| 摘要 |
<p>A mechanism for controlling a pivoting needle is provided for pneumatic carriers. The transmission of the pivoting motion of the control arm (20) at its bearing point on the movable needle (5) is achieved through a bell crank arm (21) hinged both onto the controlled arm and onto a fixed stop (26) for driving the needle acting as a bearing point, the bell crank arm further carrying a guiding roller (22) intended to follow the two inclined planes DC-CE of a same cam (24) rigidly mounted on a housing (1). Application to filled switching installations operating in all directions of circulation of the cartridges, under vacuum or pressurized conditions. </p> |
