Abstract: An assembly comprising a pair of latch drive mechanisms each being mountable on opposite sides of a door and including drive members to actuate a door latch mechanism mounted within the door. The assembly further includes a pair of handles, each of which is rigidly fixed to the surface of an escutcheon component which attaches to the latch actuating member of the latch drive mechanism and, when so attached, conceals the latch drive mechanism. Also included is a privacy locking set adapted for use with the latch drive assembly which provides a control function at the inside of the door which locks the handle at the outside of the door. The control side also includes an automatic release function actuated by the operation of the handle at the control side. The release function incurs no lost motion due to an independent handle operation feature of the latch drive mechanism.

Abstract: A dual function lock mechanism includes a body (30,32), and a cam member (34) mounted on the body for rotation about an axis. A retractor (36) is adapted to drive a latch bolt and is supported for sliding movement transversely with respect to the axis. Means is provided to slide the retractor in a first direction to retract the latch bolt from a latch position to a release position. By virtue of respective cooperable mutually engageable formations (41,72) on the cam member and on the retractor means, a predetermined first rotational movement of the cam member is effective to slide the retractor in a direction opposite the said first direction to move the latch bolt from the latch position to an extended lock position, and a predetermined opposite rotational movement is effective to return the latch bolt from the lock position to the latch position. Detent means (64) is provided to engage and thereby normally prevent the retractor from moving the latch bolt from the lock position to the latch position.