Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 8186226 | Pressure sensor with on-board compensation The present disclosure relates generally to pressure sensors, and more particularly, to methods and apparatus for compensating pressure sensors for stress, temperature and/or other induced offsets and/or errors. In one illustrative embodiment, a pressure sensor may ... | 05/29/2012 |
| 8109148 | Pressure compensation unit for use in a pressure sensor A pressure compensation unit for use in a pressure sensor includes a housing which has at least one continuous channel, at least one opening being provided in a wall of the channel. The opening is connectable to a reference pressure chamber of the pressure sensor vi... | 02/07/2012 |
| 8082796 | Temperature extraction from a pressure sensor Circuits, methods, and systems to compensate pressure sensor readings for changes in temperature. An example measures temperature in a field-effect-transistor-based pressure sensor or micro-electromechanical system by measuring the device's threshold voltage. This t... | 12/27/2011 |
| 8069729 | Pressure gauge A pressure measuring device for measuring and/or monitoring the pressure of a measured medium. The pressure measuring device includes a sensor housing and a measurement transmitter, wherein assigned to the sensor housing is a pressure measuring cell with a pressure ... | 12/06/2011 |
| 8065918 | Air pressure sensor with temperature compensation An air pressure sensor that has a first conductive membrane configured for deflection in response to pressure differences between air at a reference pressure and air at a pressure to be sensed. The sensor also has a second conductive membrane configured for deflecti... | 11/29/2011 |
| 8033175 | Temperature compensation of a multivariable pressure transmitter A multivariable process fluid pressure transmitter includes an electronics module and a sensor module. The sensor module is coupled to the electronics module. A process fluid temperature sensor is coupled to the process fluid pressure transmitter. A differential pre... | 10/11/2011 |
| 8006564 | Pressure sensor with integrated thermal stabilization and method of using The present invention relates to a method of determining both pressures and temperatures in a high temperature environment. The present invention also relates to a method of determining temperatures about a pressure-sensing element using a bi-functional heater. In a... | 08/30/2011 |
| 7878067 | Temperature compensating pressure sensor A temperature compensating pressure sensor arrangement includes a capacitive pressure sensor having a substrate carrying CMOS layers. A conductive membrane is arranged on the substrate and defines a reference chamber such that capacitance changes resulting from disp... | 02/01/2011 |
| 7841238 | Pressure sensor with temperature compensation The invention provides for a pressure sensor with compensation for temperature variations. The sensor has CMOS layers deposited on a substrate, a conductive layer connected to the CMOS and a passivation layer deposited on the CMOS layers. The arrangement also includ... | 11/30/2010 |
| 7832277 | Wireless fluid pressure sensor A battery powered wireless fluid pressure sensor has a sealed chamber which can be vented to the outside atmosphere through a re-sealable reference port to allow a user to set the reference atmosphere inside the pressure sensor enabling the pressure sensor to provid... | 11/16/2010 |
| 7784351 | Field device with integrated temperature control A field device with integrated temperature control comprises a housing, a temperature sensor, a controller and a terminal block. The housing encloses internal components of the field device. The temperature sensor and the controller are located inside the housing. T... | 08/31/2010 |
| 7784350 | Downhole transducer with adjacent heater An apparatus comprising a downhole measurement tool, a transducer coupled to the measurement tool, the transducer having a body with an outer surface, and a heater disposed adjacent the outer surface to conduct heat from the heater to the outer surface. ... | 08/31/2010 |
| 7775116 | Pressure transducer with eccentric sleeve for adjusting the position of a pressure port This invention relates to a pressure measuring instrument, as well as a dedicated liner, especially for subsea use and adapted for coupling to a pressurized medium in a container or pipe through at leas tone opening therein and thus measure the pressure in the mediu... | 08/17/2010 |
