| Patent Number |
Title Of Patent |
Date Issued |
| 5319970 |
Continuously curved strut mounted sensor |
June 14, 1994 |
| An air data sensor (10) for mounting on an air vehicle (14), the outer end (11) is spaced outwardly from a surface of the air vehicle (14), a mounting base (12) and an outer end (11) which is provided with sensing ports (21, 22) for sensing air data parameters, the body (32) of the s |
| 5302026 |
Temperature probe with fast response time |
April 12, 1994 |
| A temperature probe measures the temperature of a fluid which moves relative to the probe. The probe includes a housing, a transducer, and one or more fins. The housing has a bore with a bore axis and carries at least a portion of the fluid along the bore axis. The transducer has a sensi |
| 5287746 |
Modular transmitter with flame arresting header |
February 22, 1994 |
| A transmitter with a flame arresting header senses a pressure of a process fluid with a diaphragm which is sealed to the header. The diaphragm transfers the pressure of the process fluid acting an outer surface of the diaphragm to a fill fluid that isolates an inner surface of the diaphr |
| 5283716 |
Electrical component support structure |
February 1, 1994 |
| A component support assembly releasably retains, electrically insulates and improves thermal transfer of a plurality of vertically stacked electrical components associated with the operation of a printed circuit card. Each of a plurality of integrally-molded component support structures |
| 5281922 |
Method for capacitance temperature compensation and manufacturability in a dual plate capacitive |
January 25, 1994 |
| A two wire transmitter responsive to a pressure differential sensor includes a fixed module and a removable module. The fixed module is adapted for connection to an analog removable module having a compensation capacitance M.sub.A C.sub.DA or a digital removable module having compens |
| 5278543 |
Transmitter with magnetic zero/span actuator |
January 11, 1994 |
| A transmitter for use in a process control system has externally accessible actuators for permitting external adjustment of the zero and span (or full scale) settings of the transmitter. The transmitter has an explosion-proof housing which includes an interior chamber in which transmitte |
| 5269188 |
Continuous self test time gate ultrasonic sensor and method |
December 14, 1993 |
| A time gate ultrasonic sensor measures a physical property of a material, such as the presence of the material, within a defined space. The sensor includes at least one transducer connected to a support structure and positioned generally adjacent the defined space for transmitting and |
| 5258868 |
Optical process variable transmitter |
November 2, 1993 |
| A light input energizes an optical transmitter providing a light output to a waveguide indicating a process variable. The transmitter has a process variable sensor generating a sensor output. An electrical circuit receives the sensor output and generates an electrical transmitter output |
| 5255980 |
Black body TRD temperature sensor |
October 26, 1993 |
| A temperature sensing system has a signal means which provides a signal representative of a temperature responsive luminescence, where the luminescence has a characteristic time-rate-of-decay. A means for comparison is connected to the signal means and samples the signal during two t |
| 5253511 |
Transmitter with multifunction adjustment |
October 19, 1993 |
| A process variable transmitter which has a manual adjustment for span and zero or the like. The adjustment has a finer adjustment range where the output changes responsive to changes in the position of the adjustment. The adjustment has a coarse range where the transmitter output changes |
| 5248167 |
Interchangeable process connection resistant to installation errors |
September 28, 1993 |
| An assembly for aligning and supporting an adapter flange for connecting fluid pressures to a pressure sensor body in place on the body and to keep the flange in an unsealed condition to prevent pressurizing the body and flange until installation of permanent fasteners. The support faste |
| 5247837 |
Magnetic flowmeter electrode |
September 28, 1993 |
| The flow tube of a ceramic material used for a magnetic flowmeter is formed with electrodes that are positioned in the wall of the tube and form a fluid tight fitting. The electrodes have a center plug made of a ceramic material with a metallization layer between the plug and the surface |
| 5245616 |
Technique for acknowledging packets |
September 14, 1993 |
| A plurality of message packets are individually acknowledged in a communications network. The acknowledgement includes multiple types of status information including ACK, NAK and BUSY. Each message packet is assigned a sequence number. Acknowledgements are sent in response to receivi |
| 5245333 |
Three wire low power transmitter |
September 14, 1993 |
| A three wire transmitter bidirectionally communicates AC signals to and from a first external device and sends DC signals to a second external device. The transmitter includes a communication circuit which is energized from power and common terminals and includes memory storage for t |
| 5237285 |
Method and apparatus for capacitance temperature compensation and manufacturability in a dual pl |
August 17, 1993 |
| A two wire transmitter responsive to a pressure differential sensor includes a fixed module and a removable module. The fixed module is adapted for connection to an analog removable module having a compensation capacitance M.sub.A C.sub.DA or a digital removable module having compens |
| 5236202 |
Spring loaded resin seal |
August 17, 1993 |
| A spring loaded seal is placed between three continuous groove walls between mating parts adjacent to a pressure transmitter isolator. The seal includes a resin ring with two ring walls conformable to two of the groove walls. A third ring wall has a continuous slot extending into the rin |
| 5230248 |
Corrosion resistant isolator |
July 27, 1993 |
