Abstract: A frame for a collapsible lampshade. The frame includes an upper support member and a lower support member spaced apart from the upper support member, a shade spider having a central hub and a plurality of cross members extending radially from the central hub and a plurality of lampshade brackets. Each bracket includes a first elongated member and a second elongated member movably connected at an end thereof to the lower support member. The brackets further include a crossbar extending between and connected to another end of the first and second elongated members such that the crossbar is releasably engagable with the second end of the respective cross member of the shade spider in order to facilitate movement of the frame between a collapsed position and an upright position.

Abstract: A rigidified, conical structure formed of pleated or finely fluted material, having particular application to a lampshade. It includes a lampshade body which is formed of a tube of the pleated material which is radially collapsed at one end giving the tube a frustoconical shape. An outer shell of small diameter fits around the exterior surface of the collapsed end of the lampshade body, and an inner shell of larger diameter fits against the inner surface thereof. The two shells are drawn toward each other by a bolt and the lampshade body is clamped to the surface contours of the shells to become rigidified and to give the lampshade a cone angle which is determined by the shape of the shells.