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| Number | Title | Issue Date |
| 7347003 | Device to measure axial displacement in a borehole A device to measure minute displacement in rocks, including anchor deployment means, anchor registration means, and frame release means. Further including anchor units comprising a fixed anchor point, a reversible anchor actuator and a deployable anchor face capable... | 03/25/2008 |
| 7348502 | Counterbalance for a platform balance A platform balance includes a first frame support and a second frame support movable relative to the first frame support. At least one counter balance assembly is provided to support the static weight of the first frames support and elements connected thereto. The c... | 03/25/2008 |
| 6907677 | Stable LVDT extensometer A new extensometer is disclosed that avoids prior art problems of drift and other problems from variations in temperature, humidity and other environmental factors. Two primary extensometer body parts each hold at one end specimen contact rods and at their other end... | 06/21/2005 |
| 5819428 | Extensometer structure An extensometer structure for an extensometer comprises a flexure assembly, a first extension arm and a second extension arm. The flexure assembly includes a first flexure defining a first plane and a second flexure defining a second plane. The second fle... | 10/13/1998 |
| 5623768 | Method for determining an extension of an object by means of an extensometer and extensometer for performing the method A method for determining an extension of an object with an extensometer, and an extensometer for performing the method, include two legs being movable in a spreading plane and each having one end connected to a joint and another end connected to the objec... | 04/29/1997 |
| 5600895 | Extensometer An extensometer measures strain on a test specimen subjected to tensile, compression or fatigue tests. The extensometer has a pair of members that are connected together preferably with at least two spaced-apart flexible plates. The members are coupled to... | 02/11/1997 |
| 5463902 | Soft tissue extensometer An extensometer for measuring strain in a test specimen is disclosed. The extensometer includes a frame and a flexible support structure, preferably, a loop, mounted to the frame. A measuring device is mounted to the flexible support loop at a position sp... | 11/07/1995 |
| 5454174 | Position setting device and securing arrangement for an extensometer An extensometer includes a first element and second element to be set at a predetermined distance apart, with a coupling for setting and holding the two elements at the predetermined distance apart. The coupling is movable by the action of a biasing force... | 10/03/1995 |
| 5361640 | Materials testing apparatus for reduced sample bending A material testing apparatus is shown that uses one free swiveling alignment coupling and one alignment coupling which can be used in a free swiveling mode or a fixed alignment mode. These couplings and an alignment extensiometer are used to reduce sample... | 11/08/1994 |
| 5316118 | Device for obtaining mechanical characteristic of coins A device and procedure for obtaining the mechanical characteristics of coins includes an element onto which coins pass which element is elastically deformable under the weight of the coins. This elastically deformable element has sensors to detect an elec... | 05/31/1994 |
| 5275057 | Clip gage attachment for frictionless measurement of displacement during high-temperature mechanical testing An attachment for placement between a test specimen and a remote clip gage extensometer providing improved fracture toughness tests of materials at elevated temperature. Using a cylindrical tube and axial rod in new relationship, the device transfers the ... | 01/04/1994 |
| 5161891 | Process for determining and controlling railroad rail's neutral temperature to prevent track buckling and rail fractures In order to determine a rail's neutral temperature, the length of an unconstrained piece of steel (or "gage") is compared with a similar length of railroad track rail which is constrained and thereby deflected at most temperatures because of the track str... | 11/10/1992 |
| 5123175 | Horizontal extensometer Disclosed is a horizontal extensometer for measuring strain on specimens in cryogenic to elevated temperatures with zero frictional and activation forces. The extensometer has first and second elongate hollow arms which are adapted to pivot in relation to... | 06/23/1992 |
| 5119569 | Multiple gage length extensometer An extensometer for measuring strain in a specimen on which the extensometer is mounted which has two arms joined together at first ends, and with specimen engaging knife edges at the second ends. The knife edges will engage a specimen at spaced locations... | 06/09/1992 |
| 5099700 | Extensometric sensor for measuring the stresses acting on a drilling element and a device for mounting such a sensor An extensometric sensor for measuring stresses acting on a drilling element at a bottom of a well, with the sensor including a first measurement zone formed from at least two traction blades, on which are mounted measurement gauges, connected at their end... | 03/31/1992 |
| 5083465 | Probe for an extensometer Disclosed herein are probes for mounting on an extensometer used in conjunction with a materials testing machine, and can be used in high temperature applications. Each probe includes a probe shaft with a tip and a probe support body mounted to a hollow s... | 01/28/1992 |
| 4831738 | Capacitive extensometer A capacitive extensometer utilizes an extensometer frame having 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 teste... | 05/23/1989 |
| 4819340 | Compact focal plane precision positioning device and method Method of precisely positioning a first terminal portion of an elongated tensile rod with respect to a base member coupled to a second terminal portion of the tensile rod which has a threaded portion, involves providing an electrical strain gage measureme... | 04/11/1989 |
| 4706387 | Device for measuring hole elongation in a bolted joint A device to determine the operable failure mode of mechanically fastened lightweight composite joints by measuring the hole elongation of a bolted joint is disclosed. The double-lap joint test apparatus 10 comprises a stud 20, a test specimen 30 having a ... | 11/17/1987 |
| 4507871 | Quick attach retainer for extensometer A quick attach spring retainer holds an extensometer arm onto a test specimen under a resilient load using a unitary spring that is quickly placed onto an extensometer, and which has low mass to minimize any effects on dynamic testing. The spring force is... | 04/02/1985 |
| 4491021 | Axial-torsional extensometer An extensometer assembly accurately measures axial strain, torsional strain and various combinations of these strains in a specimen on which the extensometer assembly is mounted. The torsional strain measurement is made by measuring angular displacement p... | 01/01/1985 |
| 4251918 | Extensometer A strain gage extensometer used for measuring uniaxial and biaxial strains in material test specimens. The extensometer is composed of two independent axial strain measuring sensors joined together by a resilient member which is instrumented to provide tr... | 02/24/1981 |
| 4137759 | Belt tension indicating apparatus An apparatus is disclosed for measuring the tension in a belt. The preferred embodiment incorporates a housing which is adapted to be momentarily attached to a belt. As the belt tension is varied, the device indicates the change in tension. This is achiev... | 02/06/1979 |
| 4010641 | Apparatus for measuring the stiffness characteristic of structural adhesives An apparatus for measuring the stiffness characteristic of structural adhesives which encompasses a critically patterned series of sensor points which functions cooperatively with a novel mounting mechanism to enable the recording of minute movements of a... | 03/08/1977 |