| 7698950 | Pressure sensor assembly for measuring absolute pressure An absolute pressure transducer for outputting a signal indicative of an absolute pressure of a process to be measured is provided. The pressure transducer consists of a pressure-tight pressure port, which is connectable to the process, a housing accommodating press... | 04/20/2010 |
| 7694572 | Pressure-measuring device A pressure-measuring device has an initial pressure-measuring cell (1′) with a first thermal expansion coefficient (α1), a first housing (1), which is surrounded circumferentially by a second housing (1) having a second thermal expansi... | 04/13/2010 |
| 7690262 | Pressure sensor device including temperature sensor contained in common housing A pressure sensor device includes a temperature sensor mounted on a common housing composed of a resin head and a resin pipe both hermetically connected to each other. The pressure sensor device is mounted on, for example, on an intake manifold of an internal combus... | 04/06/2010 |
| 7677105 | Double-ended tuning fork type piezoelectric resonator and pressure sensor To provide a double-ended tuning fork type piezoelectric resonator that includes: a piezoelectric element having two arm portions disposed in parallel, a first supporting portion that support one ends of each of the arm portions, a second supporting portion that sup... | 03/16/2010 |
| 7587944 | Pressure sensor with integrated cooler and methods of using The present invention relates to a method of determining both pressures and temperatures in a high temperature environment. The present invention also relates to a method of determining temperatures about a pressure-sensing element using a bi-functional heater. In a... | 09/15/2009 |
| 7581447 | Temperature compensating pressure sensing arrangement The invention provides for a temperature compensating pressure sensing arrangement. The arrangement includes a substrate having sealed channels on which is deposited a CMOS layer, with a conductive layer and a passivation layer deposited on the CMOS layer. The arran... | 09/01/2009 |
| 7574919 | Integrated sensor including a pressure sensor and a temperature sensor An integrated sensor includes a pressure sensor integrated with a temperature sensor. When the sensor is attached to an object of attachment at a mounting position at an angle of θrq degrees with respect to an ideal attachment position, in which a centra... | 08/18/2009 |
| 7552642 | Pressure vessel testing A method for determining the maximum allowable working pressure of a microchannel device, particularly a diffusion-bonded, shim-based microchannel device operating at a temperature greater to or equal to a base material threshold temperature where significant creep ... | 06/30/2009 |
| 7464599 | Temperature compensating pressure sensor having active and reference membranes Provided is a temperature compensating pressure sensor. The sensor includes a silicon substrate having sealed channels on which is deposited a CMOS layer, and a conductive layer and a passivation layer deposited on the CMOS layer, the conductive layer representing a... | 12/16/2008 |
| 7464598 | Method of pressure sensing with a pressure sensor having a sensor membrane and a compensation membrane The invention provides for a method of sensing pressure with a pressure sensor having a sensor membrane and a compensation membrane. The pressure sensor also includes a power supply, a controller; and a charge amplifier, a charge injector and two switches arranged i... | 12/16/2008 |
| 7434470 | Combined pressure and temperature sensor A combined pressure and temperature sensor for recording the pressure and the temperature of a medium. A sensor element of the combined pressure and temperature sensor includes a through-hole to a diaphragm and a bore for accommodating a temperature sensor. The diap... | 10/14/2008 |
| 7415884 | Pressure sensor with integrated bi-functional heater and methods of using The present invention relates to a method of determining both pressures and temperatures in a high temperature environment. The present invention also relates to a method of determining temperatures about a pressure-sensing element using a bi-functional heater. In a... | 08/26/2008 |
| 7412893 | Redundant mechanical and electronic remote seal system A redundant pressure transmitter for redundantly measuring pressure of a process fluid comprises a transmitter housing, transmitter circuitry, a remote seal assembly including a first pressure sensor, and a second pressure sensor positioned in the transmitter housin... | 08/19/2008 |
| 7392687 | Method of calibrating zero offset of a pressure sensor A piezoresistive pressure sensor test sample is first provided, and a zero offset of the piezoresistive pressure sensor test sample is measured. Subsequently, a stress deviation corresponding to the zero offset is calculated. Thereafter, at least a piezoresistive pr... | 07/01/2008 |
