1. A TRAVELING SUCTION CLEANER ADAPTED TO BE MOUNTED ON A TRACK EXTENDING OVER A TEXTILE MANUFACTURING OPERATION IN A TEXTILE MILL AND COMPRISING; (A) A CARRIAGE, (B) AN ELECTRIC MOTOR ON SAID CARRIAGE, (C) FIRST AND SECOND SPACED AIR IMPELLERS DRIVEN BY SAID MOTOR, (D) A FIRST HOUSING ENCLOSING SAID FIRST IMPELLER AND FORMING AN AIR INLET AT ONE END THEREOF AND HAVING AN AIR OUTLET, (E) A SECOND, VOLUTE HOUSING ENCLOSING SAID SECOND IMPELLER AND SPACED FROM SAID FIRST HOUSING, (F) MEANS CONNECTING BOTH HOUSINGS TO SAID CARRIAGE, (G) SAID SECOND HOUSING HAVING AN AIR INLET AND AN AIR OUTLET, (H) A COLLECTION CHAMBER CONNECTED TO SAID LAST-NAMED OUTLET,