Belt aligning and tensioning apparatus

Claim 1

IN A BELT TENSIONING AN ALIGNING DEVICE FOR A CONVEYOR OF THE BELT TYPE HAVING A RIGID FRAME CARRYING A PAIR OF SPACED BELT SUPPORTING DRUMS WITH A CONVEYOR BELT RUNNING OVER THEM, BEARINGS RIGIDLY MOUNTED IN SAID FRAME AND ARRANGED TO SUPPORT ONE OF SAID DRUMS, BEARING CARRYING BRACKETS MOUNTED IN SAID FRAME IN A MANNER TO SUPPORT THE OTHER OF SAID DRUMS FOR TILTING MOVEMENT, BEARINGS SLIDABLY MOUNTED IN SAID BRACKETS AND ARRANGED TO SUPPORT SAID MOVABLE DRUM FOR MOVEMENT TOWARD OR FROM SAID FIRST DRUM TO TENSION SAID BELT, SAID BRACKETS BEING MOUNTED TO PROVIDE FOR TILTING MOVEMENT OF SAID MOVABLE DRUM IN DIRECTION TRANSVERSE TO THE DIRECTION OF TENSIONING MOVEMENT OF SAID BEARINGS, MEANS TO SECURE SAID SLIDABLY MOUNTED BEARINGS IN ADJUSTED POSITION IN SAID BRACKETS, AND AUTOMATICALLY OPERATING BELT TRACKING CONTROL APPARATUS ARRANGED TO RESPOND TO MISALIGNMENT OF SAID BELT AND OPERATIVE TO EFFECT TILTING MOVEMENT OF SAID MOVABLE DRUM IN DIRECTION TO CORRECT THE MISALIGNMENT OF SAID BELT, THE ARRANGEMENT BEING SUCH THAT THE TENSIONING OF SAID BELT MAY BE ADJUSTED WITHOUT DISTURBING THE ALIGNMENT AND THE ALIGNMENT MAY BE CORRECTED WITHOUT DISTURBING THE TENSION.