Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 8063649 | Broadband high impedance pickoff circuit A measuring system minimizes the parasitic affects of lumped circuit elements. The system includes two or more in-situ interfaces configured to conductively link a source to an internal load and an external load. The in-situ interfaces are linked to a shunt conducto... | 11/22/2011 |
| 7999560 | Interference exclusion capability testing apparatus An interference exclusion capability testing apparatus is provided for use in testing interference exclusion capability of a specimen by radiating an electromagnetic wave toward the specimen from a radiating antenna. The radiating antenna includes an electromagnetic... | 08/16/2011 |
| 7969164 | Method and apparatus for mini module EMI shielding evaluation A method for mini module EMI shielding effectiveness evaluation comprises providing a test vehicle including at least one test platform. The test platform includes at least one mini emitter, a mini receiver with a reference shield, and a mini receiver with a shield ... | 06/28/2011 |
| 7911211 | Electromagnetic shielding defect monitoring system and method for using the same An embodiment disclosed herein is directed to a method of monitoring an electromagnetic shield effectiveness including transmitting a first electromagnetic field toward a first surface of an electromagnetic shield, detecting a second electromagnetic field transmitte... | 03/22/2011 |
| 7741856 | Immunity test system In an immunity test system of the present invention, a boundary point detection device changes a signal level of a transmission signal input to an antenna through a level adjusting device while monitoring an operation of an electronic equipment, and thereby detects ... | 06/22/2010 |
| 7675294 | System and method for determining attenuation of electromagnetic waves impacting an electromagnetic shield A method for determining attenuation of electromagnetic waves impacting an electromagnetic shield. A reference amplitude is provided. A signal exhibiting a first frequency is converted to a converted signal exhibiting a second frequency higher than the first frequen... | 03/09/2010 |
| 7595646 | System and method for information handling system peripheral EMC test Electromagnetic compatibility of an information handling system and peripheral for achieving defined electromagnetic interference constraints is tested through a test adapter that interfaces with an external cable connecting the information handling system and perip... | 09/29/2009 |
| 7554339 | Electromagnetic testing of an enclosure or cavity using a discrete frequency stir method The “discrete frequency stir” (DFS) method provides improved mode stir testing of electromagnetic characteristics of an enclosure/cavity. Adequate sampling of the electric field inside the enclosure/cavity is provided by electronic perturbation or “stirring”... | 06/30/2009 |
| 7459916 | Electromagnetic shielding defect monitoring system and method for using the same An embodiment disclosed herein is directed to an electromagnetic shielding defect monitoring system that includes a transmit system adapted to transmit a first electromagnetic field toward a first surface of an electromagnetically shielded enclosure, thereby generat... | 12/02/2008 |
| 7414414 | Spatially distributed guarded impedance A guarded sense impedance for use in a measurement instrument includes a sense impedance adapted to have a spatially distributed electrical potential and at least one guard structure adapted to have the spatially distributed electrical potential. The guard structure... | 08/19/2008 |
| 7403025 | Membrane probing system A membrane probing assembly includes a probe card with conductors supported thereon, wherein the conductors include at least a signal conductor located between a pair of spaced apart guard conductors. A membrane assembly includes a membrane with contacts thereon, an... | 07/22/2008 |
| 7336230 | Method for measuring electromagnetic radiation pattern and gain of radiator using term waveguide A method for measuring electromagnetic radiation pattern and gain of radiator using TEM waveguide is disclosed. The method includes the steps of: a) measuring powers of output port of a transverse electric and magnetic (TEM) waveguide by changing arrangements of the... | 02/26/2008 |
| 7332902 | Micro sensor for electrochemically monitoring residue in micro channels The present invention provides a micro sensor for monitoring the cleaning and drying processes for very high aspect ratio micro channels in dielectric films oriented parallel to the fluid-solid interface during the manufacture of ICs, MEMS and other micro-devices. T... | 02/19/2008 |
