Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 7818989 | Device and method for checking and/or calibrating a passenger recognition device arranged in a vehicle seat The invention relates to a device and a method for checking and/or calibrating a passenger recognition device arranged in a vehicle seat, in the case of which device a child's seat can be pressed against a vehicle seat and in the case of which method a vehicle seat ... | 10/26/2010 |
| 7574892 | Device and method for checking and/or calibrating a passenger recognition device arranged in a vehicle seat The invention relates to a device and a method for checking and/or calibrating a passenger recognition device arranged in a vehicle seat, in the case of which device a child's seat can be pressed against a vehicle seat and in the case of which method a vehicle seat ... | 08/18/2009 |
| 7331209 | Transducer acceleration compensation with frequency domain amplitude and/or phase compensation A method and system for correcting for the inertial error of a transducer as a function of frequency or effective mass coupling. ... | 02/19/2008 |
| 7318335 | Ultrasonic gas leak detector including a detector testing device An ultrasonic gas leak detector of the kind where a detector transducer senses airborne acoustic ultrasonic sound waves emitted from a leakage in a gas installation is provided. The detector is provided with self-test means according to which an ultrasonic signal is... | 01/15/2008 |
| 7100419 | Method for simulating a dynamic force response and method of calibration A method of simulating a dynamic force event comprises rotating a cam about an axis according to a rotational speed profile and biasing a follower against a surface of the cam as the cam rotates so that the follower moves on the surface and imparts a braking force a... | 09/05/2006 |
| 7093478 | Method for calibrating accelerometer sensitivity A method for calibrating the sensitivity of a micromachined differential-capacitor accelerometer without applying mechanical stimulation, such as shaking. The accelerometer is fabricated with dimensional control structures so that a dimensional relationship is set-u... | 08/22/2006 |
| 7089775 | Device and method for calibrating a sensor A device and a method for calibrating a sensor, e.g., a force sensor such as a belt-force sensor, which allow reliable calibration of the sensor in a simple manner to counteract age-related distortion of measured values. The device for calibrating a sensor includes ... | 08/15/2006 |
| 7086270 | Method for continuous sensor self-test A method and device for self-test of a sensor. The method includes stimulating the sensor with signals that generate sensor outputs at a frequency that differs from the frequency of expected sensed parameter signals. The sensor output is filtered to remove the effec... | 08/08/2006 |
| 6948387 | Clamp calibration apparatus and method The invention provides an apparatus and method to calibrate a clamp, such as a wire clamp, which is suitable for use with a wire-bonding machine for semiconductor devices. A contact means is arranged to be contacted by an arm of the clamping device and a sensing mec... | 09/27/2005 |
| 6935956 | Control apparatus and detecting device A control apparatus includes a pressure-sensitive device for providing an analog signal responsive to an applied pressure, a level segmenting unit for segmenting the analog signal into output levels and an analog-to-digital (A/D) converting unit for converting the s... | 08/30/2005 |
| 6937143 | Passenger detecting apparatus for vehicle The present invention relates to a vehicle passenger detecting apparatus capable of detecting an unoccupied-seat state through the use of existing signals in a vehicle and correcting an unoccupied-seat reference value with a simple configuration. In a case in which ... | 08/30/2005 |
| 6928853 | Method and device for the hysteresis correction of measured values for sensors with extensometers A transducer including a deformation body with a strain gage produces hysteresis-affected measured values based on the strain of the deformation body. Each measured value is to be corrected by the hysteresis error. For this purpose, a hysteresis model is formed from... | 08/16/2005 |
| 6889584 | Wrench A wrench includes a main shaft having a working portion provided at the top thereof; a torsion member having an elastic restoring force against torsion about the axis of the main shaft; at least one operating handle disposed so as to intersect with the middle of the... | 05/10/2005 |
| 6868710 | Pinch grip dynamometer field testing calibration stand A pinch grip dynamometer field testing calibration stand for a pinch or finger grip dynamometer having a base defined by a platform and a vertical post, a dynamometer holder attached to the platform, and upper and lower calibration plates slidable on the post. The d... | 03/22/2005 |
| 6832503 | Machine for testing occupant restraint system The present invention relates to a weight-drop machine for calibrating and verifying the calibration of an occupant detection system in a vehicle. The machine comprises a lift frame that is adapted to support and lift a seat pallet toward a keeper plate to cause the... | 12/21/2004 |
| 6768226 | Electric circuit shielding A measuring circuit capable of performing a high-accuracy measurement by eliminating inductive influence from an ambient noise voltage source. An electric circuit including a signal circuit of high impedance, a wiring conductor and a meter is provided with a shieldi... | 07/27/2004 |
| 6698269 | Transducer in-situ testing apparatus and method The present invention provides an apparatus and method for in-situ testing of transducers, and more particularly to the testing of piezoelectric transducers including piezoelectric accelerometers. Circuits, measurement techniques, and interpretative algor... | 03/02/2004 |
| 6694796 | Device and method for introducing a known dust concentration spike for calibrating particulate matter continuous emission monitoring systems An apparatus for calibrating a particulate matter continuous emission monitoring system includes: a feed unit that supplies particulate matter of a known mass flow rate; an eductor unit connected with the feed unit that receives particulate matter therefr... | 02/24/2004 |
| 6580183 | Electric circuit shielding A measuring circuit capable of performing a high-accuracy measurement by eliminating inductive influence from an ambient noise voltage source. An electric circuit including a signal circuit of high impedance, a wiring conductor and a meter is provided wit... | 06/17/2003 |
| 6415242 | System for weighing fixed wing and rotary wing aircraft by the measurement of cross-axis forces Method and system for determining aircraft weight-related data. Strain sensors are affixed to aircraft support struts to generate signals related to strut strain. Tensioning apparatus applies known tension to the struts and computing apparatus calculates ... | 07/02/2002 |
