Abstract: A rotary file having an outer fixed cabinet and an inner cabinet rotatable on a vertical axis includes a locking mechanism comprised of a pair of simultaneously movable stops that can interfere with rotation of the inner cabinet in either direction. The stops are spaced from each other and are hinge-mounted to a fixed base of the outer cabinet so that they can be raised up to an interfering position with any one of the four sides of a square base member of the inner rotatable cabinet. One stop precludes rotation of the inner cabinet in a clockwise direction, while the other stop precludes rotation of the inner cabinet in a counterclockwise direction. An elongated bell crank member, rotatable on a horizontal axis by means of a user-activated locking handle, is connected to the hinge-mounted stops by a pair of vertically extending parallel links, movement of the bell crank member causing concurrent movement of the stops between their interfering and non-interfering positions.

Abstract: A knockdown metal shelving assembly is disclosed. Upright frame members providing vertical series of equidistantly spaced keyhole slots are interconnected by horizontally extending shelf supports. Interconnection portions of the shelf supports are punch pressed to provide tablike projections that are inserted and retained in associated keyhole slots in the frame members. Each tablike projection includes an arcuate load-bearing portion that rests in contiguous relationship throughout its extent on a corresponding arcuate edge along the bottom of the keyhole slot. That portion of the keyhole slot receiving the load-bearing portion of the tablike projection is slightly undersized to provide an interference fit for lockably retaining the projection in the slot.