Abstract:
A quick attach spring retainer holds an extensometer arm (11,12) onto a test specimen (14) under a resilient load using a unitary spring (30), that is quickly placed onto an extensometer, and which has low mass to minimize any effects on dynamic testing. The spring force is reacted so that it creates a very low disturbing moment on the specimen (14) and extensometer (10) in that this clamping force is applied directly diametrically across from the specimen engaging edge (15,16) of the extensometer (10). The unit is made so that it is very stable by providing a three point contact (at 42A, 42B, 15, 16) with the spring (30) and the specimen engaging edge (15). The attachment clip or spring (30), is adjustable across a range of different specimen sizes, using the same type of fixtures, and is made to be a self contained assembly (20) that is not easily lost or misplaced because there are no loose parts. The spring (30) that is utilized is retained in a mounting bracket (21) that is used for attachment.
Abstract:
The present invention relates to a load cell for sensing forces or moments with respect to an orthogonal coordinate system, the load cell comprising: a load cell body including: a rigid central member; a rigid annular ring; and a plurality of radial members extending radially and joining the central member to the annular ring; a plurality of sensing circuits, wherein each radial member includes: a first sensing circuit providing a first output signal responsive to a first force exerted between the central member and the annular ring through the corresponding radial member in a first direction; and a second sensing circuit providing a second output signal responsive to a second force exerted between the central member and the annular ring through the corresponding radial member in a second direction, wherein the second direction is substantially perpendicular to the first direction.
Abstract:
A quick attach spring retainer holds an extensometer arm (11,12) onto a test specimen (14) under a resilient load using a unitary spring (30), that is quickly placed onto an extensometer, and which has low mass to minimize any effects on dynamic testing. The spring force is reacted so that it creates a very low disturbing moment on the specimen (14) and extensometer (10) in that this clamping force is applied directly diametrically across from the specimen engaging edge (15,16) of the extensometer (10). The unit is made so that it is very stable by providing a three point contact (at 42A, 42B, 15, 16) with the spring (30) and the specimen engaging edge (15). The attachment clip or spring (30), is adjustable across a range of different specimen sizes, using the same type of fixtures, and is made to be a self contained assembly (20) that is not easily lost or misplaced because there are no loose parts. The spring (30) that is utilized is retained in a mounting bracket (21) that is used for attachment.
Abstract:
An extensometer assembly measures axial strain, torsional strain, and various combinations of these strains in a specimen (13) on which the extensometer is mounted, through the use of two extensometers (11, 12) on opposite sides of the specimen coupled by a cross-beam (14, 15). Connecting assemblies (16,17) are used to eliminate flexibility in unneeded axes to thereby minimize the opportunities for unwanted signals to occur. The mounting frame (15) is stiff in all axes which are not necessary for measurements. The frame is soft in necessary axes for operation.
Abstract:
An extensometer assembly measures axial strain, torsional strain, and various combinations of these strains in a specimen (13) on which the extensometer is mounted, through the use of two extensometers (11, 12) on opposite sides of the specimen coupled by a cross-beam (14, 15). Connecting assemblies (16,17) are used to eliminate flexibility in unneeded axes to thereby minimize the opportunities for unwanted signals to occur. The mounting frame (15) is stiff in all axes which are not necessary for measurements. The frame is soft in necessary axes for operation.