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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7966891 | Fatigue test apparatus for thin element of electronic device A fatigue test apparatus for thin workpiece includes a supporting module, a driving mechanism, a first connecting module, a second connecting module, a first holding post, a second holding post and a computer system. The first and second connecting modules are respe... | 06/28/2011 |
| 7926359 | Equipment and method to detect flexible devices A device and a method are provided for checking whether when an object has a sufficiently. The object to be examined extends in an object plane. A force exertion device exerts a force on the held object such that the force includes a force component at right angles ... | 04/19/2011 |
| 7591189 | Glass testing apparatus Embodiments of the present invention provide methods and apparatuses for testing the structural integrity of glass. Embodiments of the present invention provide a method and apparatus for testing glass by applying one or more stresses to the glass in a controlled ma... | 09/22/2009 |
| 7225681 | Statistical method for identifying microcracks in insulators One embodiment of the invention is a method for evaluating a material such as low-k dielectric, by a stress-generating test tool such as a needle. The evaluation object is shaped as a stack of adhering layers: low-k dielectric, first metal (preferably copper), barri... | 06/05/2007 |
| 7201064 | Panel bending machine A panel testing device, and a method of its use, for flexing and measuring mechanical properties of a panel are provided comprising a panel bending assembly operable to engage a panel and impart a bending force on the engaged panel, and a linear actuator having an o... | 04/10/2007 |
| 7194916 | Apparatus and method for testing stiffness of articles An apparatus for testing stiffness characteristics such as modulus of elasticity E of an article such as a piece of lumber moving in a conveying direction transverse to the testing axis, comprises a bearing unit capable of contacting the piece of lumber at two space... | 03/27/2007 |
| 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 |
| 7089802 | Method and apparatus for determining hydrogen embrittlement A method and apparatus for determining failure of a test component. The apparatus, according to a selected method, is able to determine the embrittlement potential of a selected procedure for a selected material. The apparatus is able to determine the embrittlement ... | 08/15/2006 |
| 7047156 | Method for estimating compliance at points along a beam from bending measurements The inherent smoothing in bending stiffness measurement of wood boards as occurs in the machine grading of lumber can mask the effect of knots and other local characteristics affecting structural value. Improved estimates of local (pointwise) stiffness will be usefu... | 05/16/2006 |
| 6988417 | Displacement and force sensor An apparatus for measuring the displacement of visco-elastoplastic media below a surface thereof comprises an upper plate mounted such that a displacement force exerted on the top surface thereof will move the upper plate a displacement distance downward toward a ba... | 01/24/2006 |
| 6941631 | Optical component plastic deformation control process A process for aligning an optical component by plastic deformation comprises finding a desired position of an optical axis of the optical component relative to a rest position of the optical axis of the optical component. Then, a deformation force is exerted, which ... | 09/13/2005 |
| 6931942 | Panel bending and testing device A panel testing device includes a frame, a first roller assembly pivotally mounted to the frame including a first roller and a second roller spaced apart from and substantially parallel to the first roller. The panel testing device also includes a second roller asse... | 08/23/2005 |
| 6619137 | Plate thickness inspecting apparatus In a system for inspection of wood-board thickness, displacement sensors (2(21U, 22U, 23U, 21L, 22L, 23L)) are disposed at three positions with respect to a width of a wood material (1) being conveyed thereto for measurement of the thickness thereof. A pr... | 09/16/2003 |
| 6413275 | Apparatus for testing bioprosthetic heart valve leaflets Heart valve leaflet selection methods and apparatuses which subject individual leaflets to loads and measure the resulting deflection to more reliably group leaflets of similar physical characteristics for later assembly in prosthetic heart valves. The de... | 07/02/2002 |
| 6053052 | Panel performance test system The invention is a performance testing system for wood-based panels. The testing includes performance of a material under a load concentrated in a single area, performance of edge support systems under a concentrated load and performance of a material und... | 04/25/2000 |
| 5804738 | Method and apparatus for on-line testing of the stiffness or strength of panels and especially of wood panels A method and apparatus for testing the stiffness or strength of wood panels while the panels are moving along a production line, in which the panels are moved lengthwise through a tester having lower rollers which are situated to support side or end margi... | 09/08/1998 |
| 5699274 | Panel performance test system The invention is a performance testing system, i.e., performance of a material under a load concentrated in a single area. The system is computerized and automatically applies a load to a panel to be tested, reads and records deflection of the panel witho... | 12/16/1997 |
| 5583298 | Method and apparatus for on-line testing of pultruded stock material The invention is directed to a method and apparatus for testing the quality f pultruded material by measuring a load applied to the material as it is being pultruded and measuring the load associated with a fixed displacement of the pultruded stock materia... | 12/10/1996 |
| 5503024 | Apparatus for testing lumber stiffness Improved apparatus is described for measuring bending stiffness of dimension lumber. Innovative details are introduced that make the measurement more accurate and repeatable as well as making the apparatus simpler, more robust and easier to maintain than ... | 04/02/1996 |
| 5431061 | Deflection testing fixture assembly and methods of testing A testing fixture for investigating the effects of pressure loadings on marine hull and other plate panels in a testing machine includes a liquid-filled bladder adapted to be received on the machine platen, a fixture supported by the machine frame incorpo... | 07/11/1995 |
