In a storage rack, the beam has a recess in its front in which there is an opening whose bottom has two low places in it with a higher place in between, and the opening has a finger-like extension away from the end of the beam. A key strip has a neck which can rest securely, substantially without danger of accidental dislodgment, in either one of the two low places, a tab extending from the neck in a direction away from the end of the beam and located parallel to and in front of the recessed part of the beam's front, and a tapered end extending toward the end of the beam from the neck. When the neck is in the lower place nearer the beam's end, the tapered end passes through an opening in a recess in the beam's end and through an opening in the post and locks beam and post from coming apart, and the tab leaves the finger-like end of the front opening quite well open and visible. When the neck is moved to the lower place further from the beam's end, the tapered end is short of the post and its opening, the beam and post are free to be taken apart, and the tab largely covers the finger-like extension of the front opening.
The invention pertains to an assembling device for setting up metal structures, characterized on the one hand, by the fact that the uprights are built as box-type elements having a front plane portion adjacent to two deep mouldings, which themselves are next to the side walls, to which aforesaid mouldings are connected by a semitubular edge, aforesaid deep mouldings being provided with spaced elongated openings, and on the other hand, by the fact that the hooking elements, which are integral with the cross-members, are provided along their height with alternate parallel and perpendicular protrusions with respect to aforesaid front face of the upright, aforesaid perpendicular protrusions fitting into aforesaid openings provided in the bottom of the deep mouldings in the upright.
The invention is a new type of locking mechanism for office panel systems which allows quick joining or separation of connecting panels without the need for tools. This is accomplished by the invention of a spring-loaded "tab and slot" locking mechanism, whereby the opposing tabs from the connecting vertical panel end, enter and lock into matching slots on the other panels by way of a spring-loaded sliding locking bar. Joining adjacent panels requires only that the panels be aligned and firmly pushed together, while separation is allowed by pulling down on the metal rings attached to the bottom of the opposing locking bars and pulling the panels apart.
The loadlock and beam of the present invention are for use with a pallet rack structure in which the beam is connected to an upright of an end frame with the loadlock. The loadlock has a right angled-shaped bolt with a shank slidably extending through an aligned hole in the upright and in an end plate of the beam and has a headed handle portion extending through a contoured slot in the beam wall adjacent the end of the beam. The contoured slot defines three separate positions and cooperates with a generally cylindrical spring metal retainer positioned on the bolt handle having diametrically opposed projecting tabs engaging the innerface of the beam wall adjacent the slot and having projections engageable with the edges of the contoured slot to position the loadlock in any one of the three preselected positions. The slot and the loadlock cooperate to prevent manual movement of the lock between the shipping and locking positions, thereby preventing inadvertent disengagement of the shank from the upright and beam end plate.
A projection screen is formed as at least one reflective holograms each of which, when referenced with a projector, reconstructs a defined observation pupil.
