Patent for a new and improved door-check. This design "has relation to door-checks . . . for retaining a door or gate in any desired opened position; and it has for its objects to provide such a door-check in which the holding or clamping mechanism of the check is operated automatically from the latch or knob of the lock, to provide a strong brace for retaining the door in its adjusted position . . . a bolt casing slides upon a rail carried at the upper edge of the door and has a bolt operated from the lock of the door for engaging the said rail, and in which a brace or arm is pivoted to the door-frame" (lines 8-26).