Apparatus for shielding high frequency electrical and electromagnetic waves for tight wall lead-ins for groups of lines

Apparatus for passing a plurality of conductors through a wall or the like in a water, gas, and fireproof manner while providing shielding against high frequency electrical and electromagnetic waves, said conductors having exposed shield jacket portions, said apparatus comprising:

• a frame insertable in said wall for defining a passage therethrough;
• a plurality of fitting pieces in the interior of said frame corresponding in number to the number of conductors;
• a plurality of additional neutral pieces in said frame sufficient to fill same;
• said fitting pieces and neutral pieces being formed of an at least partially elastic material swellable under heat action containing electrically conductive particles,
• each of said fitting pieces being formed as a pair of halves having recesses on their mating surfaces for receiving one of the conductors, each of said recesses having a projection for mating with the exposed shield jacket portion of the conductor within the frame, and
• an elastic material piece centrally positioned in said frame and having a hole receiving a bolt extending through said frame generally parallel to the axes of said recesses, said bolt mounting a pair of pressure plates applied to the faces of said centrally positioned piece and a nut for deforming said centrally positioned piece and exerting compressive forces on said fitting pieces and neutral pieces in said frame to obtain the sealing and shielding action.