Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 7735376 | Shaft torque profiling apparatuses and methods of use Embodiments of shaft torque profiling apparatuses and methods of use are generally described herein. In one embodiment, a method for determining the torsional stiffness of a least a portion of a shaft comprises: immobilizing a first portion of the shaft; immobilizin... | 06/15/2010 |
| 7231833 | Board deflection metrology using photoelectric amplifiers Manufacturers test printed circuit boards (PCB) to ensure that all components have been soldered to the correctly. Some tests cause the boards to deflect, which can damage component-to-board interfaces (i.e., solder joints) or components. Embodiments of the present ... | 06/19/2007 |
| 7213461 | Torsional shaker apparatus for inspecting rotatable power generation machinery Apparatus for applying torsional vibration to a rotating machine is provided. In one exemplary embodiment the apparatus includes a permanent magnet machine (12) connected to the rotating machine (22) and configured to generate a three-phase AC output v... | 05/08/2007 |
| 7181979 | Method and system for inspecting flexible device A system for inspecting a flexible device is provided, which is used for performing a performance inspection on a flexible device in a bending state, or after the flexible device has finished bending test so as to obtain a mechanical reliability. The inspecting syst... | 02/27/2007 |
| 7149673 | Method for estimating changes in product life for a redesigned product A method provides early estimation of product life using accelerated stress testing data. In an embodiment, data measured from a product operating in first, high-stress environment is used to predict how long the product will operate in a second, normal operating en... | 12/12/2006 |
| 7080565 | Dynamic load fixture for rotary mechanical systems A dynamic load fixture (DLF) for testing a unit under test (UUT) includes a lateral load system that applies a time-varying lateral load profile to the UUT drive shaft and an encoder that measures its angular rotation. An isolation stage suitably constrains the enco... | 07/25/2006 |
| 7024953 | Apparatus and method for tuning a golf shaft A method of making a golf club includes making a first determination of the location of the effective seam in a shaft and then more precisely locating the seam before attaching a golf club head with the face of the club head facing in a neutral direction. ... | 04/11/2006 |
| 6948377 | Method and apparatus for detecting the strain levels imposed on a circuit board A device for detecting strain levels imposed on a circuit board includes an apparatus mounted on the circuit board, an amplifier for detecting a change in the impedance of the apparatus and generating an output signal representing the change in the impedance of the ... | 09/27/2005 |
| 6905073 | Electronic card assembly and shell therefor An electronic card and the shell for the electronic card capable of exceeding applicable bending, torque, and fingernail test specifications are disclosed. The electronic card assembly can resist a bend of greater than 10° during a torque test applying a torque of ... | 06/14/2005 |
| 6718833 | Multiaxial high cycle fatigue test system A multiaxial high cycle fatigue test system for testing bending, torsion, and tension of a test unit, comprises servo-hydraulic components, including a hydraulic service manifold, two small high frequency actuators along a first axis, and one large main actuator alo... | 04/13/2004 |
| 6405595 | Apparatus for measuring torsional stiffness of a golf shaft An apparatus for determining the torsional stiffness of a shaft comprises a rigid frame having a collet for securing one end of the shaft to be measured the rigid frame. A second collet secures the opposite end of the shaft to an inertial weight, which is... | 06/18/2002 |
| 6298733 | Beam accelerometer An accelerometer includes a bottom leg, two side legs, a beam, two support strips, a mass, a loading column, and at least one resistor mounted on the beam. The two side legs extend upwardly from the bottom leg, and a lower end of each side leg is connecte... | 10/09/2001 |
| 6067860 | Circuit device integrity evaluation arrangement and method According to one aspect of the disclosure, the present invention provides methods and arrangements for testing the integrity of laminate and solder adhesion strength in circuit devices. Methods include securely mounting one end of a circuit device, and af... | 05/30/2000 |
| 5949682 | Heated circuit assembly tester and method A heated unit for testing circuit board assemblies. An insulated enclosure receives card assemblies to be tested through a door. A heater within the enclosure heats the card assemblies at a constant regulated temperature. A motor separately applies angula... | 09/07/1999 |
| 5838568 | Heated circuit assembly tester and method An apparatus and method provides a testing process and a machine for implementing a testing process to produce failures on a heated circuit card. The apparatus and method applies a controlled, repeatable shear stress to the joints between a circuit board ... | 11/17/1998 |
