Abstract: This disclosure relates to flexible display screen testing technology. A bending test device for a flexible display panel is provided. The bending test device includes a first bracket, a second bracket disposed in parallel to a side of the first bracket, and at least two first carriers laminated between the first bracket and the second bracket. Each of the first carriers is configured for bending and carrying a flexible display panel. The bending test for a plurality of flexible display panels can be simultaneously performed by laminating the first carrier.

Abstract: Provided is a deformation tester where a specimen is deformed and can be observed and analyzed in any deformation state without removal. The tester includes: a detachable part repeating a relative displacement cycle, two portions of the specimen attached to a first and a second attachment portion of a first and a second part member, the specimen deformed from a first to a second shape state and back to the first shape state during the cycle; and a main body part that the detachable part is detachably attached to; wherein a state retaining part for fixing a relative position of the second to the first part member in at least one shape state is freely attachable to the detachable part mounted on the main body part and the detachable part with the state retaining part is freely attachable to the main body part.

Abstract: An evaluating device of a flexural property includes a holder, a body disposed on the holder and capable of being moved along with a length of direction of the holder, a clamp coupled to the body to be rotated on the body and fixing a first side of the specimen to be evaluated, and a pressing part disposed over the clamp and pressing a second side of the specimen opposite to the first side and disposed upper than the first side of the specimen to bend the specimen, and an evaluation method of a flexural property of the bent specimen using the same.

Abstract: A fixture facilitates using a linear force of a uni-axial test machine to subject a test sample to bending forces. The test machine includes a frame and a crosshead. To generate the linear force, the crosshead translates with reference to the frame in a plane of motion. The fixture includes an upper connecting link, a lower connecting link, and two transverse arms. The upper connecting link is configured to attach to the crosshead for receiving the linear force, and the lower connecting link is configured to attach to the frame. The two transverse arms are pivotably carried between the upper and lower links. Each transverse arm has an inner end configured to attach to the test sample, the test sample being suspended between the arms. The transverse arms pivot in opposite directions in response to the linear force applied to the upper connecting link, exposing the sample to bending forces.

Abstract: 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 assembly pivotally mounted to the frame having a third roller and a fourth roller spaced apart from and substantially parallel to the third roller. The device is configured such that the first and third rollers may be engaged with a first side of a test panel and the second and fourth rollers may be engaged with a second side of the test panel. The first and second roller assemblies are pivoted in opposing directions to bend the panel. A LASER displacement sensor is mounted on a movable manipulator measures the deflection of the panel as the panel is bent.

Abstract: The invention relates to a measuring sensor (1) for measuring positive and negative elongations on cylindrical or profiled bodies (6). The measuring sensor (1) consists of more than two parts and is essentially annular and has at least one tensioning element (7, 15). Two segments (2, 3) that can be tensioned are provided with a recess on the longitudinal center on the internal contour (22), the recess being disposed opposite the direction of tensioning (S) and accommodating a protruding elastic element (8) with a measuring element (10). The recesses can be pressed non-positively onto the surface of the body (6). The segments (2, 3) of the multi-part measuring sensor (1) that are diagonally opposite can be tensioned with their both ends by means of exchangeable and/or adjustable lateral guide members (4, 5, 26, 38) for the body to be measured (6).

Abstract: 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 base. Guides maintain the upper plate and the base in alignment such that movement is along a displacement axis. A calibrated bias element exerts a calibrated bias force resisting movement of the upper plate toward the base. A displacement measuring device measures the displacement distance, and is operative to generate a movement signal corresponding to the displacement distance. A data acquisition system is operative to receive and record the movement signal, and calculate the displacement force exerted on the top surface of the upper plate required to move the upper plate the displacement distance against the calibrated bias force.

Abstract: 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 assembly pivotally mounted to the frame having a third roller and a fourth roller spaced apart from and substantially parallel to the third roller. The device is configured such that the first and third rollers may be engaged with a first side of a test panel and the second and fourth rollers may be engaged with a second side of the test panel. The first and second roller assemblies are pivoted in opposing directions to bend the panel. A deflection sensor mounted on a movable manipulator measures the deflection of the panel as the panel is bent.

Abstract: A system for measuring the weight of a seat occupant is used to control airbag deployment. The system includes a plurality of weight sensors that have a first end mounted to a seat riser and a second end mounted to a seat frame or track member. The weight sensors have a central bendable portion that extends between the first and second ends. A groove is formed in one of the external surfaces of the central bendable portion to localize strain. A full bridge strain gage assembly is mounted on a surface of each of the weight sensors, opposite from the groove, for generating a weight signal in response to measuring deflection of the central bendable portion. A central processor determines seat occupant weight based on the weight signals and an airbag control module communicates with the processor. The control module controls deployment force of the airbag based on seat occupant weight.