| 5760289 | System for balancing loads on a thrust bearing of a gas turbine engine rotor and process for calibrating control therefor A process for periodically calibrating an algorithm in a control unit of a system for balancing loads on a thrust bearing of a gas turbine engine rotor is disclosed involving the steps of initializing a calibration of the control unit algorithm, causing t... | 06/02/1998 |
| 5533380 | Automatic force balance calibration system A system for automatically calibrating force balances is provided. The invention uses a reference balance aligned with the balance being calibrated to provide superior accuracy while minimizing the time required to complete the calibration. The reference ... | 07/09/1996 |
| 5492009 | Method and apparatus for testing a valve actuated by an electromagnet having an armature A method for testing a valve being driven by an electromagnet having a electromagnet armature, includes determining a value of current in the electromagnet as a response current, at an instant when motion of the electromagnet armature of the valve begins ... | 02/20/1996 |
| 5492020 | Detector for a physical quantity having a self-testing function A fixed substrate (10) having rigidity and a flexible substrate (20) having flexibility are arranged in such a manner that they are opposite to each other. Both the substrates are fixed at their peripheral portions by a detector casing (40). A working bod... | 02/20/1996 |
| 5404743 | Pulsed phase locked loop strain monitor A pulse phase locked loop system according to the present invention is described. A frequency generator such as a voltage controlled oscillator (VCO) generates an output signal and a reference signal having a frequency equal to that of the output signal. ... | 04/11/1995 |
| 5381687 | Escalator combplate stop switch load calibrating assembly An escalator combplate is equipped with a stop switch that will interrupt the power to the escalator when objects trapped between the stop treads and combplate impose a predetermined lifting force on the combplate. The necessary lifting force is determine... | 01/17/1995 |
| 5264797 | Device for detecting contaminants on conductive surfaces A device for detecting contaminants on a surface of a conductive test sample includes first and second probes for engaging contaminants on a test sample surface. The first and second probes are connectable to a device for measuring voltage drop and are di... | 11/23/1993 |
| 5195522 | Tonometry sensor calibration apparatus A calibration apparatus for use in calibrating a tissue stress sensor used in a blood pressure monitoring system. The calibration apparatus includes a calibration head which is adapted to be retained in close proximity to a tissue stress sensor. The calib... | 03/23/1993 |
| 4895750 | High-temperature tensile test specimen and methods of fabrication A carbon composite tensile test specimen for high temperature testing and a method of fabricating the same are disclosed. A plurality of holes are drilled in first and second end sections of the specimen and then the end sections are electroplated with ni... | 01/23/1990 |
| 4875674 | Energy absorbing means with self calibrating monitor The apparatus is adapted to an exercise device with an energy absorbing unit that has a self calibrating energy monitor. It comprises at least one rotating flywheel which is driven through a one way clutch. There is a braking mechanism to apply resistance... | 10/24/1989 |
| 4816729 | Closed loop machining system calibration This application deals with apparatus for calibrating an automated machining apparatus. The calibration apparatus comprises a tool probe and a system accuracy check gauge rigidly fixed to the workpiece loading mechanism of the machining apparatus. This ar... | 03/28/1989 |
| 4798094 | Hydrostatic primary force standard A controlled clearance piston load cell consisting of a piston and pressure acketed cylinder that has integral to its structure a system of hydrostatic bearings which provide centering of the piston in the cylinder and alignment of the piston-to-cylinder i... | 01/17/1989 |
| 4791815 | Cyclically driven gyro and adjusting system therefor A gyro which realizes a small error response to a disturbance inertia such as vibration, impact, etc. and an adjusting system thereof has a pair of mass elements which are cyclically driven symmetrically. A pair of sensors independently detect forces prod... | 12/20/1988 |
| 4770375 | Collective stick force-check device A device useful for verifying and setting the minimal resistive force setting of a collective stick in an aircraft using a collective stick is disclosed. The device is permanently attached to the collective stick and may be used by the pilot at any time. ... | 09/13/1988 |
| 4677860 | Yarn tension sensor A yarn tension sensor is disclosed which is adapted for use with a textile yarn processing machine. The sensor includes a spring arm which is contacted by a running yarn, and such that the tension in the yarn acts to deflect the arm. In order to render th... | 07/07/1987 |
| 4561285 | Thermally isolated calibration apparatus An apparatus for calibrating a force measuring instrument of the type that includes a force sensitive element submerged in a liquid. The apparatus comprises a magnetic object having a known weight when submerged in the liquid, and an electromagnet. The el... | 12/31/1985 |
| 4404839 | Testing device for force measuring apparatus To test the setting of safety ski bindings, a force testing device comprises a permanent magnet securable to a binding. The attractive force of the permanent magnet holds a soft iron plate comprising force engagement means on which the force producer of t... | 09/20/1983 |
| 4389711 | Touch sensitive tablet using force detection A tablet comprising conversion means to convert component forces at three fulcra of an external force applied to one point on a faceplate into electric signals, sensing means to sense that no external force is applied, memory means to store the output sig... | 06/21/1983 |
| 4383449 | Stress monitoring system The stress monitoring system includes a transducer assembly coupled to the member to be monitored for providing an electrical analog signal having an amplitude proportional to the stress forces imposed on the member and a polarity corresponding to whether... | 05/17/1983 |
| 4376386 | Torque wrench testing devices and the like Multiple range calibrating apparatus for checking the accuracy of torque wrenches and other force measuring instruments comprising a mechanism for applying torque to a torque receiving element connected between the instrument being checked and a force mea... | 03/15/1983 |
