Slide fastener stop

Claim 1

IN A DEVICE OF THE CLASS DESCRIBED, HAVING A PAIR OF STRINGERS CARRYING FASTENER ELEMENTS, A SLIDER HAVING A CONSTRICTED THROAT PORTION AND DIVERGING CHANNELS DEFINED BY TOP AND BOTTOM WINGS AND A PAIR OF FLARED SIDE WALLS CONNECTED BY A FROG, EACH SIDE WALL COMPRISING TWO PARTS SEPARATED BY A SLOT TO PERMIT THE MOVEMENT OF THE STRINGERS, SAID DEVICE ALSO HAVING A SEPARABLE END CONNECTION FOR SAID STRINGERS INCLUDING A STOP MEMBER TO LIMIT MOVEMENT OF THE SLIDER IN ONE DIRECTION AND A SOCKET THEREIN; THE IMPROVEMENT PROVIDING MEANS TO PREVENT MIS MESHING OF SAID FASTERNER ELEMENTS, SAID MEANS COMPRISING A PIN JOINED TO ONE OF SAID STRINGERS AND ADAPTED TO PASS THROUGH ONE OF THE CHANNELS OF THE SLIDER AND TO ENGAGE IN SAID SOCKET, AN INTER-ENGAGING PROJECTION AND RECESS ON SAID PIN AND STOP MEMBER ADAPTED TO POSITION SAID PIN IN SAID SOCKET, A STRAIGHT WALL AT THE CONSTRICTED THROAT PORTION OF SAID SLIDER DISPOSED AT RIGHT ANGLES TO THE LONGITUDINAL AXIS O SAID SLIDER, AND ANGULARLY DISPOSED WALLS ON THE INNER END OF THE SOCKET PORTION OF SAID STOP MEMBER WHICH MEET AT A RAIED APEX IN THE PATH OF SAID SLIDER MIDWAY OF THE WIDTH OF SAID STOP MEMBER TO ENGAGE SAID STRAIGHT WALL ON SAID SLIDER AND PERMIT SAID SLIDER TO LEAN TO ONE SIDE OF THE LONGITUDINAL AXIS OF SAID STOP MEMBER TO PERMIT READY ENTRANCE OF SAID PIN THROUGH SAID SLIDER INTO SAID SOCKET OF SAID STOP MEMBER.