Abstract: 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 members, and a sample securing portion arranged in a substantially radial manner about a point. The multi-axial strain testing apparatus can advantageously be employed to test crack growth propagation and flex fatigue in rubber polymer and elastomer samples.

Abstract: A system for measuring the weight of a seat occupant is used to control airbag deployment. The system includes a plurality of weight sensors that have a first end mounted to a seat riser and a second end mounted to a seat frame or track member. The weight sensors have a central bendable portion that extends between the first and second ends. A groove is formed in one of the external surfaces of the central bendable portion to localize strain. A full bridge strain gage assembly is mounted on a surface of each of the weight sensors, opposite from the groove, for generating a weight signal in response to measuring deflection of the central bendable portion. A central processor determines seat occupant weight based on the weight signals and an airbag control module communicates with the processor. The control module controls deployment force of the airbag based on seat occupant weight.

Abstract: A wafer testing rig includes a stand, a first contact component, a second contact component and a biasing device. The first contact component is mounted to the stand. The second contact component is mounted to the stand for movement towards and away from the first contact component. The first and second contact components are shaped so that a wafer, when located between the contact components, is deflected into a dome shape when the second contact component is moved towards the first contact component. The biasing device is operable to move the second contact component towards and away from the first contact component. An electrical tester is provided to test the wafer.

Abstract: A system for simultaneously measuring strains in a test member includes spatial-position members which are coupled to different portions of the test member and first and second displacement sensors which are spaced apart by a sensor space and coupled to the spatial-position members. Linear and bending deformations of the test member are calculated as functions of the responses of the displacement sensors and of the sensor space.

Abstract: A device for measuring the natural bending strength of a sheet material, and for measuring the bending strength of a creased or scored portion of the sheet material, and for dynamically analyzing such test results. The device has a rotatable clamp, a load sensor, a data processing unit, and a data displaying unit. The load sensor is positioned to directly contact the sheet material being held by the clamp. The clamp and sheet material can be rotated so that the sheet material presses against the load sensor, and the data processing unit will then determine the resistance force detected by the load sensor and will determine the amount of rotation associated with that force, and the resulting data are then processed, stored, and can be displayed as output data in a predetermined form.

Abstract: A golf club shaft blank is clamped at its butt end and deformed at its tip end to establish the longitudinal deformation characteristics of the shaft blank. The shaft is repositioned relative to the clamp and then reclamped at a new location which, when deformed, has the desired longitudinal deformation characteristics. The shaft is sawed to the desired length by removing material from the butt end and the tip end of the shaft.

Abstract: A system for simultaneously measuring strains in a test member includes spatial-position members which are coupled to different portions of the test member and first and second displacement sensors which are spaced apart by a sensor space and coupled to the spatial-position members. Linear and bending deformations of the test member are calculated as functions of the responses of the displacement sensors and of the sensor space.

Abstract: A new apparatus and method for applying a biaxial load to a flat plate test specimen is disclosed. A rhombus-shaped four-bar linkage is attached at one vertex to a fixed attachment point and a uniaxial tensile force is applied to the opposite vertex. The test specimen is placed inside the four-bar linkage and is attached to the four bar linkage by load transfer members connected at one end to the links of the four bar linkage and at their other end to grips holding the test specimen. In one embodiment, load transfer members parallel to the applied uniaxial tensile force are attached to test specimen grips adjacent to the link attachment points of the load transfer members and perpendicular load transfer members are attached to test specimen grips opposite their link attachment points. Application of the uniaxial tensile force then produces a biaxial tensile force in the test specimen.

Abstract: A portable device for measuring the shear properties of compacted asphalt mixes under applied dynamic loading conditions. The device includes first and second material retaining members which form a material receiving pocket for containing the compacted asphalt mix. The first and second material retaining members are connected via flexure assemblies which allow movement of the first and second material retaining members only along the longitudinal axis of the compacted asphalt mix. A dynamic load is applied to the flexures, thereby creating a shear condition parallel to the longitudinal axis of the compacted mix. The temperature of the asphalt mix may be held constant by controlling the temperature within an environmental chamber through the use of a closed loop PID control system.The specimen is dynamically loaded by a dynamic loading frame consisting of a servo pneumatic actuator and load reaction structure. A microprocessor-based controller operates the dynamic loading frame under closed loop control.

Abstract: Bending movement of a cylinder in a rotary printing press is measured by using a bending rod that is connected to the cylinder journal at one end and to a lateral register adjustment device at its other end. The bending rod is acted on by the bending forces applied to the cylinder and carries strain gauges that detect the bending of the bending rod. A double jointed coupling is used to connect the lateral register adjusting device to the cylinder journal. The bending rod is situated within this double jointed coupling.

