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 |
| 7877893 | Measurement of micromovements A micromovement measuring device has a first element such as a probe tip or flat plate coupled to a test body (107) the movement of which is to be measured. A second element (104) is located adjacent to the first element, to form a gap (108) the... | 02/01/2011 |
| 7774952 | Measurement of micromovements A micromovement measuring device has a first element such as a probe tip or flat plate coupled to a test body (107) the movement of which is to be measured. A second element (104) is located adjacent to the first element, to form a gap (108) the... | 08/17/2010 |
| 7340961 | Fixture and method for measuring elongation A fixture for measuring the elongation of a specimen includes a base. The base carries a fixture portion, and the fixture portion is provided with a surface adapted to receive a portion of the specimen. ... | 03/11/2008 |
| 5115680 | Displacement sensor with mechanical preamplification means A device for measuring physical variables comprises a pair of thin planar members disposed symmetrically in a face-to-face arrangement about a plane including a reference axis defining the direction of displacement of a target object mechanically coupled ... | 05/26/1992 |
| 4936150 | Strain follower A Strain Follower comprises cantilevered beams mounted by gripping means on opposite sides of an object to be loaded, which beams are deflected in relationship to the deformation of the object by axial forces, and strain gages mounted on the beams and ele... | 06/26/1990 |
| 4930228 | Stem load determining system A stem load determining system comprises a method and apparatus for determining the load developed on a threaded stem, including a valve stem driven by a valve operator. An integral component of the apparatus is a stem strain transducer uniquely designed ... | 06/05/1990 |
| 4850116 | Electronic tattle tale An electronic indicator comprising a first portion attached at one end to an object to be controllably stretched or elongated and a second portion slideably connected to the first portion for relative movement therewith and connected at one end remote fro... | 07/25/1989 |
| 4841226 | Capacitive extensometer with curved target surface A capacitive extensometer has an extensometer frame formed of a pair of arms connected together about a hinge axis at first remote ends, and having second ends which include specimen contacting members for engaging the surfaces of a specimen to be tested.... | 06/20/1989 |
| 4538669 | Distortion measurement in casting Apparatus and method is disclosed for on-line monitoring for early detection of diagonal distortion in a moving cast product ideally having a rectangular cross-section. A pair of contact rollers is supported on respective guide arms at a location along th... | 09/03/1985 |
| 4294015 | Extensometer An extensometer for detecting traumatized ligaments where the elongation of the ligament is either abnormally large or abnormally small compared to the elongation measured on a healthy ligament for an angle of flexion of the knee. The extensometer include... | 10/13/1981 |
| 4232446 | Gage for measuring decrease in dimension of test specimen in tensile test A test gage for measuring the decrease in one dimension of a test specimen having a frame member with a sliding member positioned within the frame member. The test apparatus is adapted to receive a test specimen between the sliding member and one side of ... | 11/11/1980 |
| 4160325 | Extensometer An extensometer capable of simultaneous measurement of axial strain and torsional deflection of a specimen subjected to axial or torsional load. A pair of gauge members define reference plane surfaces, one extending parallel and another extending perpendi... | 07/10/1979 |
| 4098000 | Crack opening displacement gage An electrical transducer for measuring changes in the size of crack openings. The device is designed to operate at temperatures up to and exceeding 1500° F., is portable, compact, easy to use and reuseable. The device comprises a differential capacitive ... | 07/04/1978 |
| 3974686 | Extensometer for tensile tester The extensometer has first and second gripping portions on spaced members designed to be applied to a specimen by using only one hand. Changes in the length of the specimen are indicated by an electrical signal derived from a flexure strain gage arrangeme... | 08/17/1976 |
