Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7363814 | Multi-axial angular velocity sensor An angular velocity sensor for detecting angular velocity about a Z-axis in an XYZ coordinate system has a substrate oscillator, a flexible member for connecting the oscillator to a casing, a device for oscillating the oscillator in an X-axis direction, and a detect... | 04/29/2008 |
| 7357025 | Micromachined apparatus with co-linear drive arrays A mass includes a first set of drive fingers interdigitated with a first array of fixed drive fingers and a second set of drive fingers interdigitated with a second array of fixed drive fingers. Each array of fixed drive fingers is affixed to a substrate using a plu... | 04/15/2008 |
| 7348745 | Controller First and second acceleration detectors are attached to first and second sections on a driven body, and values of accelerations α1 and α2 in a travel direction of the driven body are detected. On the basis of the difference or sum of the acceleration... | 03/25/2008 |
| 7347094 | Coupling apparatus for inertial sensors A coupling apparatus allows anti-phase movements of inertial sensor element frames along parallel axes but substantially prevents in-phase movements of the frames. The coupling apparatus includes a bar coupled between first and second sensor element frames and at le... | 03/25/2008 |
| 7337665 | Method for electronically tuning the readout vibration of a coriolis gyroscope In a method for electronic tuning of the frequency of the read oscillation to the frequency of the stimulation oscillation in a Coriolis gyro, the resonator of the Coriolis gyro has a disturbance force applied to it such that the stimulation oscillation remains esse... | 03/04/2008 |
| 7328616 | Digital angular velocity detection device A digital angular velocity detection device, including a stat or formed on a substrate. A rotor operable to rotate in response to an external force is provided. The rotor has a plurality of electrodes formed at regular intervals on a curve at a predetermined radius ... | 02/12/2008 |
| 7295184 | Computer input device A computer input device includes a magnetized fluid and an inertial body within the magnetized fluid. A signal converter provides angular acceleration information based on behavior of the inertial body. The computer input device can be attached to a Virtual Reality ... | 11/13/2007 |
| 7287428 | Inertial sensor with a linear array of sensor elements An inertial sensor includes at least one pair of sensor elements arranged in a linear array. Each sensor element has a frame and a movable mass suspended within the frame. The frames of each pair of sensor elements may be coupled so that the frames are allowed to mo... | 10/30/2007 |
| 7260991 | Rotation-rate sensor A micromechanical rotation-rate sensor includes a substrate, an anchoring device provided on the substrate, as well as a first spiral spring device and a second spiral spring device, the two spiral spring devices being provided next to one another in mirror symmetry... | 08/28/2007 |
| 7250112 | Method of making an X-Y axis dual-mass tuning fork gyroscope with vertically integrated electronics and wafer-scale hermetic packaging A method for making an angular velocity sensor having two masses which are laterally disposed in an X-Y plane and indirectly connected to a frame is provided. The two masses are linked together by a linkage such that they necessarily move in opposite directions alon... | 07/31/2007 |
| 7232700 | Integrated all-Si capacitive microgyro with vertical differential sense and control and process for preparing an integrated all-Si capacitive microgyro with vertical differential sense The present invention relates to a method of manufacturing a cloverleaf microgyroscope containing an integrated post comprising: attaching a post wafer to a resonator wafer, forming a bottom post from the post wafer being attached to the resonator wafer, attaching t... | 06/19/2007 |
| 7216539 | Micromachined apparatus with split vibratory masses Each of a number of resonator masses is split into two separate lobes or masses joined together by a short flexure. The short flexure allows the separate lobes or masses to rotate slightly as they resonate so as to substantially relieve longitudinal stresses in cert... | 05/15/2007 |
| 7204144 | Micromachined apparatus with drive/sensing fingers in coupling levers Resonator structures include a plurality of resonator masses interconnected by a plurality of levers so as to resonate in anti-phase with one another. The levers include a plurality of lever fingers interdigitated with corresponding fixed fingers affixed to an under... | 04/17/2007 |
