Mechanical and electrostatic gas cleaning mechanism

Claim 1

IN A DUST COLLECTING DEVICE INCLUDING AN ELECTROSTATIC PRECIPITATOR UNIT, A MECHANICAL COLLECTOR, MEANS FOR PASSING GAS TO BE CLEANED SERIALLY THROUGH SAID MECHANICAL COLLECTOR AND PRECIPITATOR, WHEREIN THE MECHANICAL COLLECTOR COMPRISES A CASING HAVING AN INLET PORT AND AN OUTLET PORT, A FIRST TUBE SHEET SEPARATING SAID PORTS ONE FROM THE OTHER, A SECOND TUBE SHEET POSITIONED BELOW SAID FIRST TUBE SHEET AND FORMING A GAS INLET CHAMBER THEREWITH, A PLURALITY OF SEPARATOR TUBES EXTENDING THROUGH AND DEPENDING FROM THE SECOND TUBE SHEET, OUTLET TUBES EXTENDING THROUGH SAID FIRST TUBE SHEET AND PROJECTING INTO EACH OF THE SEPARATOR TUBES, GAS SPINNING MEANS AT THE UPPER ENDS OF THE SEPARATOR TUBES, AND MEANS FOR DIRECTING A STREAM OF GAS INTO THE SPACE BELOW SAID SECOND TUBE SHEET AND IN A COMMUNICATION WITH THE LOWER ENDS OF THE SEPARATOR TUBES WITHOUT PASSING THROUGH SAID GAS SPINNING MEANS.