Patent ID: 7043859

Claim:
In a display sign having a support plate, a plurality of cards, and a hinge that retains each of the cards to enable the cards to be folded from one side of the hinge to another side of the hinge to display numerals, the improvement comprising: a retaining member having a periphery containing a lobe portion and being rotatable from a retaining position, wherein the lobe portion overlies an edge portion of one of the cards, to an open position, wherein the lobe portion is free of the edge portion of said one of the cards; and a lock assembly on the retaining member that includes a threaded member that is rotatable between a locked position, preventing rotation of the retaining member while in the retaining position, and an unlocked position that allows rotation of the retaining member from the retaining to the open position, the lock assembly further comprises an aperture formed in the support plate and a lug on the retaining member that engages the aperture while the threaded member is in the locked position and disengages from the aperture while the threaded member is in the unlocked position.