| 摘要 |
Apparatus for testing the tensile strength of moving wire without subjecting wire at the supply coil or other source to high tension, comprising a main pulley with two grooves and a free pulley biased away from the main pulley for leading wire in a loop from one main pulley groove to the other. Guides for guiding wire to and away from the main pulley assure a 180 DEG wire wrap about each main pulley groove. This permits a high-testing tension to exist in the loop that extends about the free pulley, while only a low tension exists prior to entering on the main pulley and after leaving it.
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