downhole assembly based on measuring the acoustics at the plurality of locations. | 05-28-2015 |
20150146759 | TEMPERATURE SENSING USING DISTRIBUTED ACOUSTIC SENSING - An embodiment of a method of measuring temperatures includes: taking distributed acoustic sensing (DAS) measurement data by transmitting interrogation signals into an optical fiber disposed in an environment of interest, and receiving reflected signals over a selected time period from the optical fiber; processing the DAS measurement data to separate components of the DAS data associated with changes in temperature; and generating a temperature change profile for the selected time period based on the separated components of the DAS data. | 05-28-2015 |
20150233236 | OPTICAL FIBER DISTRIBUTED SENSORS WITH IMPROVED DYNAMIC RANGE - An apparatus for sensing acoustic waves below a surface of the earth includes an optical fiber disposed below the surface of the earth and having a series of sensing units along the optical fiber with each sensing unit having three or more reflectors and an optical interrogator in optical communication with the optical fiber. The reflectors in each sensing unit are positioned to provide a linearized response that approximates a sawtooth wave better than a sinusoidal wave to sense the acoustic waves in a desired dynamic range. The optical interrogator is configured to transmit an input light signal into the optical fiber and receive a reflected light signal from the optical fiber due to the input light signal in order to measure a strain on each sensing unit due to interaction with the acoustic waves and to determine a location of the sensing unit corresponding to the sensed strain. | 08-20-2015 |
20150292956 | DISTRIBUTED TEMPERATURE SENSOR ENHANCEMENT BY STIMULATED RAMAN SUPPRESSION - A distributed temperature sensor and a method of determining temperature are described. The distributed temperature sensor includes an optical fiber to filter or remove Stokes Raman scatter and prevent stimulated Raman scatter and a light source to inject light into the optical fiber. The distributed temperature sensor also includes a photodetector to detect light energy resulting from the light injected into the optical fiber, the light energy including anti-Stokes Raman scatter and Rayleigh scatter; and a processor to determine temperature based on a ratio of the anti-Stokes Raman scatter and the Rayleigh scatter. | 10-15-2015 |
20150300891 | ATTENUATION CORRECTION FOR DISTRIBUTED TEMPERATURE SENSORS USING ANTISTOKES TO RAYLEIGH RATIO - A distributed temperature sensor, a method of determining temperature, and a processing system to compute temperature are described. The sensor includes an optical fiber disposed in an area where temperature is to be measured, a primary light source to inject light into the optical fiber, and a secondary light source to inject light into the optical fiber. The sensor additionally includes a photodetector to detect backscatter light energy from the optical fiber the backscatter light energy including Stokes Raman scatter or anti-Stokes Raman scatter and primary Rayleigh scatter resulting from the primary light source and secondary Rayleigh scatter resulting from the secondary light source, and a processor to determine temperature based on a ratio of the Stokes Raman scatter or the anti-Stokes Raman scatter and a combination of the primary Rayleigh scatter and the secondary Rayleigh scatter. | 10-22-2015 |
20150318920 | DISTRIBUTED ACOUSTIC SENSING USING LOW PULSE REPETITION RATES - A distributed acoustic sensing system and a method of obtaining acoustic levels using the distributed acoustic sensing system are described. The distributed acoustic sensing system includes an optical fiber, a light source to inject light into the optical fiber, and a photodetector to sample a DAS signal in each section of one or more sections of the optical fiber resulting from two or more points within the section on the optical fiber over a period of time. The system also includes a processor to process only a low frequency portion of the DAS signal to obtain the acoustic levels at each of the one or more sections on the optical fiber over the period of time, the low frequency portion of the DAS signal being less than 10 Hz. | 11-05-2015 |
William M. Johnston, Newport News, VA US
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20140319355 | Optical Method for Detecting Displacements and Strains at Ultra-High Temperatures During Thermo-Mechanical Testing - An ultra-high temperature optical method incorporates speckle optics for sensing displacement and strain measurements well above conventional measurement techniques. High temperature pattern materials are used which can endure experimental high temperature environments while simultaneously having a minimum optical aberration. A purge medium is used to reduce or eliminate optical distortions and to reduce, and/or eliminate oxidation of the target specimen. | 10-30-2014 |