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| Number | Title | Issue Date |
| 7080553 | Micro-accelerometer A micro-accelerometer includes first and second closed cavities, into each of which an equal quantity of gas is introduced. A membrane partitions the symmetrical first and second cavities. Temperature sensors are provided within the first and second cavities, respec... | 07/25/2006 |
| 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 |
| 6674383 | PWM-based measurement interface for a micro-machined electrostatic actuator Methods and apparatus for varying and measuring the position of a micromachined electrostatic actuator using a pulse width modulated (PWM) pulse train are disclosed. One or more voltage pulses are applied to the actuator. In each of the pulses, a voltage ... | 01/06/2004 |
| 5048319 | Method for calibrating an acceleration sensor The acceleration sensor has an elastic member (11) to which an inertial body (12) is attached. Upon the occurrence of an acceleration force, the elastic member (11) is deformed. In order to measure the absolute value of the acceleration, a calibration may... | 09/17/1991 |
| 4822999 | Apparatus and method for detecting movement of an object The movement of a body (1) is determined by mounting on or in the body one or more sources (3,4) and one or more detectors (12,14) such that each source propagates polychromatic light along a path to a detector. Radiation modulation means (19;25) is suppo... | 04/18/1989 |
| 4644803 | Force measurement apparatus and method Fluid density measuring apparatus and method for directly measuring fluid density or indirectly measuring force, acceleration, flow velocity, differential pressure and other parameters affecting the apparatus. The apparatus includes a bellows and a genera... | 02/24/1987 |
| 4222271 | Digital fluidic output force balance accelerometer A digital fluidic output accelerometer which has a proportional fluid ampier for balancing forces acting on a mass which is rotatably mounted on air bearing means and has a digital fluidic output which produces digital signals that are proportional to ac... | 09/16/1980 |
| 3975961 | Fluidic transverse-impact modulator accelerometer A fluidic accelerometer employing a transverse-impact modulator for measug acceleration or velocity of a body along a specified axis of the accelerometer. This device uses two similar collinear power-input tubes directed toward each other. The axially op... | 08/24/1976 |
| 3973442 | Fluidic direct-impact modulator accelerometer A fluidic accelerometer employing a direct-impact modulator for measuring celeration or velocity of a body along a specified axis of the accelerometer. This device uses two similar collinear power-input tubes directed toward each other. The axially opposi... | 08/10/1976 |
