Abstract: A modifiable floor structure useful in optimizing the configuration of a public hall is disclosed. The floor structure comprises a plurality of modular platforms, each including a rectangular horizontal panel, a pair of box girders, each box girder having a plurality of housings suitable for enclosing a plurality of folded chairs. Each modular platform also includes a mechanism for elevating and lowering the platform which is adapted such that the modular platform remains level and parallel to the ground as it is raised and lowered. A mechanism for remotely controlling the operation of the elevating mechanism is also included whereby the configuration of a plurality of modular platforms may be controlled from a central location. The seats stored within the housings of the modular platforms may be elevated, thereby positioning them for use above the plane of the modular platform. Furthermore, the seats may is configured in a variety of ways.

Abstract: An extendable and retractable structure with an orientable plane, adapted to cooperate with a holding surface. Connection arrangement are connected to the plane and the holding surfce. The structure includes connecting assemblies of at least two rigid arms of constant length, at least two linearly extendable and retractable actuators which are independent of each other, and controlling device connected to actuators.

Abstract: This invention relates to a device for maneuvering scenery, particularly for stages of theaters and the like. The device includes at least two main rails mounted above the stage, running parallel with respect to each other and symmetrically with respect to the axis of the stage. On each of the rails is a radio transmitter-controlled motorized carriage. A batten having scenic background cloth supported therefrom is suspended from each of its ends by belts extending from each of the carriages. A remote controlled powered winch is provided for each of the suspension belts so that the batten can be raised or lowered through remote control of the winch. The device is particularly applicable to pre-fabricated standardized theater scenery.