| 5789682 | Circuit board assembly torsion tester and method A mechanical deflection system (MDS) includes a torsion tester for circuit boards which imposes controlled repeatable sheer stress to a test board and components mounted thereon by cyclicly twisting the board about a center line. A self centering twisting... | 08/04/1998 |
| 5767415 | Method for non-destructive determination of fatigue limits and fracture toughness in components of various shapes A method for non-destructive determination of a fatigue limit for a component includes two sub-methods which may be performed separately, or in any order. A direct-deformation sub-method includes measuring micro-plastic deformation corresponding to each o... | 06/16/1998 |
| 5736646 | Circuit board assembly torsion tester and method A mechanical deflection system (MDS) includes a torsion tester for circuit boards which imposes controlled repeatable sheer stress to a test board and components mounted thereon by cyclicly twisting the board about a center line. A self centering twisting... | 04/07/1998 |
| 5731524 | Method and apparatus for measuring torsional rigidity of a shaft A method for measuring the torsional rigidity distribution of a shaft comprises the steps of; disposing a shaft to be measured in a vertical position in which the upper end thereof is immovably held and the lower end of the shaft is rotatable about the ax... | 03/24/1998 |
| 5567884 | Circuit board assembly torsion tester and method A torsion tester for circuit board assemblies (boards) clamps opposite edges of the board and cyclicly twists the board to provide substantially pure sheer stress in interconnection joints to SMT components for replicating failure modes due to thermal cyc... | 10/22/1996 |
| 5513536 | Pressure, force and torque measuring device A device for measuring a force, a pressure or a torque transmitted in a force path between first and second apparatus components, includes at least three mutually spaced piezo-resistive resistor elements disposed in the force path between the first and se... | 05/07/1996 |
| 5493913 | Power-impact or pulse screwing method A method for tightening a screw utilizes a power-impact or pulse driver. The prestressing force in the screw to be tightened is increased step-by-step during the tightening operation and evaluated. By detecting the prestressing force in the screw on a ste... | 02/27/1996 |
| 5460052 | Apparatus and method for measuring composite interface properties An apparatus and method for measuring interface properties of a composite test specimen includes a first jaw for gripping the specimen. The specimen has a fiber extending through a matrix forming a fiber-matrix interface with a portion of the fiber extend... | 10/24/1995 |
| 5038619 | Process and an apparatus for testing vehicle stabilizers A process and an apparatus for testing stabilizers (10) which are supported on stationary bearings (16, 17) upon a bench (32) and which are strained via a drive assembly by movement of one stabilizer leg (12) against the other stabilizer leg (13) includes... | 08/13/1991 |
| 4825692 | Apparatus for producing torsional vibrations An apparatus for producing predetermined torsional vibrations in a mechanical transmission is disclosed. The apparatus includes a summing gear arrangement including a non-revolving gear member such as of a planetary or differential gear assembly. The summ... | 05/02/1989 |
| 4283957 | Torsional exciter for a rotating structure An exciter is disclosed for applying a dynamic torsional force to a rotating structure, such as to the shaft of a turbine generator, the axle of a vehicle, or the like, during mechanical testing to determine the mechanical response characteristics, natura... | 08/18/1981 |
| 4074772 | Torquing tool control circuit The control circuit receives a signal from a torque measuring device provided on the tool and determines the proper shut off point for the tool. The circuit controls not only the tool shut off but also the rate of application of torque by employing a puls... | 02/21/1978 |
| 4019375 | Means for inducing vibration in an airfoil An apparatus for inducing vibratory oscillations in an airfoil is provided to simulate the dynamic aeroelastic interaction between the airfoil and a gas flow field. The apparatus includes first means for supporting the airfoil during inducement of the vib... | 04/26/1977 |
| 4003247 | Torsional oscillation apparatus In a torsional oscillation apparatus, for example for testing plastics, a lower clamp is arranged in torsionally-fast or non-rotating manner, for one end of a test specimen, and an upper clamp is provided for the other end of the test specimen. The upper ... | 01/18/1977 |
| 3945242 | Method of measuring dynamic characteristics of materials and device for effecting same The method of measuring dynamic characteristics of materials consists in obtaining, in the course of measurement, a control current which ensures oscillations of a specimen of a material at a preset amplitude and frequency. Then, real and imaginary compon... | 03/23/1976 |
