Abstract: A clear plastic, PLEXIGLAS.RTM. or other suitable, clear, "unbreakable" lens may be either hingedly opened from and closed to or otherwise removed from and replaced in laminar relationship with respect to a refrigerator/freezer door. Adhesive, magnetic or other suitable fastening material are used to fix display items to the lens or door. When the lens closes over the items a visually pleasing frame protects the displayed items and allows for easy removal and substitution. In one embodiment, the lens is hinged to one side of a freezer door on an upright, top-freezer refrigerator. In a second embodiment, lenses are hinged to the outside edges and latched on the inside edges of both doors of an upright, side-by-side double-door refrigerator/freezer combination. In either embodiment, the lens can be inset into the door so as to provide surfaces on the same planes as those of the remainder of the door.

Abstract: An emergency vehicle light bar assembly employs first and second connected substantially horizontal elongated frames mounted transversely across the upper surface of an emergency vehicle. The connecting assembly is such that the second frame may be substantially continuously vertically displaced while maintaining parallel relationship of the frames so that the emergency indicating equipment fixed atop the second frame maintains its operational attitude regardless of the elevation to which the second frame is raised. Reciprocable operation of the connecting assembly may be accomplished by electric, hydraulic, pneumatic or manual drive systems.

Abstract: An improvement in airliner seat backs and snack tray tables facilitates the display of replaceable printed or pictorial materials for viewing by passengers seated rearwardly of the display. The materials are displayed through a transparent window pane overlaping the interior perimeter of a window in the rear portion of the seat back or the top or bottom sides of the table. The printed or pictorial materials are releasably held in face-to-face relationship with the window pane by various means depending on the structure of the seat back or table. The improvement is adapted to existing tray tables by use of a thin resiliently flexible member fitted to the contours of the tray table and releasably snappable to the table with the printed or pictorial materials in place.