Abstract: A rising step-load test apparatus for subjecting the notched region of a fracture specimen to tension by applying four-point bending to the specimen, and having an adaptor that can fit into the test apparatus in four-point bending and convert the bending load to an axial tensile load on a second specimen for which the adaptor serves as a fixture. The test apparatus applies four-point bending to either the fracture specimen or the adaptor through two oppositely situated simple supports at one end of the fracture specimen or adaptor and two other oppositely situated simple supports at the other end of the fracture specimen or adaptor. The adaptor employs two pivotally attached linking members attached to the two ends of the second specimen to transfer a pure axial tension to the second specimen for testing in axial-tension mode. A chemical bath is provided for an accelerated test of hydrogen embrittlement.

Abstract: A rising step-load test apparatus for subjecting the notched region of a fracture specimen to tension by applying four-point bending to the specimen, and having an adaptor that can fit into the test apparatus in four-point bending and convert the bending load to an axial tensile load on a second specimen for which the adaptor serves as a fixture. The test apparatus applies four-point bending to either the fracture specimen or the adaptor through two oppositely situated simple supports at one end of the fracture specimen or adaptor and two other oppositely situated simple supports at the other end of the fracture specimen or adaptor. The adaptor employs two pivotally attached linking members attached to the two ends of the second specimen to transfer a pure axial tension to the second specimen for testing in axial-tension mode. A chemical bath is provided for an accelerated test of hydrogen embrittlement.

Abstract: A deflection technique utilizing an electronic force gauge to match the flexibility of a set of golf clubs consisting of a bracket at one end of a rectangular backboard which holds the butt end of the shaft to be measured, a movable bracket at the other end of the backboard to which a horizontal bar is attached against which the tip end of said shaft is held, and a bracket attached to an electronic force gauge mounted between the two aforementioned brackets with said gauge measuring the shaft's resistance to pressure when the tip end of the shaft is manipulated downward.

Abstract: A rising step-load test apparatus for subjecting the notched region of a fracture specimen to tension by applying four-point bending to the specimen, and having an adaptor that can fit into the test apparatus in four-point bending and convert the bending load to an axial tensile load on a second specimen for which the adaptor serves as a fixture. The test apparatus applies four-point bending to either the fracture specimen or the adaptor through two oppositely situated simple supports at one end of the fracture specimen or adaptor and two other oppositely situated simple supports at the other end of the fracture specimen or adaptor. The adaptor employs two pivotally attached linking members attached to the two ends of the second specimen to transfer a pure axial tension to the second specimen for testing in axial-tension mode. A chemical bath is provided for an accelerated test of hydrogen embrittlement.

Abstract: A torsional tester includes test stations for one or more circuit cards. In each test station, one end of the circuit card under test is held stationary while the opposite end is twisted in a card holder mounted to pivot about an axis, being alternately driven by each of a pair of weights extending downward on a flexible member from opposite sides of a pulley. A rocker providing a platform extending under each of these weights is driven in a reciprocating pivoting motion in which the weights are alternately lifted and allowed to fall. The weight which is allowed to fall provides a torque to the pulley, while the weight being lifted does not provide such a torque. A pair of setscrews limits the angular motion of the card holder to a predetermined level in each direction.

Abstract: This invention relates to an apparatus and method for measuring the peel strength of a paper joint which is adhesively bonded. Such structures of this type, generally, allow the peel strength of the adhesively bonded joint to be accurately and repeatably measured in an inexpensive manner.

Abstract: 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 bending. First and second pull rods (4,8) removably connected to the alignment couplings (5,9) are at opposite ends thereof removably coupled to the sample (1) being tested via sample couplings (3,7).

Abstract: A device for low temperature bend-testing of a test piece is disclosed. The device of the present invention comprises fixed and movable units. The fixed unit includes a base which includes at least one substantially vertical stanchion. A tank for holding a volume of low temperature liquid, such as liquid nitrogen, is secured to the base. The movable unit includes a support and a pin. The support structure includes an arch portion and at least one projection. The test piece under test is supported by supports included in the arch portion. The pin is slidably mounted in the structure so as to be displaceable in a direction perpendicular to the test piece when supported by the supports. The device also includes means making the fixed and movable units operable together to permit the test piece to be bend-tested in the tank.

Abstract: An economical, corrosion-resistant, wireline set and retrievable, downhole coupon holder is disclosed that has a non-metallic, elongated member having recessed slots and a mounting means for mounting the coupons within the recessed slots. Preferably, there are six pairs of slots, with each pair of slots being on opposite sides of the elongated member. Each pair of slots shares a common mounting means that fixes the ends of coupons within that pair of slots.

Abstract: A corrosion cracking test assembly comprising a pair of strips each having notches formed along one edge and assembled in a stressed condition.