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| Number | Title | Issue Date |
| 7595570 | Solid state pressure switch A pressure switch employs a Wheatstone bridge incorporating piezoresistive elements. The output of the bridge is monitored by a control circuit which produces a first control signal when a high pressure is achieved and produces a second control signal when a low pre... | 09/29/2009 |
| D600728 | Optical filter assembly | 09/22/2009 |
| 7584665 | Combustion transducer apparatus employing pressure restriction means A pressure restrictor for use with a pressure sensing element comprising a cylindrical member of a given diameter and length having a plurality of apertures directed from a first end to a second end is disclosed. A pressure restrictor housing holds and positions the... | 09/08/2009 |
| D597936 | Twin battery pack | 08/11/2009 |
| 7559248 | High pressure transducer having an H shaped cross-section A high pressure transducer has an H shaped cross-section with a center arm of the H having a top and bottom surface with the top surface of the H accommodating four strain gauges. Two strain gauges are located at the center of the top portion of the center arm of th... | 07/14/2009 |
| 7559246 | Sensor for measuring low dynamic pressures in the presence of high static pressures A sensor is described, which basically consists of a leadless high sensitivity differential transducer chip which responds to both static and dynamic pressure. Located on the transducer are two sensors. One sensor has a thicker diaphragm and responds to both static ... | 07/14/2009 |
| 7540704 | Method and system for determining gas turbine tip clearance A system for sensing at least one physical characteristic associated with an engine including a turbine having a plurality of blades turning inside a casing, the system including: a pressure sensor coupled substantially adjacent to the casing and including at least ... | 06/02/2009 |
| 7540196 | Pressure transducer adapted to measure engine pressure parameters A pressure header assembly has a closed front and back surface. The back surface has an aperture for accommodating a separate dual die pressure header. The dual die pressure header has an absolute and differential pressure sensor positioned thereon. A differential p... | 06/02/2009 |
| 7530274 | Apparatus for providing an output proportional to pressure divided by temperature (P/T) A circuit produces an output that is proportional to the molar density of gas in a chamber. The circuit employs an operational amplifier which measures the temperature using a RTD or other element that changes resistance with temperature. The RTD is placed such that... | 05/12/2009 |
| 7526962 | High pressure delta P sensor A high pressure transducer has a metal housing with a main inlet high pressure port at one end and a reference pressure port at the other end. The ports communicate with a central hollow of the housing. Positioned in the hollow and communicating with the main inlet ... | 05/05/2009 |
| 7516675 | Joystick sensor apparatus A joystick apparatus employs a hermetically sealed load cell having strain gauges placed on flexible beams formed on the load cell. All of the strain gauges are on the same surface of the load cell and therefore wiring is performed on a single side of the load cell.... | 04/14/2009 |
| 7516668 | Silicon carbide piezoresistive pressure transducer and method of fabrication A high temperature pressure transducer is fabricated from silicon carbide. A wafer of silicon carbide has reduced or active areas which act as deflecting diaphragms. Positioned on the reduced or active area is a silicon carbide sensor. The sensor is secured to the s... | 04/14/2009 |
| 7512797 | Interface for facilitating facsimile transmissions via wireless communications networks An interface for facilitating facsimile transmission via a wireless communications device operatively connected to a wireless communications network, including: a modem suitable for being communicatively coupled to a facsimile machine; a controller coupled to the mo... | 03/31/2009 |
| D589545 | Optical filter assembly | 03/31/2009 |
| D586932 | Twin beam headlight | 02/17/2009 |
| 7484415 | Pressure transducer employing a micro-filter and emulating an infinite tube pressure transducer A pressure transducer for measuring pressures in high temperature environments employs a tube which is terminated at one end by an acoustic micro-filter. The acoustic filter or micro-filter has a plurality of apertures extending from one end to the other end, each a... | 02/03/2009 |
| 7484418 | Ultra miniature multi-hole probes having high frequency response A pressure probe includes a longitudinal tubular housing symmetrically disposed about a central axis and having an ultra miniature conical front end and an opened back end. A plurality of aperture ports having an opening are disposed about the front end. A plurality... | 02/03/2009 |
| 7478562 | High temperature LC pressure transducer and methods for making the same A high temperature pressure capacitor is fabricated utilizing two high temperature substrate wafers. The substrates may be silicon carbide (SiC) or aluminum nitride (AIN). The first substrate has a metal conductive plate positioned on a top surface thereof. The top ... | 01/20/2009 |
| D583756 | Battery pack | 12/30/2008 |
| 7464600 | Combined temperature and pressure transducer incorporating connector keyway alignment and an alignment method A transducer sensor is positioned within a hollow of the body of a housing. The housing has an extending alignment pin, which pin coacts with a corresponding slot or aperture in the wall of a vessel whose pressure or temperature is to be monitored. The transducer bo... | 12/16/2008 |
