| 摘要 |
<p>The system brings a tool, on a tilting mounting on the boom of an earthmoving machine, or similar, back into a preselected initial position. The tool can be a loading shovel or a fork-lift truck. Use is made of an automatic switch on the tool, dependent on position. In its circuit there is a magnetic control appliance, linked to it so that the return of the tool to a selected setting is effected from predetermined working settings. The preselected initial setting may be a trench angle setting, on a loader shovel, while on a fork-lift truck the switch can assume the role of a parallel guiding system. It can be a mercury or pendulum switch, pref. setable from different switch positions. This permits the optimal angle setting of the tool to be set as required, with automatic adjustment before operation.</p> |
