Abstract: A lightweight collapsible compact chair with back support and elevation off the ground is provided by first and second substantially rigid hollow elongated members, and a flexible seat having opposite ends attached respectively to each of said first and second members. First and second vertical posts are provided and each has a lower end portion which is connectable to one of said first and second members. A flexible back is provided having opposite ends each connected respectively to one of said first and second vertical posts. A mechanism is provided for connecting said first and second members together to cause the flexible seat to become outstretched and for mounting said first and second posts to said one of said first and second members.

Abstract: A bicycle locking mechanism is provided including a tubular member which may form part of a bicycle frame, such as the tubular seat post, for example, and an elongated, collapsible, securing element for securing the bicycle frame to an object such as a post or bicycle rack. The elongated, collapsible, securing element has first and second ends and is collapsed in size to a length which is no greater than the length of the tubular member. The securing element fits substantially within the tubular member, when not in use, and is of sufficient length when withdrawn from the tubular member to wrap around an object for securing the bicycle frame thereto. A hinge pin assembly is provided for attaching the first end of the securing element to the tubular member. The securing element may be an elongated, interconnected, linkage assembly or it may consist of a flexible cable.

Abstract: A folding chair with integral transportation tube comprising a seat removably attached to a transportation tube and a base. The seat is a folding seat comprised of a pair of folding seat supports and a seat bottom and seat back attached to the seat supports. The transportation tube and base support the seat in the chair configuration. The seat folds to fit into the transportation tube with the base for transportation.

Abstract: An image projection system uses a projection screen formed over at least a portion of a spherical surface, with either a retroreflective or a directional-specific reflecting material, along with a beamsplitter and at least one lens-projector combination for each real image input to the screen. More than one different input image may be simultaneously used, either with each of the different images provided to a different area of the screen for providing juxtaposed real images to a single observer, or with each of the different real images being provided to a different observer. A non-spherical screen may be used if a retroreflective screen material is used in a system for providing simultaneous real images to spatially-separated plural observers.

Abstract: A slewable projection system of the type having a relatively high-resolution area-of-interest (AOI) scenic portion inset into and blended with a relatively low-resolution field-of-view (FOV) scenic portion of greater areal extent than the high-resolution portion, includes: at least one optical element for providing the low-resolution background image portion; at least one other optical element for providing the high-resolution AOI image portion; an optical combiner receiving the low-resolution and high-resolution image portions; optics for projecting the combined image onto a viewing area; and at least one fiber-optic cable having a multiplicity of fibers for interconnecting the combining element and at least one of the two image optics portions and the projecting optics.