Separable electromagnetic waveguide attenuator

In a shielding enclosure such as a room which has a means to provide a reduction or elimination of radio-frequency wavelengths and electromagnetic emissions leakages into or out of said type assemblies having a casing member composed of portions arranged to define an access opening, members are mounted about said casing member that allows for movement between a first position closing the opening and a second position enabling access through the opening, through said opening it is sought to eliminate or substantially reduce leakage of radio-frequency wavelengths and electromagnetic emissions by an attenuator means across such openings while the door assembly is in the first position closed, said attenuator means comprising,

• a separable waveguide attenuator structure means peripherally mounted around said casing member depicting opening and a means to dispose electromagnets therein, attached thereof an electronic means including an electromagnet wiring circuit operatively connected to said electronic control box in which upon activation energizes said electromagnet therein coupling a ferro-magnetic sheet mounted to door leaf assembly in which the composition of said door leaf assembly, being members forming a flexible and twistable structure which spans across said opening, whereby when said door assembly is in the first position it forms said separable waveguide attenuator between said coupling means and thereby providing a means for eliminating the need to insure a shielding interface connection that is free of gaps, with minimum transitional electrical resistance or an efficacious sealing therebetween;
• said coupling means comprising;
• a ferro-magnetic waveguide structure and electromagnet disposed therein and coupled with pole faces of said structure and ferro-magnetic door leaf structure when said electromagnetic circuit is activated;
• a means for reversibly disengaging of separable waveguide attenuator to allow movement of door leaf assembly to second position without assistance from mechanical devices or other magnetic material;
• a means provided inwhich the electronic wiring of said electromagnet is adapted to be extended into said enclosure and therein be operatively connected to the electronic control box circuit that energizes and de-energizes said electromagnet without the need of electronic filtering devices or a sealed off pathway therebetween;
• a means provided inwhich the electromagnet assumes a dual function by additionally attenuating RFI and EMI radiation by functioning as an electronic filtering device;
• a means provided inwhich a dual electromagnet system provides the functional ability to maintain attenuation values by providing an independent secondary electromagnet, in that it continues to function as normal if the primary electromagnet fails operationally and additionally the ferro-magnetic structure ensures re-energization of malfunctioned electromagnet by the propagation of magnetic flux fields into said electromagnet.