| 5231882 | Testing device for performing four-point fatigue strength tests under alternating bending stresses A testing device is provided for performing four-point fatigue strength tests of a sample by applying alternating bending stresses to the sample. The device includes four rotary joints. Each rotary joint includes a pair of individual, spaced-apart rollers... | 08/03/1993 |
| 5187987 | Bending beam creep test device with piston having a gas bearing Apparatus is disclosed for measuring creep stiffness of a specimen, for example, asphalt cement, or other viscoelastic material, having a flexural modulus greater than approximately 1,000 psi. The specimen and the lower part of a loading mechanism are sub... | 02/23/1993 |
| 5138878 | Fiber orientation sensor A sensor for detecting directional variations in a physical characteristic of a moving sheet of material is disclosed. The sensor has a support for supporting the moving sheet. The support defines an open region into which the moving sheet is deflected by... | 08/18/1992 |
| 5127271 | Method of non-destructive inspection for resinous automotive bumper beams A method of non-destructive inspection for resinous automotive bumper beams provides for applying a flexural load to the center of a bumper beam by a pressing jig in a state where both ends of the bumper beam have been pivotably supported to gradually ben... | 07/07/1992 |
| 5101661 | Fiber orientation sensor A sensor for detecting directional variations in a physical characteristic of a moving sheet of material is disclosed. The sensor has a support for supporting the moving sheet. The support defines an open region into which the moving sheet is deflected by... | 04/07/1992 |
| 4991446 | Force measurement with compensation of errors caused by accelerations of measuring apparatus A method and apparatus for compensating for errors in the measurement of force applied to a load beam interposed between two compliant supports and a load point involves placement of an accelerometer at a selected location on the load beam. Signals produc... | 02/12/1991 |
| 4991432 | Sensor and system for continuous determination of sheet characteristics A sensor for sensing a quality of a sheet, such as a paper sheet, related to elastic modulus and bending stiffness as it is being made including a sheet support in the form of a ring and a free running wheel, which depresses the paper into the center of t... | 02/12/1991 |
| 4986132 | Fully articulated four-point-bend loading fixture A fully articulated four-point-bend loading fixture for MOR and fracture toughness specimens utilizes an upper loading plate in combination with a lower loading plate. The lower plate has a pair of spring loaded ball bearings which seat in V-shaped groove... | 01/22/1991 |
| 4976152 | 3 point bending measuring system A sample holder for use with a bending measuring system. A probe shaft is disposed in an elongated tube. A probe tip is removeably mounted at one end of the probe shaft. The other end of the probe shaft is adapted to be fixed to the bending measuring syst... | 12/11/1990 |
| 4932267 | Flexure coupling A flexure coupling includes a backing plate and an adjacent hub, the backing plate being adapted to be mounted to a first machine member and the hub being adapted to be mounted to a second machine member. The hub is supported on the backing plate by a plu... | 06/12/1990 |
| 4875376 | Guided-bend test apparatus A self-contained apparatus for testing the ductility of a weld located within an elongated specimen having means for raising and lowering a ram over the specimen. The apparatus includes a pair of legs, each having a pair of spaced-apart rails for supporti... | 10/24/1989 |
| 4852029 | Automated material classification apparatus and method An automated method and apparatus for grading pre-cut lumber products according to selected physical properties thereof such as modulus of elasticity (MOE) and modulus of rupture (MOR) are disclosed. A conveyor transports boards to be graded to an automat... | 07/25/1989 |
| 4807465 | Apparatus for measuring capsule plug, granule and pellet hardness Apparatus for measuring the hardness of capsule plugs, granules and pellets, in which a power stand (11) has a base (12) and gear motor (15) for driving a replaceable probe (25) toward a test subject supported on the base. A test subject holder (27) is pl... | 02/28/1989 |
| 4763529 | In-situ beta alumina stress simulator Method and apparatus for static fatigue testing of ceramic material is described wherein a thin plate of ceramic material is supported at opposite ends thereof in a liquid sodium bath inside an enclosure containing a gaseous atmosphere inert to reaction w... | 08/16/1988 |
| 4747314 | Racket tester A racket tester includes a flat plate, a support, a knob attached with a screw rod, an pneumatic cylinder including a piston and a pressure gauge, a base, a ring, an indicia marking, a round rod, a stand, and a weighing unit. By properly associating the a... | 05/31/1988 |
| 4730498 | Fixture for holding a bending test specimen A test fixture for use in measuring the forces required to bend a test specimen throughout a range of temperatures includes clamps for gripping the ends of the test specimen while bending forces are applied intermediate the ends of the specimen, the clamp... | 03/15/1988 |
| 4708020 | Temperature compensating continuous panel tester An apparatus and process for testing a panel for strength and stiffness has the ability to handle panels of different thicknesses, and also has a temperature sensor so that panels can be tested hot and the cold end use strength and stiffness correlated. T... | 11/24/1987 |
| 4667512 | Normal force transducer for receptacle contact Apparatus for measuring the normal force exerted on a pin by a receptacle contact comprises a pair of beams profiled as the pin and having inward facing deflecting surfaces defining a central space. A thin film integrated circuit bonded to one of the beam... | 05/26/1987 |
| 4589288 | Static bending apparatus for grading wood panels A non-destructive method and apparatus is provided for testing a wood panel, such as a sheet of plywood, to establish values which may be used in calculating a measure of the modulus of elasticity (MOE) for the panel. The invention involves supporting the... | 05/20/1986 |
| 4583407 | Method for accelerating the failure of coatings A method of accelerating tests for the delayed failure of coatings and coated substrates caused by degradation is provided wherein the coated substrate is subjected to a controlled level of strain during testing.... | 04/22/1986 |
