| 摘要 |
<p>The mechanical locking device has a roller locking element (14) positioned in aligned openings (6a,6b) in the adjacent side walls (4a,4b) of the mechanically combined protection switches, the operating element (8a,8b) of the protection switch which is switched in causing the locking element to be pushed into a dished recess (12a,12b) in the operating element of the other protection switch, for preventing its simultaneous operation. An independent claim for a tool for holding and inserting a locking element in aligned openings in side walls of mechanically combined protection switches is also included.</p> |
