Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7325455 | High-temperature piezoelectric vibration sensor assembly An integral connectorless hermetically sealed high-temperature piezoelectric sensor housing and cable assembly includes signal conditioning/processing circuitry having a charge amplifier-differential amplifier combination with integral trim capacitor and/or a voltag... | 02/05/2008 |
| 7081824 | Track monitoring equipment The alignment of railway tracks may be monitored using an accelerometer (36) mounted on a bogie (24) of a railway vehicle to detect lateral accelerations, and a displacement transducer (38) to monitor the lateral displacements of a wheelset (... | 07/25/2006 |
| 6911727 | Package for sealing an integrated circuit die A die has a part that is sealed with a cap. The seal can be hermetic or non-hermetic. If hermetic, a layer of glass or metal is formed in the surface of the die, and the cap has a layer of glass or metal at a peripheral area so that, when heated, the layers form a h... | 06/28/2005 |
| 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 |
| 6792819 | Method and system for analyzing motion transferred to a subject on a sleeping surface A method and system for analyzing the transfer of motion to a subject on a sleeping surface. A mattress is positioned on a frame, and a subject is positioned on the mattress. A sensor is placed in communication with the subject. The surface adjacent the subject is m... | 09/21/2004 |
| 6575031 | Transducer for measuring displacement of a vehicle spindle A transducer includes a body mountable to a vehicle spindle and a plurality of accelerometers coupled to the body. The plurality of accelerometers measure acceleration of the body. A calculation circuit coupled to the plurality of accelerometers receives ... | 06/10/2003 |
| 6389894 | Method for determining the heights of multiple jumps Comparable values for the heights of the individual jumps in a series of multiple jumps can be achieved, if defined initial conditions for first and second successive integrations of measured vertical forces are given for each individual jump. The initial... | 05/21/2002 |
| 6122959 | Method and apparatus for recording physical variables of transient acceleration events An acceleration recorder and related method for monitoring, discriminating, and recording acceleration events only when the acceleration and calculated velocity change both exceed selected trigger values. While the acceleration values meet a first, user-d... | 09/26/2000 |
| 6107616 | Power failure interrupt recovery for the pendulous oscillating gyroscopic accelerometer (POGA) A system for protecting a pendulous oscillating gyroscopic accelerometer (POGA) from power failure interruption (PFI) events, the POGA having a servo driven member (SDM), rotor driven member (RDM), and torque summing member (TSM), wherein the POGA is a pa... | 08/22/2000 |
| 5736970 | Accelerometer method and apparatus for integral display and control functions Method and apparatus for detecting mechanical vibrations and outputting a signal in response thereto. An accelerometer package having integral display and control functions is suitable for mounting upon the machinery to be monitored. Display circuitry pro... | 04/07/1998 |
| 5597954 | Bearing sensor and bearing-distance sensor A small and inexpensive bearing-distance sensor capable of detecting a travel bearing and a travel distance of a vehicle. The bearing-distance sensor includes a rectangular parallelepiped case. A first acceleration sensor and a second acceleration sensor ... | 01/28/1997 |
| 5541860 | Small size apparatus for measuring and recording acceleration A small size apparatus for measuring and recording acceleration comprises an acceleration sensor, an A/D converter which converts the output signal of the acceleration sensor to a digital signal, a control element which processes the digital signal, a det... | 07/30/1996 |
| 5517183 | Accelerometer method and apparatus for integral display and control functions Method and apparatus for detecting mechanical vibrations and outputting a signal in response thereto. Art accelerometer package having integral display and control functions is suitable for mounting upon the machinery to be monitored. Display circuitry pr... | 05/14/1996 |
| 5492010 | Position identification device using an accelerometer A device for determining position uses three voltage dividers. Each voltage divider is a metal conductor having a head on one end and two legs on an opposite end. The tips of the legs of each of the bodies are located in planes which are perpendicular to ... | 02/20/1996 |
| 5176431 | Vehicle deceleration prediction based on vehicle dive An improved scheme for predicting vehicle velocity independent of wheel speed for use in a vehicle antilock braking system (31) is disclosed and includes an arrangement for measuring variations in the separation between a reference point on the vehicle (1... | 01/05/1993 |