| 7323884 | RF test chamber A system for testing radio frequency (RF) communications of a device capable of such communications is provided. The system includes a chamber for isolating the device from RF interference, an antenna that is suitable for RF communications with the device wherein th... | 01/29/2008 |
| 7317317 | Shielded micro sensor and method for electrochemically monitoring residue in micro features The micro sensor is fabricated with a guard that shields the electrodes from the surrounding environment, thereby reducing loss of measurement signal through the parasitic capacitances to the substrate and fluid. The guards are low impedance points in the circuit th... | 01/08/2008 |
| 7293705 | Radio frequency identification method and system of distributing products A method and system for vending products from a defined area, such as a micro-warehouse with a door. The method includes fitting each product with a radio frequency identification tag, positioning the plurality of products in a micro-warehouse, sensing opening and c... | 11/13/2007 |
| 7294996 | Characteristic evaluating system and characteristic evaluating method The characteristic evaluating system of the present invention includes: a cable-driving transmitter transmitting a signal to one end of a cable to be measured; a load connected to the other end of the cable; a probe detecting a common mode current of the cable; a re... | 11/13/2007 |
| 7295154 | Vehicle obstacle warning radar A method for detecting an object using a transmitting antenna and an array of receiving antennas. The method comprises the step of transmitting a signal from the transmitting antenna. The magnitude and phase of a respective received signal at each of the receiving a... | 11/13/2007 |
| 7292057 | Probe station thermal chuck with shielding for capacitive current To reduce noise in measurements obtained by probing a device supported on surface of a thermal chuck in a probe station, a conductive member is arranged to intercept current coupling the thermal unit of the chuck to the surface supporting the device. The conductive ... | 11/06/2007 |
| 7288940 | Galvanically isolated signal conditioning system A galvanically isolated signal conditioning system includes a signal conditioning circuit on an integrated circuit chip; a flying capacitor; and a galvanically isolating MEMS switching device on an integrated circuit chip for selectively switching the flying capacit... | 10/30/2007 |
| 7285962 | Method and apparatus for evaluating susceptibility to common mode noise in a computer system A system for injecting noise signals onto power generated by a power source comprising: a voltage source; a device under test having a power input in operable communication with the noise introduction apparatus; and a noise introduction apparatus interposed between ... | 10/23/2007 |
| 7258276 | Radio frequency identification method and system of distributing products A method and system for vending products from a defined area, such as a micro-warehouse with a door. The method includes fitting each product with a radio frequency identification tag, positioning the plurality of products in a micro-warehouse, sensing opening and c... | 08/21/2007 |
| 7260511 | Design aid apparatus and design evaluation method for electronic device A design aid apparatus includes an input section, an antenna propensity determination section, an output section, and a memory storing design data for a plurality of structures comprising an electronic device to be designed. Conductivity of a structure is determined... | 08/21/2007 |
| 7259570 | Magnetic signal measurement apparatus As the length of a cylinder of a magnetically shielding apparatus is shorter, the amount of magnetism of a component perpendicular to an axis of the cylinder which enters the opening portion of the cylinder is larger, resulting in a lower magnetic shield effect. A s... | 08/21/2007 |
| 7242178 | Digital cable toning apparatus and method A digital toner/locator employs tone packets using a 455 Khz. carrier. Plural packet quanta provide multiple test modes which are advantageously selected from a probe without requiring returning to the tone generator to change mode. A locate and isolate mode are pro... | 07/10/2007 |
| 7242176 | Systems and methods for evaluating electromagnetic interference Systems and methods for evaluating electromagnetic interference that may be employed, for among other things, to evaluate electronic system immunity to radiated electromagnetic fields and/or to identify particular electronic system areas that are susceptible to elec... | 07/10/2007 |
| 7242179 | Digital circuit for frequency and timing characterization A digital circuit operating frequency characterizer provides a combination of frequency and duty cycle characterization. The digital circuit operating frequency characterizer includes a programmable frequency generator, a programmable edge variator, a test engine, a... | 07/10/2007 |
