Torsion bar multiple section door balance

Claim 1

THE COMBINATION WITH A TWO PART DOOR, ONE PART HINGED TO THE OTHER; MEANS ROCKABLY SUPPORTING THE DOOR FROM THE UPPER END OF ONE PART; THE OTHER PART HANGING NORMALLY FROM THE LOWER END OF THE UPPER PART TO HAVE BOTH PARTS IN A COMMON, SUBSTANTIALLY VERTICAL PLANE; SUBSTANTIALLY VERTICALLY DISPOSED TRACK MEANS ALONG OPPOSITE SIDES OF SAID DOOR PARTS AND IN A COMMON PLANE; AND MEANS INTERENGAGING THE LOWER DOOR PART WITH SAID TRACK MEANS, WHEREBY THE HINGE LINE BETWEEN THE TWO PARTS WILL SWING OUTWARDLY FROM THE PLANE OF THE TRACK MEANS AND THE LOWER DOOR PART WILL RAISE AND LOWER ALONG SAID TRACK AT SAID INTERENGAGING MEANS UPON OUTWARD SWINGING OF THE UPPER DOOR PART: OF A TORSION BAR EXTENDING ACROSS SAID DOOR UPPER PART ADJACENT SAID HINGE LINE; AN ARM EXTENDING APPROXIMATELY AT A RIGHT ANGLE FROM ONE END OF THE BAR AND ALONG THE DOOR LOWER PART; MEANS MOUNTED ON SAID LOWER PART AND ENGAGING THE OTHER END OF SAID BAR AXIALLY TWISTING THE BAR TO PRESS SAID ARM AGAINST THE DOOR LOWER PART; BRACKET MEANS MOUNTED ON THE DOOR UPPER PART INTERMEDIATE SAID ARM AND SAID TWISTING MEANS, THROUGH WHICH BRACKETS THE BAR MAY ROTATE; SAID ARM URGING UPWARD TRAVEL OF THE DOOR LOWER PART IN RELATION TO THE SWINGING OF THE DOOR UPPER PART; A SECOND TORSION BAR EXTENDING ALONG THE FIRST BAR ACROSS SAID DOOR UPPER PART ADJACENT SAID HINGE LINE; AN ARM EXTENDING FROM AN END PORTION OF SAID SECOND BAR AT THE DOOR SIDE OPPOSITE FROM THE FIRST ARM AND DOWNWARDLY OVER THE DOOR LOWER PART; MEANS MOUNTED ON THE DOOR UPPER PART FOR TWISTING SAID SECOND BAR TO URGE ITS ARM AWAY FROM THE DOOR LOWER PART; SAID BRACKETS ALSO ROTATABLY SUPPORTING SAID SECOND BAR; AND OTHER BRACKETS, ONE FOR EACH OF SAID ARMS FIXED TO SAID DOOR LOWER PART AND THROUGH WHICH THE ARMS MAY SLIDE.