Abstract: An air purifier device is disclosed. The device includes at least one first collector, an ionizing device configured to ionize fine particles in the air, an agglomeration chamber configured to aggregate the ionized fine particles, and a frame configured to enclose the ionizing device, agglomeration chamber, and first collector. The first collector includes a non-insulating material first surface of a size greater than 1 square meter, a non-insulating material first reference surface, and a first electric generator configured to apply to the first surface a potential relative to the reference surface between 5 kV and 500 kV. The at least one first collector is configured to collect at least some of the aggregates of the fine particles. The ionizing device includes multiple spikes, a grating, and an electric generator configured to apply to the spikes a predetermined potential relative to the grating of at least 100 kV/m.

Abstract: The invention concerns an assembly comprising a platform assembly (100) intended to receive passengers and a cylindrical structure (200), the platform assembly being mobile within the cylindrical structure. The assembly has very high stability as well as offering the passengers strong sensations of being raised up in the open air, with minimum obstruction of a panoramic view.

Abstract: The invention concerns an assembly comprising a platform assembly (100) intended to receive passengers and a cylindrical structure (200), the platform assembly being mobile within the cylindrical structure. The assembly has very high stability as well as offering the passengers strong sensations of being raised up in the open air, with minimum obstruction of a panoramic view.

Abstract: The invention concerns an assembly comprising a flying balloon (100) and a tower (200). The balloon is captive and mobile in the tower. The captive balloon can ascend and descend along the tower with a limited wind intake or counterbalanced by the retention forces exerted by the tower, and can be flown up regardless of weather conditions without requiring a considerable and cumbersome stabilizing device. Such a balloon may be used as advertising sign and/or as an attraction.

Abstract: Captive balloon assemblies and methods of using the captive balloon assemblies are presented. In an embodiment, the present disclosure provides a method of entertaining. The method comprises providing an assembly comprising a balloon, a tower and a cable driving system. The balloon comprises one or more seats and is captive and mobile in the tower. One or more persons are placed in the seat, and the balloon is caused to ascend within the tower by the cable driving system. The balloon assembly can also be used to generate revenue and display one or more advertisements.