Abstract: An improved parasol with an improved ventilation system. The parasol, includes a foldable frame with concentric first and second panels. The radius of the first panel is shorter than the length of the rib of the parasol. The second panel is annular in shape and covers the area from the outer periphery of the first panel to the outermost edge of the parasol. A cord is provided between the second panel's inner periphery and the stretchers to enlarge the gaps at the areas where the first and the second panel overlap. A plurality of elastic loops are provided at the first panel's outer periphery to provide elasticity to the first panel to prevent the first panel from turning inside out in strong wind.

Abstract: A lightweight, spacious and collapsible tent having an apex and contacting the ground on three struts, utilizing: three collapsible subframes each containg four struts pivotally connected at one end to a central hub and extending radially outward to a distal end; a flexible covering having four sides and corners, said covering overlaying the hub and struts and extending so that each corner extends to the distal end of a strut; each of said subframes being connected along two sides to one of the sides of each of the other two subframes; each of said subframes having a strut the distal end of which is pivotally connected to the distal end of a strut from each of the other two subframes to form the apex of the tent; and each of said subframes resting on the ground on the distal end of a strut farthest from the apex.

Abstract: The umbrella has a frame composed of a plurality of ribs, stretchers and a combined panel consisting of a main panel and a secondary panel, wherein, the area of the main panel is smaller than that of the fully expanded ribs of the frame, and the inner edge of the secondary panel matches the outer edge of the main panel. The main and secondary panels concentrically cover the frame, and a plurality of ropes are mounted between the inner edge of the secondary panel and the frame, which are used to increase spaces between the outer edge of the main panel and the inner edge of the secondary panel, and moreover, improve efficiency of air convection, save panel material and simplify manufacturing procedures.

Abstract: A ventilation device for tents with at least one roof top (8) and a place for an open fire under this roof top, the tent cloth (4) having an upper boundary (12) at a distance below the apex of this roof top, so that an opening (9) for discharging flue gases coming from a fire is formed at the roof top, comprises a net (10) substantially impervious to insects, which is arranged in said flue gas opening (9) so as to prevent insects from getting into the tent through this opening. The insects net is movably arranged with respect to the frame work of the tent and the device further comprises an arrangement (14, 15, 18) for regulating the degree of the coverage of the flue gas opening by the insects net between a first position substantially entirely covering it and at least a position in which the flue gas opening is at least partially set free.

Abstract: A kit of parts for forming a structure which may be a play structure or a shelter, and which is at least partially of dome-like shape and which can resemble an igloo, comprises a series of side panels of generally trapezoidal shape each with side edges which are at least partially bowed outwardly and are capable of being joined edge-to-edge to adjacent side panels when curved to conform to said dome-like shape. The side panels are longitudinally flexible, and each has an upper end portion which is pleated to allow the upper edges of panels to be pushed together as the panels are joined. A convex top closure is provided for fitting over the top edges of the panels, and the pleated upper end portions allow ventilation around the edges of the closure.

Abstract: A tent is provided with a ventilator opening in one corner thereof. The tent includes a pair of side panels which are secured together along a side seam and a top panel which is secured to the side panels along a top seam. One of the side panels is provided with an opening adjacent the top and side seams, and a screen covers the opening. A skirt is secured to the top and side seams and includes a free edge which is spaced from the screen. A stiffener is secured to the skirt adjacent the free edge thereof for maintaining the free edge away from the screen.

Abstract: A shading device is provided which consists of a rooflike structure and a mechanism for supporting the rooflike structure above the ground, so that the rooflike structure will serve as a shelter, especially for the interception of rays from the sun to diminish light intensity.

Abstract: Two pipe-construction houses of a shed-roofed type, facing each other at their ridge sides with a gap provided between the ridges, are coupled with girders to make an integrated construction. The sides are covered with rollable ventilative sheets, and its roof is made of a soft plastic film span on a pipe-construction roof frame above a hard plastic sheet spread along the central part in the longitudinal direction of the roof. Cultivation beds of rust-prevention-coated thin steel sheet are hung on bed bearing fittings of a pipe structure. Nutrient solution is fed by an air lift pump under control by electric conductance thereof.

Abstract: A tent-like apparatus which has a substantial portion of its roof cut out to form a roof opening. Fastener means are provided around the roof opening, and various types of inserts each having its own fastener about its peripheral edge and each being sized to be fitted within the roof opening and the two fastener portions releasably secured together. The roof opening may be uncovered to provide a direct view and air supply but relatively no protection from inclement weather, insects and the like. A first panel insert may include conventional tent material. A sheet of flexible transparent plastic material may be provided as an insert to provide a clear unobstructed view, protection from the effects of inclement weather, insects and the like, solar heating within the interior of the tent even in relatively cold weather so long as the sun is shining, and sufficient ultraviolet radiation to the tent interior to permit the occupant therein to obtain a suntan in any type of sunny weather.

Abstract: Significant, life-saving protection from airborne, radioactive (fallout) particles due to nuclear explosions, nuclear reactor accidents, and other releases of radioactive particulate is provided by a double-wall tent structure quickly erectable over a central bench or hole. The tent structure includes tightly woven, rip-resistant fabric panels supported by tensile rods or wands, a tub floor extending into and lining a central trench or hole, and an exterior, light-reflecting, metalized, semi-transparent disposable membrane. The bottom circumferential edge of the outer membrane extends into a shallow trench or ditch, excavated around the perimeter of the inner tent structure. Dust particles settling onto the smooth exterior surface of the membrane slide off and are captured in the shallow ditch, thus minimizing direct or indirect radiation into the central trench or hole and its occupants.