Self-clarifying filter system

Claim 1

IN A WATER TREATMENT SYSTEM, AN AUTOMATIC SELFCLEANING FILTER FOR REMOVING AND ELIMINATING IGNITABLE PRODUCTS OF CARBONACEOUS SEWAGE MATERIAL FROM A FLUID FLOWING THROUGH A SEWAGE CONDUIT AND FORWARD FLUSHING SAID FILTER SYTEM UTILIZING THE NORMAL FLUID FLOW IN SAID CONDUIT, THE COMBINATION COMPRISING: A PLURALITY OF ELECTRIC CONDUCTING FILTERS LONGITUDINALLY SPACED WITHIN SAID CONDUIT AND EXTENDING TRANSVERSELY THEREACROSS, THE POROSITY OF SAID FILTERS DECREASING ING THE DIRECTION OF FLUID FLOW, SAID CONDUIT BEING FORMED OF A NONCONDUCTING MATERIAL, SAID FLUID PASSING THROUGH SAID FILTERS, SAID PARTICLES OF CARBONACEOUS MATERIAL BEING TRAPPED BY SAID FILTERS, EACH OF SAID FILTERS BEING COMPRISED OF ELECTRIC CONDUCTING ELECTRICAL RESISTANCE ELEMENTS, SAID FILTERS BEING SUPPORTED BETWEEN TWO SPACED ELECTRIC CONDUCTING ELECTRODES AND ELECTRICALLY CONNECTED THERETO, SAID ELECTRODES BEING MAINTAINED IN SPACED RELATIONSHIP BY TWO INSULATED SPREADER MEMBERS, SAID ELECTRODES AND SAID SPREADER MEMBERS FORMING A FRAME FOR SAID FILTER, SAID FRAME BEING SEATED WITHIN SAID CONDUIT; FIRST AND SECOND SOURCES OF ELECTRIC CURRENT, SAID SECOND SOURCE BEING RELATIVELY SMALL COMPARED WITH SAID FIRST SOURCE; A NORMALLY OPEN SWITCH FOR CONNECTING SAID FIRST SOURCE ACROSS THE ELECTRODES OF EACH OF SAID FILTERS FOR HEATING THE ELEMENTS OF SAID FILTER TO A TEMPERATURE SUFFCIENT TO IGNITE SAID CARBONACEOUS SEWAGE MATERIAL, WHEREBY THE SIZE OF SAID FLUSHED BY THE NORMAL FLUID PARTICLES ARE FORWARD FLUSHED BY THE NORMAL FLUID FLOW THROUGH SAID FILTER; A RELAY FOR CLOSING SAID SWITCH, SAID RELAY HAVING A WINDING CONNECTED IN SERIES WITH SAID SECOND SOURCE ACROSS THE ELECTRODES OF EACH OF SAID FILTERS, SAID RELAY BEING ENERGIZED BY THE CURRENTS FLOWING THROUGH SAID WINDING TO CLOSE SAID SWITCH WHEN THE CURRENTS THROUGH SAID WINDING EXCEED A PREDETERMINED LEVEL, THE ELECTRICAL RESISTANCE OF SAID FILTERS DECREASING AS TRAPPED PARTICLES OF CARBONACEOUS SEWAGE MATERIAL ACCUMULATES THEREON; A GAS PRESSURE RELIEF MEANS IN SAID CONDUIT ADJACENT SAID FILTERS FOR VENTING SAID CONDUIT WHEN THE PRESSURE IN SAID CONDUIT, DUE TO THE IGNITION OF SAID MATERIALS, EXCEEDS A PREDETERMINED MANGITUDE.