Abstract: A chair comprising a seat, and a backrest including a lower portion which is connected to the seat and which has an upper end, a rear surface, and a forwardly facing lower body supporting surface, an upper portion having a lower end, an upper body supporting surface, and a surface opposite the upper body supporting surface, and structure connecting the lower end of the upper portion to the upper end of the lower portion for translational movement relative thereto between a locked position wherein the upper and lower body supporting surfaces are generally coplanar, and an intermediate position spaced upwardly from the locked position, and for pivotal movement relative thereto between the intermediate position and a folded-up position wherein the rear surface of the lower portion and the opposite surface of the upper portion are substantially in abutment.

Abstract: A card file having a rotor with radiating arms, each of which has a card-carrying tray detachably connected thereto. The rotor is mounted in a housing for rotation about a horizontal axis so that each tray can be brought to a detent-defined viewing position at which the tray is disposed in a substantially horizontal attitude affording ready access to the file cards carried thereby. Inwardly facing ribs on the lower portion of the housing have their edges concentric to the axis of the rotor to be engagable by the outer extremities of the trays as they traverse the lower portion of their orbit upon rotation of the rotor, to thereby prevent detachment of the trays from the rotor arms. The various components of the rotor are held assembled with one another and with the housing entirely without reliance upon screws, bolts, rivets or the like.

Abstract: A card file having a rotor with radiating arms, each of which has a card-carrying tray detachably connected thereto. The rotor is mounted in a housing for rotation about a horizontal axis so that each tray can be brought to a detent-defined viewing position at which the tray is disposed in a substantially horizontal attitude affording ready access to the file cards carried thereby. Inwardly facing ribs on the lower portion of the housing have their edges concentric to the axis of the rotor to be engagable by the outer extremities of the trays as they traverse the lower portion of their orbit upon rotation of the rotor, to thereby prevent detachment of the trays from the rotor arms. The various components of the rotor are held assembled with one another and with the housing entirely without reliance upon screws, bolts, rivets or the like.