Abstract: A sliding door lock assembly providing the feature of automatic unlatching if closed when in a latched position along with effective normal operation and burglar resistance. It employs a latch member spring biased to an open position and cammed into a closed or latched position by a lever member. If the latch is in a locked position and is impacted with the door frame upon closing, it is translated and moves the locking lever to an unlocked position. The locking lever includes a jaw portion which engages the latch effectively. The latch is generally T shaped with the head of the T within the housing of the assembly.

Abstract: A sliding door lock apparatus is provided comprising a housing carrying a holddown tongue and a mounting bracket therefor which has a particularly sized aperture for receiving the housing in angled relation for lock apparatus assembly, and for thereafter securely retaining the housing against vertical movement in a coplanar alignment of the housing frontal portion and the mounting bracket aperture.

Abstract: An improved vent operator for controlling the position of an edge opening vent in the roof of a recreational vehicle or the like is disclosed. The vent operator is coupled to an electric motor, manual jamb or crank or the like, and comprises a set of reduction gears and drives two sector arms which raise or lower the vent cover. The gear reduction is accomplished by spur gears which have good mechanical properties. The cost of the entire apparatus is minimized by making the gears from pressed metal, the sector arms from stampings and the housing from castings. The result is a reliable vent operator that can be produced economically in commercial quantities.