| 摘要 |
The picker stick of a loom is operated by a pneumatic cylinder and piston motor having a pressure chamber communicating with a closed container for air at a predetermined pressure so that the pneumatic piston is biassed. Hydraulic resetting piston means, operated by a liquid in a resetting chamber, hold the pneumatic piston in an initial position. When the resetting chamber in the hydraulic resetting cylinder is relieved by opening a control valve, the pneumatic piston drives the picker stick whereupon the control valve is shifted to another position so that the hydraulic resetting piston resets the pneumatic piston to the initial position. |