| 5130937 | Method and apparatus for storing velocity data A method and apparatus for determining a change in velocity of a body following a power disruptive event. An accelerometer (10, 50) includes quartz crystals (16 and 18, 60 and 62), which produce output signals indicative of the acceleration to which a bod... | 07/14/1992 |
| 5044201 | Double-integrating silicon acceleration sensing device A double integrating silicon acceleration sensing device which is solid state and micromachined measures the acceleration of an object and determines the distance travelled by that object through its trajectory. The device comprises a hermetically sealed ... | 09/03/1991 |
| 4932260 | Crash sensing switch with suspended mass A crash sensor for automobiles of the type including a sensing mass movable in a closed chamber against pressure resulting from viscous flow has a disk shaped sensing mass suspended by one or two webs like those used to suspend the moving elements of audi... | 06/12/1990 |
| 4712427 | Vibrating beam accelerometer with velocity change output A dual sensor, frequency output accelerometer that does not require either high sampling rates or mechanical matching of the sensors to achieve high levels of accuracy. In one embodiment, the accelerometer comprises a first sensor (12, 14, 16) that produc... | 12/15/1987 |
| 4611490 | Angular acceleration sensor A simple and shock-resistant device to measure angular acceleration about a predefined axis without using any spinning or vibrating mass. The device comprises a weight having a shape symmetrical with respect to an axis which becomes the aforementioned pre... | 09/16/1986 |
| 4365512 | Null circuit for use in an angular rate instrument An angular rate instrument adapted for mounting to a given object for measuring the rate of turn of the latter is disclosed herein. This instrument utilizes an angular accelerometer to sense angular acceleration to which the instrument is subjected and a ... | 12/28/1982 |
| 4361040 | Integrating angular accelerometer The present invention is directed to an integrating angular accelerometer ich has a neutrally buoyant mass, thereby eliminating the detrimental effect of high shock and vibration loads. The accelerometer includes a housing and an inertial mass positioned ... | 11/30/1982 |
| 4349769 | Incremental integrator and the resulting servosensors Precision incremental-output integrator of the type comprising: an operational amplifier mounted as analog summing integrator, which sums currents I1 and I2 at the integrator input, characterized by the fact that current I2 | 09/14/1982 |
| 4317105 | Condition indicating device for wheeled vehicle shock absorbers According to the invention, an accelerometer (G) is attached on the spring suspension (U) of the wheel (H) in question and capable upon passing of the vehicle over road irregularities to emit a decaying A.C. signal (S) with information on the oscillations... | 02/23/1982 |
| 4298777 | Distress gas generating signal balloon apparatus A crash force sensor is disclosed which may be used to activate emergency location systems such as a transmitter or an inflatable aerial tethered balloon. The crash force sensor comprises a casing and a moveable seismic mass held within the casing. A plur... | 11/03/1981 |
| 4109534 | Apparatus for monitoring acceleration There is disclosed an apparatus for monitoring acceleration of a body which utilizes liquid flow technology thus avoiding the need for electrical power. The apparatus includes steel balls of predetermined mass (hereafter "proof masses") disposed in annula... | 08/29/1978 |
| 4095547 | Acceleration measuring device An angular accelerometer incorporates two tilt sensors both connected to a differential amplifier arranged to provide a difference signal which is fed to a first integrator the output of which is fed to a second integrator. The tilt sensors are of the tor... | 06/20/1978 |
| 4085363 | Rate measuring system A rate measuring system for providing velocity signals, as desired, and displacement signals, including at least one accelerometer for providing an output voltage proportional to an acceleration input, amplifying means having an adjustable voltage gain fo... | 04/18/1978 |
| 4002077 | Integrating angular accelerometer An integrating angular accelerometer for measuring angular rate of a rotating body has a stationary cylindrical inertial mass supported by a low drag hydrostatic bearing concentrically in a housing rotatable relative thereto and filled with a viscous flui... | 01/11/1977 |
| 3998104 | Fluid pressure pulsed rebalanced accelerometer A force rebalanced accelerometer utilizing a spherical proof mass disposed in a fluid and in which fluid pressure pulses developed by positive displacement pump are used to balance inertial forces.... | 12/21/1976 |
| 3948107 | Velocity transducer A velocity sensor which may be modified to perform a sensing function for either angular velocity or linear velocity. The sensor has a base member which is split into upper and lower halves which are shaped to form internal walls defining an internal chan... | 04/06/1976 |
