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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7908928 | Monitoring system A monitoring system is provided, which may include a structural component configured to undergo mechanical loading and a wireless node attached to the structural component. The node may include a strain sensing device configured to measure strain experienced by the ... | 03/22/2011 |
| 7526965 | Method for evaluating burnishing element condition A method of evaluating the condition of a rolling burnishing element includes moving a burnishing element having an unknown condition against a surface in a preselected test pattern; while moving the burnishing element, recording at least one test force profile repr... | 05/05/2009 |
| 7353714 | Method and apparatus for automatic load testing using bi-directional testing The subject invention pertains to a method and apparatus for testing the static load-bearing capacity of a pile. In an embodiment, one or more load devices for applying a test load can be disposed within a pile such that a pile element can be above the load device, ... | 04/08/2008 |
| 7328625 | Systems and methods for determining fatigue life A method and method of estimating fatigue life of a structure is disclosed. In one embodiment, the method may include determining strain on the structure using a plurality of gauges positioned on the structure. The method may also include detecting a parameter of th... | 02/12/2008 |
| 7275446 | Apparatus for measuring the crushing strength of micron superabrasives A method and apparatus are provided for measuring the crushing strength of an abrasive, comprising particles, used in a lapping process. Embodiments include a crushing strength tester having a cup for holding the abrasive; a first motor for rotating the cup in a fir... | 10/02/2007 |
| 7246528 | Toner evaluation method, toner cartridge, and image forming apparatus A toner evaluation method that enables accurate evaluation of fixation performance of toner such as low temperature fixability and offset resistance, and a toner cartridge and an image forming apparatus adopting the toner positively evaluated by the evaluation metho... | 07/24/2007 |
| 7194317 | Fast plant test for model-based control A method and apparatus for designing perturbation signals to excite a number of input variables of a system, in order to test that system for the purpose of obtaining models for the synthesis of a model-based controller. The method begins with providing input parame... | 03/20/2007 |
| 6983660 | Fatigue measurement device and method An apparatus and method for measuring the fatigue strength and fatigue damage of structures and predicting the service life remaining in the structure being tested. The apparatus is a specially designed fatigue gauge that contains breakable ligaments of either varia... | 01/10/2006 |
| 6945097 | Characteristic strain and fracture resistance for scratch independently of indenter geometry The invention involves an apparatus and method for calculating characteristics of materials, such as equivalent strain, using an indenter where the method used is independent of indenter geometry. The method includes performing a scratch test to calculate the strain... | 09/20/2005 |
| 6821552 | Method and apparatus for determining the pass through flux of magnetic materials The invention includes an apparatus and method for determining the pass through flux of magnetic materials. The apparatus comprises one or more magnetic field sensors arranged in such a way as to collect field strength data in any or all the x, y, z directions. The ... | 11/23/2004 |
| 6647801 | Method, apparatus and support for testing poles A pole support for ground poles, such as telephone poles and power poles, is disclosed. The support can be driven into the ground next to the pole. It has a pair of spaced apart longitudinal end plates which are interconnected intermediate their ends by a... | 11/18/2003 |
| 6625566 | Pressure drop calculation method and system taking account of thermal effects The present invention relates to a method of calculating the pressure drops created by a given fluid in a circuit having a determined thermal profile. The method includes making up a database (BD) giving the rheology of various fluids at least according t... | 09/23/2003 |
| 6606918 | Multi-axial strain testing apparatus A strain testing apparatus which places tensile forces on a sheet, a film, or the like samples in at least two axes and generally in a radial direction. The multi-axial strain testing apparatus comprises a clamping assembly having at least two clamping me... | 08/19/2003 |
| 6311567 | Automatic static load testing for piles There is disclosed a method and apparatus for testing the static load-bearing capacity of a pile, wherein a test load is applied to the top of the pile (2) by way of a jack (1) braced against a reaction member (3) and the magnitude of the test load and th... | 11/06/2001 |
| 6205863 | Material testing machine having a control system for feedback-controlling the operation of a servo system A material testing machine includes a control system for feedback-controlling the operation of a servo system, including an actuator for applying a load to a test piece, during material testing. Prior to the material testing, the stiffness of the test pie... | 03/27/2001 |
| 6170337 | Method and device for measuring permanent length deformations of materials A method for measuring permanent length deformations in materials includes determining a change of an initial distance between two measuring points on the material surface. A first pair of impressions is formed on a portable impression body that correspon... | 01/09/2001 |
