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| Number | Title | Issue Date |
| 7395871 | Method for detecting a bit jam condition using a freely rotatable inertial mass An improved method is provided for controlling a power tool having a rotary shaft. The method includes: disposing an inertial mass in a housing of the power tool, such that the inertial mass is freely rotatable about an axis of rotation which is axially aligned with... | 07/08/2008 |
| 7204162 | Capacitive strain gauge A strain gauge for sensing strain is provided and includes a support substrate, and first and second electrodes supported on the substrate. The first and second electrodes include first and second capacitive plates, respectively. The first capacitive plates are mova... | 04/17/2007 |
| 7178397 | Apparatus and method for driving MEMS structure and detecting motion of the driven MEMS structure using a single electrode Apparatus and a method for driving and detecting a motion of MEMS structure using single electrode. Apparatus includes a driving signal generation part driving MEMS structure; a motion detection part detecting motion of MEMS structure and outputting a motion current... | 02/20/2007 |
| 7132936 | Angular rate sensor A sensor for measuring yaw rate or roll rate of an automotive vehicle comprises a freely rotating inertial disk and an angular rate sensor responsive to the rotation of the inertial disk relative to a housing. In one embodiment the inertial disk presents an alternat... | 11/07/2006 |
| 7109614 | Drive unit for determining a rotation position and/or rotation speed of a drive shaft A drive unit includes a housing and a drive shaft, in particular a spindle. The housing has a bearing which rotatably supports the drive shaft which is axially braced with the bearing by means of a clamping element. A measuring indication is arranged on the clamping... | 09/19/2006 |
| 7077007 | Deep reactive ion etching process and microelectromechanical devices formed thereby A process for forming a microelectromechanical system (MEMS) device by a deep reactive ion etching (DRIE) process during which a substrate overlying a cavity is etched to form trenches that breach the cavity to delineate suspended structures. A first general feature... | 07/18/2006 |
| 7039927 | Indication device and article incorporating same A disc or like article (10, 115, 119) rotatable by drive means, such as a compact disc for use with a computer, includes indication means (12, 110, 120) which, when the disc is rotated at or above a predetermined angular velocity, provide an indication... | 05/02/2006 |
| 6918282 | Self-test circuit and method for testing a microsensor A test circuit and method provide testing of a capacitive type microsensor. The method includes applying a first signal having a first voltage potential to an input of a microsensor during a non-test operating mode. The method also includes applying a second voltage... | 07/19/2005 |
| 6456939 | Micro inertial measurement unit A micro inertial measurement unit, which is adapted to apply to output signals proportional to rotation and translational motion of a carrier, respectively from angular rate sensors and acceleration sensors, is employed with MEMS rate and acceleration sen... | 09/24/2002 |
| 6393914 | Angular accelerometer An angular accelerometer having a substrate, a fixed electrode supported on the substrate and including a first plurality of fixed capacitive plates, and a ring-shaped rotational inertia mass substantially suspended over a cavity and including a plurality... | 05/28/2002 |
| 5537874 | Angular acceleration detector An angular acceleration detector (10) is provided with two slit-carrying discs (14, 15) mounted fixedly and coaxially in an opposed state on a rotary body (13), and a semiconductor position detecting unit (19) formed as a detecting means and consisting of... | 07/23/1996 |
| 5385052 | Inertial sensor An inertial sensor for measuring changes in rotational motion of a sensor support, having a flywheel rotationally movable in the plane of rotational motion relative to the sensor support and a measured value sensor picking up the rotational state of the f... | 01/31/1995 |
| 5224380 | Superconducting six-axis accelerometer A superconducting six-axis accelerometer (SSA) for measuring the linear and angular acceleration of a superconducting proof mass in all six degrees of freedom at the same point in space time. The proof mass is formed of interlocking plates defining three ... | 07/06/1993 |
| 4424712 | Wheel deceleration sensor In an anti-skid braking system, an improved sensor responsive to forces aciated with decleration of the vehicle road wheel. The sensor comprises a housing driven at a speed related to road wheel speed; an annular inertia mass is connected to the rotary h... | 01/10/1984 |
| 4189637 | Device for detecting angular acceleration of wheels A device for detecting angular acceleration of wheels comprising a first member integrally rotating with a wheel, a second member mounted on the first member through a resilient member so that the second member may be rotated relative to the first member.... | 02/19/1980 |
| 4077266 | Device for detecting angular accelerations and decelerations of a vehicle road wheel A device for detecting angular accelerations and decelerations of a vehicle wheel. The device comprises a first shutter member of cylindrical shape secured to a rotating member of a vehicle, which rotates with a vehicle road wheel, and having a cylindrica... | 03/07/1978 |
| 3965622 | Device for indicating the touching of a grinding wheel and a workpiece A device for indicating the touching of a grinding wheel and a workpiece. On a shaft connected to a spindle of a grinding wheel there is fixed a radially slotted or gear wheel. On the shaft there is also rotatably mounted another identical slotted wheel, ... | 06/29/1976 |