| 7202100 | Method of manufacturing a cloverleaf microgyroscope and cloverleaf microgyroscope The present invention relates to a method of manufacturing a cloverleaf microgyroscope containing an integrated post comprising: attaching a post wafer to a resonator wafer, forming a bottom post from the post wafer being attached to the resonator wafer, attaching t... | 04/10/2007 |
| 7191652 | Magnetofluidic accelerometer with partial filling of cavity with magnetic fluid A sensor includes a housing and a magnetic fluid within the housing that incompletely fills the housing. An inertial body is in contact with the magnetic fluid. Displacement of the inertial body relative to the magnetic fluid is indicative of acceleration on the hou... | 03/20/2007 |
| 7143648 | Magnetofluidic accelerometer with capacitive sensing of inertial body position An accelerometer includes an inertial body; a magnetized fluid holding the inertial body in suspension; and a plurality of capacitive elements, each forming a capacitor with the inertial body. A displacement of the inertial body produces a change of capacitance of t... | 12/05/2006 |
| 7124552 | Device for screwing screw-type closures onto containers A device for screwing a screw cap onto a container with a magnetic coupling arranged between a spindle which can be driven and the closing head, and in the circumferential area of permanent magnets connected to the closing head, an inductive detector for determining... | 10/24/2006 |
| 7089792 | Micromachined apparatus utilizing box suspensions A micromachined gyroscope makes use of Coriolis acceleration to detect and measure rotation rate about a plane normal to the surface of a substrate. Specifically, various resonating structures are suspended within a frame. The resonating structures include phase and... | 08/15/2006 |
| 7059188 | Angular velocity sensor A flexible substrate (110) having flexibility and a fixed substrate (120) disposed so as to oppose it are supported at their peripheral portions by a sensor casing (140). An oscillator (130) is fixed on the lower surface of the flexible s... | 06/13/2006 |
| 7032451 | Micromachined sensor with quadrature suppression Quadrature suppression is provided by placing a resonator mass adjacent to a quadrature suppression electrode. The resonator mass is capable of moving substantially parallel to the quadrature suppression electrode and includes a notch formed adjacent to a portion of... | 04/25/2006 |
| 7017411 | Apparatus with selected fill gas An inertial sensor has an interior filled with a relatively low viscosity fill gas. To that end, the inertial sensor has a housing forming the noted interior, and a movable component within the interior. The inertial sensor also has the noted fill gas within the int... | 03/28/2006 |
| 7015060 | Cloverleaf microgyroscope with through-wafer interconnects and method of manufacturing a cloverleaf microgyroscope with through-wafer interconnects The present invention relates to a method of manufacturing a cloverleaf microgyroscope containing an integrated post comprising: attaching a post wafer to a resonator wafer, forming a bottom post from the post wafer being attached to the resonator wafer, preparing a... | 03/21/2006 |
| 6941810 | Angular velocity sensor An angular velocity sensor for detecting an angular velocity component includes an oscillator having mass, a sensor casing for accommodating the oscillator therewithin, a flexible member for connecting the oscillator to the sensor casing so that the oscillator can b... | 09/13/2005 |
| 6939473 | Method of making an X-Y axis dual-mass tuning fork gyroscope with vertically integrated electronics and wafer-scale hermetic packaging A method for making an angular velocity sensor having two masses which are laterally disposed in an X-Y plane and indirectly connected to a frame provided. The two masses are linked together by a linkage such that they necessarily move in opposite directions along Z... | 09/06/2005 |
| 6925876 | Multiple output inertial sensing device An inertial sensor includes a single sense element disposed upon a silicon wafer. The sense element is electrically connected to a plurality of signal conditioning circuits that generate output signals in different ranges. Each signal conditioning circuit has an out... | 08/09/2005 |
| 6912921 | Torque detecting device A torque detecting device includes an elastic member disposed between an input shaft and an output shaft of a torque transmitting apparatus, first and second resolvers detecting rotational angles of the elastic member at sides of the input shaft and the output shaft... | 07/05/2005 |