| D582085 | Illuminating headlamp | 12/02/2008 |
| 7451655 | High temperature pressure sensing system A high temperature pressure sensing system (transducer) including: a pressure sensing piezoresistive sensor formed by a silicon-on-insulator (SOI) process; a SOI amplifier circuit operatively coupled to the piezoresistive sensor; a SOI gain controller circuit includ... | 11/18/2008 |
| 7448254 | Method and apparatus for measuring knocking in internal combustion engines A method and apparatus for measuring knocking in internal combustion engines employs a high temperature transducer, which transducer is mounted within a cylinder. The output of the transducer is solely related to pressure. The output signal from the transducer is di... | 11/11/2008 |
| 7444879 | Displacement transducer A displacement transducer includes a load cell structure having a thick outer peripheral area, a thick inner central area and two symmetrical thin beams. The two beams are disposed along a common diameter of the structure and joins the outer peripheral area and the ... | 11/04/2008 |
| 7440645 | Micromachined optical pressure sensor A pressure sensor including: a deflectable diaphragm including a substantially central boss and channel; and, an optical waveguide having first and second arms, wherein the first arm is substantially aligned with an edge of the boss and the second arm is substantial... | 10/21/2008 |
| 7441120 | Telecommunications device and method A method for selectively enhancing a voice telephone call from a first location to a second location over a public switched telephone network, including receiving audio signals from a conventional telephone using a first device positioned at the first location; and,... | 10/21/2008 |
| 7439159 | Fusion bonding process and structure for fabricating silicon-on-insulator (SOI) semiconductor devices A method of fabricating a semiconductor-on-insulator device including: providing a first semiconductor wafer having an about 200 angstrom thick oxide layer thereover; etching the first semiconductor wafer to raise a pattern therein; doping the raised pattern of the ... | 10/21/2008 |
| 7436037 | Moisture resistant pressure sensors A differential pressure sensor has a semiconductor wafer having a top and bottom surface. The top surface of the wafer has a central active area containing piezoresistive elements. These elements are passivated and covered with a layer of silicon dioxide. Each eleme... | 10/14/2008 |
| 7432795 | Pressure sensor header having an integrated isolation diaphragm A pressure sensor header for a pressure transducer includes a header shell having a sensor cavity formed therein, a sensor element disposed in the sensor cavity, a fluid medium disposed in the sensor cavity, an isolation diaphragm closing the sensor cavity, and a jo... | 10/07/2008 |
| 7430665 | Portable telecommunication security device A portable security device for providing secure communications over a plurality of networks is presented. In one embodiment, the device comprises, at least one communication port for transfer of audio data, at least one communication port for transfer of digital dat... | 09/30/2008 |
| 7409866 | Signal transmission system A single wire interface for a transducer transmits the transducer output as a frequency modulated signal over one single wire during one interval. During a second interval a reference signal is transmitted as a frequency modulated signal. Both the transducer output ... | 08/12/2008 |
| 7369032 | Method of joining a pressure sensor header with an associated transducer element A pressure transducer assembly including: a pressure sensor header; a transducer assembly member; and a joining arrangement disposed at an interface of the header and the transducer assembly member, for joining the header with the transducer assembly member, the joi... | 05/06/2008 |
| 7363820 | Ultra high temperature hermetically protected wirebonded piezoresistive transducer An ultra high temperature hermetically protected transducer includes a sensor chip having an active area upon which is deposited piezoresistive sensing elements. The elements are located on the top surface of the silicon wafer chip and have leads and terminals exten... | 04/29/2008 |
| 7358581 | Quantum dot based pressure switch A semiconductor heterostructure based pressure switch comprising: first and second small bandgap material regions separated by a larger bandgap material region; a third small bandgap material region within the region of larger bandgap material, the third material re... | 04/15/2008 |
| 7347098 | Apparatus for providing an output proportional to pressure divided by temperature (P/T) A circuit produces an output that is proportional to the molar density of gas in a chamber. The circuit employs an operational amplifier which measures the temperature using a RTD or other element that changes resistance with temperature. The RTD is placed such that... | 03/25/2008 |
| 7343808 | Line pressure compensated differential pressure transducer assembly A pressure transducer apparatus including: first and second pluralities of piezoresistors each coupled in Wheatstone bridge configurations, wherein the bridges are coupled together to provide a first output being indicative of a differential pressure; and, a third p... | 03/18/2008 |
| 7327080 | Hybrid active matrix thin-film transistor display A field emission display comprises an anode comprising a matrix of pixels and a cathode comprising an insulating layer defining a plurality of wells having a conductor therein. A first conductive layer forms a plurality of conductive pads, each of the conductive pad... | 02/05/2008 |
