| 摘要 |
<p>The invention concerns a casing for the outlet access opening in multi-pole heavy-duty electrical outlet boxes, equipped or not with mechanical interlock switches. This casing consists of an exterior frame, made in a polygonal plan, preferably square or rectangular, with a circular knob seat in the middle, equipped with hooks for a bayonet clutch which pass through the bottom of said seat to helical ribs on the outside of a component acting as a coupling, with hinges at one side of said structure permitting connection to the box so that it can be titled open the moment the plug is inserted.</p> |