| 6915215 | Integrated low power digital gyro control electronics Embodiments of the invention generally encompass a digital, application specific integrated circuit (ASIC) has been designed to perform excitation of a selected mode within a vibratory rate gyroscope, damping, or “force-rebalance,” of other modes within the sens... | 07/05/2005 |
| 6904377 | Method for measuring force-dependent gyroscope sensitivity System and method for measuring force-dependent gyroscopic sensitivity. A force-effect model of the effects of acceleration on the output of a gyro triad is determined. Rotation sequences are then devised to permit excitation and observation of force-effect model pa... | 06/07/2005 |
| 6845667 | High Q angular rate sensing gyroscope A structure and arrangement for improving the accuracy and efficiency of an angular rate sensing gyroscope is herein disclosed. Voltage pick-off conductors are applied to an area of the surface of a resonating element of an angular rate sensing gyroscope that is sub... | 01/25/2005 |
| 6842153 | Instrument alignment devices and methods An apparatus for determining an instrument boresight azimuth heading. A typical apparatus comprises a gyro having a first input and a first output and a rocking angle generator having a second output, wherein the second output is communicatively coupled to the first... | 01/11/2005 |
| 6742388 | Device for measuring the angular velocity of a pivotally mounted vehicle element A vehicle is provided, including a vehicle body; at least one vehicle element pivotally mounted to the vehicle, the vehicle element configured to pivot through an angle not more than 360 degrees; and a measuring arrangement configured to measure an angular velocity ... | 06/01/2004 |
| 6686807 | Time base comprising an integrated micromechanical ring resonator A time base having a resonator (4) and an integrated electronic circuit (3) for driving the resonator into oscillation and for producing, in response to this oscillation, a signal having a determined frequency. The resonator is an integrated micromechanic... | 02/03/2004 |
| 6668648 | Acceleration detection type gyro device An acceleration-detecting type gyro apparatus of an electrostatic supporting type, in which displacements of a gyro rotor are actively made zero is proposed. The acceleration-detecting type gyro apparatus includes: a gyro case; a gyro rotor which is suppo... | 12/30/2003 |
| 6626039 | Electrically decoupled silicon gyroscope An oscillatory gyroscope is described with decoupled drive and sense oscillators and reduced cross-axis sensitivity. The gyroscope is fabricated using a plasma micromachining process on standard silicon wafers. The electrical isolation of the drive and se... | 09/30/2003 |
| 6609037 | Gimbal pointing vector stabilization control system and method A hybrid stabilization system for isolating a pointing vector of a gimbal from the motion of a vehicle base is provided. The hybrid stabilization control system includes a rate feedback loop generating a rate feedback compensation value in response to a m... | 08/19/2003 |
| 6601450 | Two axis open loop gyroscope A gyroscope having a rotor mounted onto a rotating shaft wherein the rotor has a circular flange extending from and perpendicular to one surface thereof. A suspension member having a flexible flange is affixed concentric with the rotating shaft and the ro... | 08/05/2003 |
| 6553833 | Device for bias potential generation for an oscillating rotation speed sensor The invention relates to a device for generating bias voltages for the electrodes of a rotation rate sensor. By evaluating a rotation rate signal and a quadrature signal, control signals are generated, using an adaptive quadrature compensator, that are co... | 04/29/2003 |
| 6516666 | Yaw rate motion sensor A yaw rate motion sensor (10) that includes a driving element (12) having a first axis for oscillating generally in the direction of the first axis upon application of a driving voltage. The motion sensor (10) includes a sensing element (14) for sensing r... | 02/11/2003 |
| 6308573 | 3-Dimensional comb structure and actuator and inertia detection sensor both using the comb structure A 3-dimensional comb structure using an electrical force, and an inertial detection sensor and an actuator both using the 3-dimensional comb structure are provided. In the 3-dimensional comb structure, a suspension structure, which is an inertia body, is ... | 10/30/2001 |
| 6308567 | Angular velocity sensor A compact angular velocity sensor, which can improve an S/N (signal/noise) ratio. An angular velocity sensor includes an SOI substrate, four oscillatory masses movably supported to the SOI substrate, and four detection electrodes provided outer side of th... | 10/30/2001 |