| 5913246 | Mechanical stress test machine The invention is a machine for the cyclic load testing in tension, compression, torsion, shear, or any combination thereof of any one of a number of different sizes, types and configurations of test specimens at a fixed or adjustable predetermined load an... | 06/15/1999 |
| 5531122 | Fatigue analysis and warning system In the field of large construction and mining equipment, significant frame stresses considerably shorten the expected operating life of a machine. This invention provides indications of significant frame stresses on machines having a ground engaging porti... | 07/02/1996 |
| 5511431 | Structure testing machine A structure testing machine for carrying out tests on a test structure (25) for an assessment of the response of the structure to test loads applied to the structure in the direction of a predetermined axis of the structure under the control of a monitore... | 04/30/1996 |
| 5351553 | High rate flywheel tensile testing apparatus for viscoelastic materials A flywheel tensile testing apparatus for viscoelastic materials is used for high-rate tensile testing to determine the mechanical properties such as the initial modulus, the stress-strain characteristics, energy at break, and void formation of energetic m... | 10/04/1994 |
| 4594900 | Axial load testing machine Disclosed is a testing machine for testing specimens such as lumber which may have varying overall lengths. The testing machine includes the frame having an elongated longitudinal member which can be pivotally mounted with respect to stands. Two sets of t... | 06/17/1986 |
| 4305300 | Railway car side frame test machine A railroad side frame test machine for loading side frames used on the trucks or carriages for railway cars to simulate the in-use loads utilizing a compact linkage that provides for direct loading of the specimen in the various load directions. The force... | 12/15/1981 |
| 4140008 | System for testing firmness A system for measuring or testing the firmness of a resilient object such as a mattress. A pressure applying platen or the like is driven by a motor into the object, and the pressure applied is measured through the utilization of a pressure sensitive tran... | 02/20/1979 |
| 4109516 | Cam plastometer A cam plastometer in which deformation compressive forces are applied to a specimen by a cam follower engaging a cam which is rotated by a hydraulic motor. By rotating the motor at a predetermined speed, and employing a particular profile of the cam perip... | 08/29/1978 |
| 4107981 | Method of estimating ground pressure A method of estimating ground pressure in rock samples by making use of the Kaiser effect of acoustic emission. The method comprises the steps of applying load to a rock sample, increasing the load and counting the summation of the acoustic emissions prod... | 08/22/1978 |
| 4081994 | Method of tension stress testing of rubber In a method of tension stress testing of rubber of the type wherein a rubber sample is elongated continuously at a predetermined speed and the tension stress is measured when the distance between a pair of reference positions set on the surface of the sam... | 04/04/1978 |
| 4075886 | Fracture toughness test method An improved method for testing fracture toughness of tungsten carbide, and more particularly sintered tungsten carbide, consists of preparing a specimen from a short rod of sample material by cutting thin longitudinal slots forming a V within the slotted ... | 02/28/1978 |
| 4074569 | Apparatus for determining material processing characteristics An apparatus for testing the processing behavior of a visco-elastic material. A first ram is adapted to apply to a test sample a predetermined pre-test deformation. A second ram is adapted to subsequently apply to the test sample an additional test deform... | 02/21/1978 |
| 4054050 | Apparatus for measuring the crush strength of solid particles An apparatus for accurately measuring the force required to crush pellets of solid material. A continuously increasing and accurately known crushing force is applied to the test particle by means of rolling cylindrical metal mass of precisely known weight... | 10/18/1977 |
| 3994157 | Pellet crushing strength tester An apparatus and a method is disclosed for determining the crushing strength of pellets of a powdered material by compressing individual pellets between one pellet-contacting face on a force-exerting means and another pellet-contacting face on a force-mea... | 11/30/1976 |
| 3992928 | Measuring the strength of a rock formation in situ Two hollow cylinders of rock are formed in the rock formation to be tested. A pressure ring is applied to the interior of one of the hollow cylinders of rock, and the ring is pressurized until the cylinder fractures, the highest value of the pressure bein... | 11/23/1976 |
| 3979948 | Apparatus for determining the dynamic complex hardness of resilient roll coverings Apparatus for determining the dynamic complex hardness of resilient roll coverings including a portable housing for positioning directly on the resilient roll covering to be tested. The portable housing includes an adjustable probe coupled to force and di... | 09/14/1976 |
| 3969928 | Non-destructive testing method for determining a body's mechanical properties and stresses The mechanical properties within a part are determined as a function of depth in a non-destructive manner by punching the body with a series of punches having different radii of curvature. Using a plastic criterion with the data obtained the elastic limit... | 07/20/1976 |
| 3948091 | Apparatus for determining the properties of metallic materials The apparatus includes a machine for subjecting a test-piece of superplastic material to a tensile test using a mobile member entraining one end of the test-piece and exerting traction on the test-piece. The mobile member is subjected to successive displa... | 04/06/1976 |
