Limit stop for coverings for architectural openings
View Patent ↗An indexed limit stop for mounting on the headrail of a covering for architectural openings is easily connected to the headrail in overlying relationship with shade material wrapped on a roller in the headrail and has two elements that are pivotally interconnected and movable between selected fixed positions. The second element includes an abutment stop for engagement with the bottom rail of the shade material when the covering is fully retracted and can be positioned such that the abutment stop is spaced from the outer wrap of shade material to avoid damage to the shade material while being desirably positioned for intercepting movement of the bottom rail to limit retracting movement of the roller.
1. A system for limiting retracting movement of a roller in a covering for an architectural opening comprising in combination:
a headrail;
a roller mounted in said headrail for reversible rotating movement between extended and retracted positions, said roller having a flexible shade material mounted thereon so as to be wrappable about said roller in said retracted position and unwrapped from said roller in said extended position, said shade material having a first edge connected to said roller and a second opposite free edge having a bottom rail thereon, and
an adjustable stop mounted on said headrail, said stop including a first element secured to said headrail and a second element pivotally mounted on said first element, an indexing system on said stop for selectively limiting pivotal movement of said second element relative to said first element and for permitting a plurality of preselected fixed relationships between said first and second elements, said second element including an abutment stop adapted to overlie said roller without engaging the shade material on said roller and engage said bottom rail to prevent rotation of said roller in one direction upon said roller being positioned in said retracted position.
2. The system of claim 1 wherein said indexing system includes a plurality of index portions of differing dimension laterally adjacent to each other on one of said elements and a plurality of aligned fingers on the other of said elements adapted to engage said portions at a predetermined angular relationship between said elements.
3. The system of claim 2 wherein said fingers are somewhat rigid but flexible, at least one of which is adapted to snap past an aligned portion on relative pivotal movement between said elements in one direction.
4. The system of claim 3 wherein individual fingers snap past an associated aligned portion at different angular relationships of said elements.
5. The system of claim 4 wherein said fingers snap past said portions in said one direction of pivotal movement of said elements to permit further pivotal movement in said one direction but engage said portions to prevent pivotal movement of said elements in an opposite direction after having been snapped past an aligned portion.
6. The system of claim 5 further including index segments which are arcuate in configuration with each index segment being aligned and spaced from an indexed portion of a different dimension than the other portions and wherein said fingers slide along said portions in pivotal movement of said elements in said first direction and snap past said portions as said fingers become disengaged from said portions.
7. The system of claim 6 wherein individual ones of said fingers become disengaged from an aligned portion at different angular relationships of said elements.