Air line filter

Claim 1

AN AIR LINE FILTERING DEVICE COMPRISING A DIE CAST BODY MADE OF AN ELECTRICAL CONDUCTIVE MATERIAL WHICH INCLUDES ALUMINUM AND HAVING AN INLET CONDUIT, AN OUTLET CONDUIT AND A CHAMBER, A PRESSURE DIFFERENTIAL RESPONSIVE DIAPHRAGM URGED INWARDLY AND DIVIDING SAID CHAMBER INTO TWO COMPARTMENTS THE INNER ONE OF WHICH IS IN COMMUNICATION WITH THE INLET CONDUIT AND THE OUTER ONE OF WHICH IS IN COMMUNICATION WITH THE OUTLET CONDUIT, SIGNAL MEANS ACTUATED BY SAID DIAPHRAGM WHEN THE PRESSURE IN SAID ONE COMPARTMENT EXCEEDS THAT IN THE OTHER COMPARTMENT BY A PREDETERMINED DIFFERENTIAL INCLUDING AN ELEMENT PROPELLED UPWARDLY BY SAID DIAPHRAGM, A TRANSPARENT DOME CLOSING SAID OUTER COMPARTMENT RECEIVING SAID SIGNAL MEANS AND BEING REMOVABLE FOR MANUALLY RESETTING SAME, MEANS ON THE BODY DEFINING A PAIR OF CONCENTRIC SHOULDERS AND A CENTRAL BOSS, AN ACCUMULATOR BOWL OF A PLASTIC DIELECTRIC MATERIAL AXIALLY ENGAGING THE OUTER ONE OF SAID SHOULDERS TO DEFINE A RESERVOIR FOR THE COLLECTION OF LIQUID UNDER PRESSURE IN THE BOTTOM THEREOF, A RING MEMBER ON SAID BODY DETACHABLY SUPPORTING SAID BOWL IN SAID ENGAGEMENT, A POROUS FILTER ELEMENT OF AN ELECTRICALLY CONDUCTIVE SINTERED METAL WHICH INCLUDES COPPER SUPPORTED ON THE OTHER OF SAID CONCENTRIC SHOULDERS, DIELECTRIC MEANS BELOW SAID BODY FOR SUPPORTING SAID FILTER INCLUDING READILY RELEASABLE DIELECTRIC ELEMENTS INTERENGAGING THE FILTER ELEMENT AND BODY, INCLUDING A RESILIENT DIELECTRIC ELEMENT AROUND THE