| 摘要 |
A device intended for transmitting from a driving shaft to a driven member, in a bi-directional and non-reversible way, a limited torque, wherein said driven member, rotatably mounted on the driving shaft, is braked at rest by a bi-directional logarithmic brake, suppression means provide for suppressing the braking action upon rotation of the driving shaft, a torsion balance is provided for transmitting a torque under angular displacement from the driving shaft to the driven member, and reinstatement means reinstate said braking action when said angular displacement overcomes a pre-determined limit angle. |