| 7235986 | Capacitive position sensing system with resonant amplification At least one exemplary embodiment of the present invention includes a capacitive sensing system, comprising a sensing conductor coupleable to a grounded target by a gap capacitance Cd, said grounded target separated from said sensing conductor by a gap ha... | 06/26/2007 |
| 7228519 | Program for causing a computer to execute a method of generating mesh data and apparatus for generating mesh data A method of generating mesh data by orthogonally dividing a target object into a mesh of elements by a plurality of grid lines orthogonally crossing each other includes the steps of (a) detecting vertexes of the target object; and (b) dividing the target object orth... | 06/05/2007 |
| 7224172 | Device and method for shielding electromagnetic emissions of equipment service vehicle A system for shielding an engine component of an equipment service vehicle including an enclosure, wherein the enclosure includes a surface having a plurality of apertures formed in the surface of the enclosure, the plurality of apertures being dimensioned to minimi... | 05/29/2007 |
| 7222033 | Electromagnetic emissions and susceptibility calculating method and apparatus A method and apparatus that predicts electromagnetic emissions and susceptibility attributes of an electric device. A simulation is conducted which utilizes a series of mathematical calculations to predict performance of four facets of electromagnetic interference (... | 05/22/2007 |
| 7196657 | Radar system using RF noise A radar system that utilizes predetermined, pseudorandom, or random waveforms that may be substantially matched to the impulse response of the radar and any surrounding clutter such that the signal-to-clutter ratio may be optimized and/or such that specific targets ... | 03/27/2007 |
| 7190301 | Radio frequency anechoic chamber with nonperturbing wireless signalling means An anechoic chamber (100) is provided with a system for introducing wireless communication signals into the anechoic chamber (100) for establishing wireless signaling with equipment under test (122), without interfering with signals from the equ... | 03/13/2007 |
| 7173434 | Method for determining the RF shielding effectiveness of a shielding structure Determining the RF shielding effectiveness of a shielding structure including measuring RF isolation between a first and a second element of a directional coupler and providing a first measurement result, placing a shielding structure so that a part of the shielding... | 02/06/2007 |
| 7165720 | Radio frequency identification method and system of distributing products A method and system for vending products from a defined area, such as a micro-warehouse with a door. The method includes fitting each product with a radio frequency identification tag, positioning the plurality of products in a micro-warehouse, sensing opening and c... | 01/23/2007 |
| 7161357 | Apparatus for measuring read range between RFID tag and reader Provided is an apparatus for measuring a read range between a tag and a reader, which includes an electromagnetic anechoic chamber formed by connecting at least one unit cell in a row, the unit cell having an electromagnetic wave absorbent provided on an inner wall ... | 01/09/2007 |
| 7148711 | Membrane probing system A membrane probing assembly includes a probe card with conductors supported thereon, wherein the conductors include at least a signal conductor located between a pair of spaced apart guard conductors. A membrane assembly includes a membrane with contacts thereon, an... | 12/12/2006 |
| 7145348 | Sensor device with coated electric wire shielding A coated electric wire is wound around a detection circuit in a planar manner for the purpose of electrostatic shield. This winding is performed, for example, spirally in a single layer. In the case where there are further provided a detection circuit board includin... | 12/05/2006 |
| 7146091 | Method and system for automated simulation of cable failure in a network A method, system and device for simulating cable failures in a network are disclosed. In a first aspect, a plurality of optical cables which couple a plurality of devices within the network to each other are provided. The method and system includes providing at leas... | 12/05/2006 |
| 7138809 | Electrical capacitance proximity sensor An electrical capacitance proximity sensor with high detector sensitivity has an insulating substrate, a detector electrode and an earth electrode formed in a fixed pattern on one face of the insulating substrate, and a detector circuit which detects an object appro... | 11/21/2006 |
