Show automatic fasteners to hold garage doors open A simple device for holding garage doors open automatically Is iff illustrated below two swivel bolts bolta are made as detailed and fastened through the lintel or head jamb of the door they are free to turn as the long locking bars pass through the slots blots in them when the doors are opened the required als amu i Q JN vba PIPE bleeve aj 1 0 DOOR SM N AND kal even in a high wind the heavy garage doors door are prevented automatically mati cally from closing tance notches in the bars engage the bolts and act as a catch the bars then will hold the doors open against the strongest wind if the garage has a side entrance the same bars also may be used as a lock it la Is necessary merely to cut a second notch in each bar as shown and enlarge the pivot hole bole to an oval chains or bell cords fastened to the ends of the bars and passed over pulleys provide convenient means for unlocking the doors F N C in popular science monthly |