Abstract: Apparatus for transferring door opening or closing motion, in response to operation of a door handle, comprises: a mounting structure; first, second and third elements carried by the mounting structure for movement relative thereto, the first and third elements coupled to the second element, the second element carried for bodily movement in response to movement of the first element by the door handle, the third element being rotatable in response to bodily movement of the second element; a rotary output element connected to the third element; the second and third elements having alternative coupling positions characterized in that in one position the output element is rotated clockwise when the handle is operated in either direction, and in the other position the output element is rotated counterclockwise when the handle is operated in either direction; and the second element being in the form of a slider coupled to be displaced linearly by the first element when the handle is operated.

Abstract: A door retention assembly locks a door in closed position in response to high temperature as during a fire, the door element having an edge portion closable into adjacent relation to an edge portion defined by a header element, and there being a strike carried by one of the elements. The assembly includes:(a) a latch carried by the other element to relatively move into latching relation with the strike when the door element is closed relative to the header element, thereby to hold the door closed,(b) and a control to control movement of the latch into and out of latching relation with the strike. A heat fusible part, when fused, renders the control inoperable to effect movement of the latch out of latching relation with the strike.