| An isolator for use in pressure transmitters for isolating the process fluid being sensed from a sensor, comprises an isolating diaphragm that is thin, and made of a suitable corrosion resistant metal, such as tantalum, and which must be anchored to an isolator housing made of a substant |
| 5227782 |
Hydrostatic interface unit |
July 13, 1993 |
| An interface unit is provided for transmitting signals to and receiving signals from several transmitters. The interface unit includes a DC power supply, an active load, and a transmit/receive circuit connected to the first wire of a two wire circuit which transmits signals to and receiv |
| 5221456 |
Insulated core electrode for pH sensor |
June 22, 1993 |
| A pH sensor has a core of an electrochemically inert insulating or semi-conductive material, and is coated with an electrically conductive, electrochemically sensitive coating. The preferred core is insulating and made of alumina, with a thin coating of iridium oxide deposited over at |
| 5211480 |
TRD temperature sensor and electronics |
May 18, 1993 |
| A temperature sensing system has a signal means which provides a signal representative of a temperature responsive luminescence, where the luminescence has a characteristic time-rate-of-decay. A means for comparison is connected to the signal means and samples the signal during two t |
| 5205169 |
Angle of attack sensor using inverted ratio of pressure differentials |
April 27, 1993 |
| An angle of attack sensor is provided with ports for sensing flow angles in desired planes based upon differential pressure at the ports when a longitudinal or reference axis of the sensor changes relative to the flow stream. Impact pressure is also measured with the same probe, or with |
| 5187474 |
Digital converter apparatus for improving the output of a two-wire transmitter |
February 16, 1993 |
| An existing analog two-wire transmitter has a sensor module, an analog excitation circuit, and an analog detector circuit which provides an output representative of a sensed process variable, such as pressure, to a two-wire current loop. The analog detection circuit is removed and re |
| 5179488 |
Process control instrument with loop overcurrent circuit |
January 12, 1993 |
| A process control instrument receives a DC current from a two wire loop and has overcurrent protection and reverse current protection circuits which pass a portion of the DC current as a device current to a process controlling device. The overcurrent protection circuit includes a current |
| 5166678 |
Dual master implied token communication system |
November 24, 1992 |
| A pair of master units share a common communication link to communicate with one or more slave units. Each slave unit transmits a message only in response to a message from one of the master units. When an initial transmission request is received by a master unit, it monitors the com |
| 5163326 |
Line pressure compensator for a pressure transducer |
November 17, 1992 |
| In a two wire transmitter, a capacitive sensor senses differential pressure and provides a differential pressure signal based on the differential pressure sensed. The differential pressure signal varies with variations in static pressure. A capacitive compensator has a capacitive value |
| 5157972 |
Pressure sensor with high modules support |
October 27, 1992 |
| A metal thin film bonds a semiconductor bonding region of a diaphragm layer to a ceramic bonding region of a high modulus support block. The arrangement isolates a pressure sensing diaphragm from undesired strain, improving sensor accuracy. A passageway through the support block couples |
| 5152882 |
Integral hydrolysis layer junction |
October 6, 1992 |
| The present invention includes an ion diffusion junction in an electrochemical cell. The junction includes a polymer matrix that is impermeable to the sample solution. A plurality of inclusions are disposed within the junction matrix and oriented to form continuous hydrolytic pathway |
| 5146244 |
Window purging system for a combustion instrument |
September 8, 1992 |
| A purging air flow system that causes air to pass over a pyrometer lens or window to keep it clean and free from particulate contaminants has an annular, continuous slot for air inlet around the periphery of the lens to permit flow of air across the lens without any obstructions in the p |
| 5140609 |
TRD temperature sensor |
August 18, 1992 |
| A temperature sensing system has a signal means which provides a signal representative of a temperature responsive luminescence, where the luminescence has a characteristic time-rate-of-decay. A means for comparison is connected to the signal means and samples the signal during two t |
| 5140135 |
Adaptive ice detector circuit |
August 18, 1992 |
| An ice detector circuit controls heating of a probe detecting ice. The circuit generates an icing output as a function of a temperature output generated by the probe. A control circuit cyclically controls a start time of the heating. A time measurement circuit measures a warm-up time to |
| 5130707 |
Preassembled air data sensor and transducer |
July 14, 1992 |
| A preassembled air data sensor probe and air data transducer assembly has permanently connected flexible tubing coupling the air data transducer fittings and the sensor fittings. The flexible tubing permits the air data sensor and air data transducer to be installed into an air vehicle a |
| 5122794 |
Dual master implied token communication system |
June 16, 1992 |
| A pair of master units share a common communication link to communicate with one or more slave units. Each slave unit transmits a message only in response to a message from one of the master units. When an initial transmission request is received by a master unit, it monitors the com |
| 5119033 |
Vernier voltage-to-digital converter with a storage capacitance selectable in magnitude |
June 2, 1992 |
| A voltage-to-digital converter comprising a storage circuit for providing a storage capacitance with a plurality of selectable magnitudes. The storage circuit provides a charge output representative of applied voltage input signals and the selected capacitive magnitude. A charge accumula |
| 5095755 |
Isolator for pressure transmitter |
