Electrostatic filter apparatus

Claim 1

AN ELECTROSTATIC GENERATOR ASSEMBLY ADAPTED TO BE MOUNTED WITHIN AN AIR TREATING APPARATUS HAVING A METALLIC AIR DUCT AND AN ELECTROSTATIC FILTER MEDIUM IN THE AIR STREAM TO REMOVE ENTRAINED PARTICLES IN THE AIR STREAM, WHICH COMPRISES A FIRST AND SECOND ELECTRODE ASSEMBLY COUPLED BY A MOVABLE CHARGE TRANSFERRING MEMBER, MEANS ASSOCIATED WITH SAID TRANSFERRING MEMBER TO ESTABLISH A PREDETERMINED CHARGE ON THE TRANSFERRING MEMBER, A GENERALLY TUBULAR INSULATING HOUSING ENCIRCLING SAID ELECTRODE ASSEMBLIES, MEANS CONNECTED TO THE HOUSING AND THE ELECRODE ASSEMBLIES AND SUPPORTING SAID ELECTRODE ASSEMBLIES WITHIN SAID HOUSING IN SPACED AND INSULATED RELATION, AND AN ENCIRCLING SKIRT WALL SECURED TO THE HOUSING INTERMEDIATE SAID ELECTRODE ASSEMBLIES TO PREVENT DIRECT PASSAGE OF A CHARGE BETWEEN SAID ELECTRODE ASSEMBLIES ALONG THE WALL OF THE HOUSING CARRYING THE SKIRT AND EXTENDING AXIALLY OF THE HOUSING TO SUBSTANTIALLY INCREASE THE EXTERIOR CREEPAGE PATH BETWEEN SAID ELECTRODE ASSEMBLIES.