| 7389686 | Methods and systems for determining air data parameters An air data system is described that includes a cone-shaped probe, a plurality of pressure transducers, and a processing device. The cone-shaped probe includes a first pressure port formed in a substantial tip of the probe and extending therethrough, and a plurality... | 06/24/2008 |
| 7389695 | Wireless fluid pressure sensor A battery powered wireless fluid pressure sensor has a sealed chamber which can be vented to the outside atmosphere through a re-sealable reference port to allow a user to set the reference atmosphere inside the pressure sensor enabling the pressure sensor to provid... | 06/24/2008 |
| 7377171 | Feedback circuit for radiation resistant transducer A velocity transducer or Velomitor® that can output electrical signals relating to vibration, despite the transducer being exposed to low levels of gamma-radiation, is disclosed. A DC feedback circuit, which sets up the input stage bias point, keeps the output bias... | 05/27/2008 |
| 7373266 | Sensor calibration using selectively disconnected temperature Calibration of a sensor circuit that includes a sensor, a temperature measurement circuit and a signal processing path. The sensor senses a physical parameter to be measured and generates an electrical sensor output signal representing the physical parameter. The te... | 05/13/2008 |
| 7364353 | Dynamic correction of sensed temperature A thermostat (10) for sensing the ambient temperature in an environment includes an enclosure (100) housing a temperature sensor (20) for sensing the temperature within the enclosure, a temperature display device (30), a liquid crystal di... | 04/29/2008 |
| 7363819 | High-pressure sensor housing which is simplified by means of a connection element (also emc) A device for measuring pressure, in particular for measuring high pressure, is provided, having a pressure sensor situated in a sensor housing, the sensor housing having a first sensor housing part provided with a pressure connecting piece and a second sensor housin... | 04/29/2008 |
| 7360438 | Advanced thick film load cell A load cell apparatus and method for forming the same. A load cell apparatus is configured to include a load cell housing and a modular strain gage element that is modularly assembled into the load cell housing. The load cell housing and the modular strain gage elem... | 04/22/2008 |
| 7360428 | Capacitive pressure measuring cell with a membrane bed The invention relates to a pressure measuring cell comprising a base body, a membrane that is connected to the base body, thus forming a measuring chamber. During operation, the membrane is subjected to a deflection which is dependent on a pressure that is to be mea... | 04/22/2008 |
| 7357032 | Pressure transmitter The invention relates to a pressure transmitter for an overload-proof pressure gauge, comprising a base body, a separating membrane disposed on a pressure-sensitive side of the pressure transmitter and subjectable to a pressure to be measured, a communicating chambe... | 04/15/2008 |
| 7347099 | Pressure transducer with external heater An improved pressure transducer is disclosed. The transducer includes a connector, an enclosure, a sensor portion, and an external heater disposed to heat the sensor portion. In some aspects, the sensor portion includes a sensor constructed from a brittle material a... | 03/25/2008 |
| 7342185 | Compression column load cell with compensation for off center loading errors Simple and inexpensive electrical compensation for off-axis and off-center loading sensitivity is possible in compression column load cells having a pair of compensation strain gages in series with each of the main strain gages in the load cell. The compensation gag... | 03/11/2008 |
| 7334483 | Thermal compensation of pressure measurements Methods and systems for thermal compensation of pressure measurements by a pressure gauge. Errors in pressure values are reduced by utilizing a predetermined correlation between the error in pressure measurements, due to temperature gradient in a pressure gauge, and... | 02/26/2008 |
| 7334480 | Dual membrane sensor for temperature compensated pressure sensing A pressure sensor that has a sensor membrane for exposure to fluid at a pressure to be sensed, and a compensation membrane sealed from the fluid at the pressure to be sensed. Associated circuitry connected to the sensor membrane converts deflection into an output si... | 02/26/2008 |
