Fan belt adjuster

Claim 1

A BELT TENSIONING DEVICE FOR A BELT PASSING OVER A SHEAVE MOUNTED ON A FIRST SUPPORT AND OVER A PULLEY MOUNTED ON A SECOND SUPPORT TURNABLE ABOUT A PIVOT AXIS PARALLEL TO THE AXES OF SAID SHEAVE AND PULLEY, COMPRISING, IN COMBINATION, AN ELONGATED BRACKET; MEANS FOR SECURING SAID BRACKET AT ONE END TO SUCH FIRST SUPPORT; FIRST ABUTMENT MEANS AT THE OTHER END OF SAID BRACKET; A ROD-SHAPED ADJUSTING MEMBER SECURED AT ONE END BOTH TO THE TURNABLE SECOND SUPPORT AT A POINT SPACED FROM THE PIVOT AXIS THEREOF AND ALSO TO SAID ELONGATED BRACKET SO AS TO BE MOVABLE IN LONGITUDINAL DIRECTION OF THE LATTER; ADJUSTABLE SECOND ABUTMENT MEANS MOUNTED AT THE OTHER END OF SAID ROD-SHAPED ADJUSTING MEMBER ADJUSTABLE IN LONGITUDINAL DIRECTION THEREOF; AND COMPRESSION-SPRING MEANS MOUNTED ON SAID ROD-SHAPED ADJUSTING MEMBER SURROUNDING THE SAME AND ABUTTING WITH ONE END AGAINST SAID FIRST ABUTMENT MEANS ON SAID ELONGATED BRACKET AND WITH THE OTHER END AGAINST THE SECOND ABUTMENT MEANS ON SAID RODSHAPED ADJUSTING MEMBER SO AS TO PERMANENTLY TEND TO MOVE SAID ROD-SHAPED ADJUSTING MEMBER TOGETHER WITH THE SECOND SUPPORT IN A DIRECTION AWAY FROM SAID ONE END OF SAID ELONGATED BRACKET.