Abstract 1,044,317. Hinges and Pivots. A. & D. FABRICATING CO. Inc. Jan. 13, 1965 [Jan. 16,1964], No. 1451/65. Heading E2F. A door is pivoted about two solid torsion bars 65, 66 each with one end clamped in a rigid quadrangular tube 42 formed integrally with the L-shaped frame 37, 40 supporting the door of plastics material, and the other end clamped in the socket 55 of an adjacent hinge base 53 or 54. The ends of the tube 42 are provided with sleeves 75, 80 encircling and rotatable about the sockets 55. A cam surface 83 on the bottom of the sleeve 80 bears on a pair of rollers 87 and is so shaped that the door rises on opening and thus closes by gravity as well as by the action of the torsion bars, and is held in a closed position. The sockets may be adjusted on the hinge bases to pre-set the hinge to ensure that the door closes.
IN A SWINGING DOOR OF THE TYPE FORMED BY A SHEET OF HEAVY, FLEXIBLE, TRANSPARENT MATERIAL HAVING ITS UPPER EDGE, AND ONE SIDE EDGE, SUPPORTED IN AN INVERTED, L SHAPED RIGID FRAME THE COMBINATION OF; A HOLLOW VERTICAL TUBE OF QUADRANGULAR CROSS SECTION, INTEGRALLY FIXED TO THE SIDE PORTION OF SAID L SHAPED FRAME, SAID TUBE BEING OF PREDETERMINED HEIGHT AND HAVING OPPOSITE, OPEN ENDS; A PAIR OF HINGE BASES, EACH HAVING A SOCKET OF QUADRANGULAR CROSS SECTION, AND ADAPTED TO BE AFFIXED AT
Claim 2
Dependent Claim
84 words
IN A SWINGING DOOR OF THE TYPE FORMED BY A SHEET OF HEAVY, FLEXIBLE, TRANSPARENT MATERIAL HAVING ITS UPPER EDGE, AND ONE SIDE EDGE, SUPPORTED IN AN INVERTED, L SHAPED RIGID FRAME THE COMBINATION OF; A HOLLOW VERTICAL TUBE OF QUADRANGULAR CROSS SECTION, INTEGRALLY FIXED TO THE SIDE PORTION OF SAID L SHAPED FRAME, SAID TUBE BEING OF PREDETERMINED HEIGHT AND HAVING OPPOSITE, OPEN ENDS; A PAIR OF HINGE BASES, EACH HAVING A SOCKET OF QUADRANGULAR CROSS SECTION, AND ADAPTED TO BE AFFIXED AT