Apparatus for filtering dust-laden gases

Claim 1

APPARATUS FOR FILTERING SUSPENDED PARTICLES FROM GASES WHICH COMPRISES AT LEAST ONE FILTER ELEMENT, SAID ELEMENT COMPRISING A CONTAINER HAVING A PAIR OF SPACED WALLS OF FILTERING FABRIC AND AN OPENING AT ONE END, A U-SHAPED TUBE DISPOSED IN SAID CONTAINER WITH ITS TRANSVERSE PART BEARING AGAINST THE END OF SAID CONTAINER OPPOSITE SAID OPEN END TO HOLD SAID SPACED WALLS TAUT, A SUPPORT INDEPENDENT OF THE CONTAINER SUPPORTING THE TWO BRANCHES OF THE U-SHAPED TUBE ADJUSTABLY FOR ADJUSTMENT TOWARDS OR AWAY FROM THE SUPPER TO ADJUST THE TAUTNESS OF SAID SPACED WALLS, MEANS TO SUPPORT SAID SPACED WALLS AT SPOTS SPACED THROUGHOUT THE AREA OF SAID WALLS AGAINST MOVEMENT TRANSVERSE TO THE PLANES OF SAID WALLS AT SAID SPOTS AND TO PERMIT SAID WALLS TO VIBRATE IN THE SPACES BETWEEN SAID SPOTS, AND MEANS TO DRAW GASES THROUGH THE WALLS OF SAID CONTAINER AND THROUGH SAID OPENING AND TO ADMIT VIBRATIVE PULSES OF GAS UNDER PRESSUER THROUGH SAID OPENING TO VIBRATE THE FLAT WALLS OF SAID CONTAINER BETWEEN SAID SPOTS.