| 摘要 |
Torque wrench comprising a driving head, an operating arm and adjustable torque limit signalling means. The first arm (12) is drivingly connected with the driving head (11) and the second arm (14) is pivotally coupled to the head (11). The torque limit signalling assembly (16) is slidably adjustable in position along one of the arms for selecting a torque limit. The assembly includes a non-linear spring means (31) arranged to transmit force between the arms and to signal the occurrence of an abrupt change in spring force in accordance with the selected limit. |
