Electronic air filter

Claim 1

An electronic filter, comprising: first and second outside metallic screens; first and second outside metal frames, said first and second outside screens being mounted in and supported by said first and second outside frames, respectively; first hinge means connecting said first and second frames together along corresponding edges thereof, said first and second screens being moveable between a closed, parallel position and an open position; an inside metallic screen; an inside frame, constructed of electrically insulating material, said inside screen being mounted in and supported by said inside frame; second hinge means pivotally mounting said inside frame to one of said outside frames, said inside screen being between and parallel to said outside screens when said outside screens are in said closed position, said inside screen being electrically insulated from said outside screens; a high voltage power supply unit secured to one of said outside frames, said high voltage power supply being electrically connected across said inside and outside screens; and first and second removable fibrous pads positionable between said inside screen and said first and second outside screens, respectively, said pads being removable when said outside screens are in said open position.