March 17, 1992 |
| In a pressure transmitter, a central region of an isolator diaphragm with a substantially flat shape at an undeflected position near room temperature has a depressed shape at a deflected position at a colder temperature. The isolator diaphragm is over a shaped concavity in a transmitter |
| 5095739 |
Tank leak detector |
March 17, 1992 |
| A tank leak detector has a pressure transmitter suspended in a tank to detect liquid level changes of a fluid by sensing a pressure which changes when a liquid level changes. The transmitter preferably is a differential pressure transmitter. A pump is provided for drawing liquid through |
| 5094109 |
Pressure transmitter with stress isolation depression |
March 10, 1992 |
| A pressure transmitter has a pressure transducer in a transmitter housing. The transmitter housing includes a groove or a notch defining a flexure closely proximate a housing outer rim. The outer rim receives a large clamping force from a flange and is deflectable about the flexure for |
| 5089293 |
Method for forming a platinum resistance thermometer |
February 18, 1992 |
| A platinum resistance thermometer is formed in a process which includes the defining of a path for the resistance thermometer in an inert material deposited in a layer on the substrate. The substrate surface is exposed in the path, and the inert material forms a negative pattern for the |
| 5083091 |
Charged balanced feedback measurement circuit |
January 21, 1992 |
| A measurement circuit provides an output signal as a function of an input signal. The measurement circuit includes a charge generator which provides packets of charge as a function of the input signal to a measurement element. The measurement element measures the charge provided and prov |
| 5079957 |
Conversion circuit for an electromagnetic flow transmitter |
January 14, 1992 |
| A magnetic flowmeter generates an alternating potential representing flow. A controlled current excites the flowmeter with first and second amplitudes of current. A correction output represents the first and second amplitudes. A circuit connected to the correction output and the alte |
| 5077525 |
Electrodeless conductivity sensor with inflatable surface |
December 31, 1991 |
| An inductive conductivity sensor is immersed in a liquid to measure its conductivity. The sensor comprises a transducer for generating a changing magnetic field and for inductively measuring an electric current induced in the liquid by the changing magnetic field. The transducer has an |
| 5071721 |
Matrix immobilized electrolyte |
December 10, 1991 |
| A solid electrolyte for use in a reference electrochemical half cell, the electrolyte comprising an insulative binder forming a matrix, a particulate salt dispersed within the binder and immobilized by the binder, and a hydrophilic polymer network disposed within the binder in an amo |
| 5062869 |
Water separator for air data sensor |
November 5, 1991 |
| A water separating device for a pressure measurement such as static, pitot measurement system provides a plurality of ports therethrough such that water, snow and ice from atmospheric air is substantially removed therefrom so that desired parameters such as temperature or pressure can |
| 5046360 |
Aerodynamic probe internal constructions |
September 10, 1991 |
| A short, strut mounted, multifunction air data sensing probe providing reduced drag, weight and radar cross-section has a modular internal construction providing a multiple passageway pressure assembly to transfer sensed pressure signals from individual sensing ports on a probe barrel to |
| 5028746 |
Cable protector for wound cable |
July 2, 1991 |
| A cable protector comprises a cylindrical reel sleeve having an opening in the side wall, and one open end. A cable that is loosely, helically wound around a central axis to form a coil is inserted into the sleeve with one connector of the cable extending out through the bottom, and the |
| 5022270 |
Extended measurement capability transmitter having shared overpressure protection means |
June 11, 1991 |
| A transmitter measures pressures and has a pressure sensor and an additional pressure sensor providing additional measurement capability to the transmitter, such as an extended measurement range or measurement redundancy. Both pressure sensors share an overpressure protection device |
| 5003295 |
Ice detector probe |
March 26, 1991 |
| An ice detector probe senses an ice deposition from an air mass flowing relative to the probe. The probe includes a support for installation of the probe to receive the airflow and an element formed on a substrate having a sensing surface which directly receives the airflow. The element |
| 4993754 |
Liquid level coplanar transmitter adapter |
February 19, 1991 |
| An adapter for coupling a pressure transmitter to a vessel or tank carrying a liquid therein that establishes a hydrostatic pressure at a flanged opening has a planar surface that includes two spaced apart pressure ports that are aligned with and will mate with the isolator input ports o |
| 4990236 |
Thin film moisture sensing element |
February 5, 1991 |
| A solid state, thin film moisture sensing element is disclosed. The sensing element is fabricated by thin film deposition of at least a pair of two layer electrodes on an insulating surface. The active surface of the element is then coated with a layer of hygroscopic material and placed |
| 4988990 |
Dual master implied token communication system |
January 29, 1991 |
| A pair of master units share a common communication link to communicate with one or more slave units. Each slave unit transmits a message only in response to a message from one of the master units. When an initial transmission request is received by a master unit, it monitors the com |
| 4980673 |
Ice detector circuit |
December 25, 1990 |
| An ice detector circuit for sensing an ice deposition on a sensing surface of an ice detector probe from an air mass flowing relative to the probe. The probe includes a heater to heat the sensing surface and a temperature sensor for sensing the sensing surface temperature during heating. |
