Electrical circuitry employing an isolation transformer

Claim 1

IN AN ISOLATION TRANSFORMER: A CLOSED MAGNETIC CORE COMPRISING TWO C-SHAPED MEMBERS HAVING THEIR TIPS ABUTTING TO FORM TWO SPACEDAPART LEGS EXTENDING ALONG PARALLEL AXES; A PAIR OF BOBBINS MOUNTED ON TE RESPECTIVE CORE LEGS, EACH OF SAID BOBBINS BEING SPACED FROM THE RESPECTIVE LEGS BY A LAYER OF DIELECTRIC MATERIAL, EACH OF SAID BOBBINS BEING COMPOSED OF METAL AND BEING ELECTRICALLY SEPARATED ALONG A LINE ALONG ITS LENGTH, THE TWO LINES OF SEPARATION BEING ON THE INNER SIDES OF THE RESPECTIVE LEGS; A PAIR OF TRANSFORMER WINDINGS WOUND ON THE RESPECTIVE BOBBINS; A METALLIC FLANGE MEMBER ON EACH OUTER END OF EACH BOBBIN; EACH OF SAID FLANGE MEMBERS BEING ELECTRICALLY DIVIDED ALONG LINES OF SEPARATION ON THE INNER SIDES OF THE RESPECTIVE LEGS OF SAID CORE; AND A PAIR OF DIVIDED SHIELD PLATES SUPPORTED BETWEEN SAID WINDINGS, EACH DIVIDED SHIELD PLATE COMPRISING TWO METALLIC SEGMENTS THAT ARE ELECTRICALLY SEPARATED ALONG LINES OF SEPARATION, EACH OF SAID SHIELD PLATES BEING MOUNTED ON OPPOSITE SIDES OF A DIELECTRIC SHEET MEMBER, ALL OF SAID LINES OF SEPARATION LYING IN A COMMON PLATES, THE SEGMENTS OF EACH SHIELD PLATE BEING ELECTRICALLY CONNECTED TO THE PORTIONS OF THE ADJACENT FLANGES THAT LIE ON OPPOSITE SIDES OF SAID COMMON PLANE.