Abstract: A hopper gate mechanism for opening and closing the bottom opening of a hopper containing vehicle. The mechanism typically includes two doors hinged along the longitudinal axis of the associated vehicle and fluid pressure actuated motor means for selectively actuating latching members normally employed to maintain the doors in a closed position.

Abstract: A protective enclosure for building openings such as windows and doorways wherein the protective enclosure comprises a peripheral frame member that circumscribes the openings and pivotally mounts a transparent shielding unit. The unit which may function as a window or door, depending upon the application, is provided with a unique hinge and locking arrangement which facilitates the easy opening and closing of the unit with respect to the opening; yet one which provides security against the unauthorized entry through the opening in that the unit may not be removed from the building opening from the outside of the building when the unit is in a closed position.

Abstract: A pair of doors hinged to a frame and including a self-locking three-point latch and coordinated closing system.

Abstract: A mechanism for securing a dome-shaped door in an opening of a vessel to effect sealing with respect to pressure at either side of the door, the convex side of the door being directed towards the exterior of the vessel and the mechanism being disposed at the concave side of the door and including locking members radially movable into a door locking position and a spider assembly connect to move the locking members and mounted for movement along a shaft carried by the door between a position in which the assembly is adjacent the door and the locking members are retracted from the door locking position and a position in which the assembly is spaced from the concave side of the door and the locking members are in the door locking position, whereby the mechanism can be retained substantially within the recess defined by the door at its concave side.

Abstract: A series of bracs sized to fit louvre and jalousie glass panes when fitted with a latching unit provides an excellent security or locking device for windows.

Abstract: A trailer and a demountable container for transporting loose products or refuse is disclosed herein. The container has an internal ejector slidable over its entire length for ejecting the contents therein. The trailer has mounted on its bed a centering relief longitudinally positioning the container, a pin engaging an aperture in the front of the container holds the container in a lateral position, and a hydraulic ram for moving the internal ejector from the front of the container to the rear. A guide, part on the trailer bed and part in the container, supports the hydraulic ram at intermediate points along its length to prevent the ram from bending or buckling as it is being extended. Coupling and alignment of the mechanical parts and hydraulic ram is insured automatically with the placement of the container on the bed of the trailer.

Abstract: A grille mounting apparatus operable to support a grille on a tractor grille frame assembly for swinging movement between a service position wherein the grille is disposed to one side of the tractor grille frame assembly and a normal operating position wherein the grille is disposed in juxtapositioned relationship with respect to an inwardly extending flange of the tractor grille frame assembly. Improved fastening means are utilized to maintain the grille in its normal operating position, which fastening means may be released without the use of tools to permit the grille to be moved to its service position.

Abstract: A railway house car plug door includes mechanism for moving the door transversely of the car side wall out of and into closed position and for ensuring that the door locking bars are retracted during such transverse movements, and are in locking position when the door is fully closed and comprises a vertically elongated plate mounted for rack and pinion actuated vertically slidable movement in guides on the door. At its upper end the plate is notched at both sides and provided with protruding ears engageable with rolls on bellcranks to actuate the top locking bars, these bellcranks being connected by vertical links to bellcranks controlling the bottom locking bars.

Abstract: A window and lock structure therefor for drawing the window sash tightly against the window frame, with the locking structure including a keeper on the window sash engageable by a locking shoe mounted on the frame and with the locking shoe having compound movement to engage the keeper and draw the sash tightly closed, with the movement of the locking shoe being derived from mechanism actuated by engagement with another part of the window sash as the window sash is closed.