| 摘要 |
Grip apparatus for use with tensile stress testing apparatus includes a housing having connecting means on the top of the housing for connecting the grip apparatus to the tensile stress testing apparatus. A first elongated bore extends from the bottom of the housing through a portion of the housing parallel to the longitudinal axis of the housing to form a receptacle for a test piece. A pair of second elongated bores extend from the top surface of the housing, converging toward the bottom surface of the housing, with the lower end of each second bore opening into the first bore. Each of said second bores contains a slidable grip bar extending into the first bore and having a grip insert secured on the lower end of the grip bar. A spring loaded release mechanism normally retains the grip bars and grip inserts in a closed position and can be manually operated to release the inserts and grip bars by sliding the grip bars upwardly through the second bores.
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