Abstract: A method for assembling a theater and a theater. The method includes assembling a modular auditorium on a surface within a building structure by providing a plurality of nominal inventory portions. Each nominal inventory portions includes a prefabricated base portion, and a prefabricated tier section for assembly to the base portion. The prefabricated base portion is positioned on a ground surface of a public performance space. The prefabricated tier section is fastened to the prefabricated base portion to form a self supporting structure that does not require lateral support from a building structure other than the ground surface.

Abstract: A method for assembling a theater and a theater. The method includes assembling a modular auditorium on a surface within a building structure by providing a plurality of nominal inventory portions. Each nominal inventory portions includes a prefabricated base portion, and a prefabricated tier section for assembly to the base portion. The prefabricated base portion is positioned on a ground surface of a public performance space. The prefabricated tier section is fastened to the prefabricated base portion to form a self supporting structure that does not require lateral support from a building structure other than the ground surface.

Abstract: A reeling device for the controlled coiling and uncoiling of a cable has a first end that is fixed and a second end that is movable relative to the first end. The cable is unbroken between its first and second ends. The reeling device includes first and second reels about which the cable is coiled. The first and second reels are coaxial. The first reel is fixed against rotation and axial movement, and the second reel is rotatable about the axis with such rotation causing axial movement of the second reel relative to the first reel.

Abstract: A method for assembling a modular auditorium and modular auditorium. The method includes providing a plurality of nominal inventory portions. Each nominal inventory portions includes a prefabricated base portion, and a prefabricated tier section for assembly to the base portion. The prefabricated base portion is positioned on a ground surface of a public performance space. The prefabricated tier section is fastened to the prefabricated base portion to form a self supporting modular auditorium structure that does not require lateral support from a building structure other than the ground surface.

Abstract: There is provided a lifting fixture securable to a lifting machine adapted for lifting/manipulating corresponding tier sections for assembly/disassembly of a modular auditorium including a plurality of tubes connected to a first fixture portion and a second fixture portion, the plurality of tubes adapted to be selectively secured to the lifting machine, the first fixture portion and the second fixture portion including a plurality of lifting interfaces adapted to interface with corresponding lifting interfaces of the corresponding tier sections.

Abstract: A method for assembling a modular auditorium and modular auditorium. The method includes providing a plurality of nominal inventory portions. Each nominal inventory portions includes a prefabricated base portion, and a prefabricated tier section for assembly to the base portion. The prefabricated base portion is positioned on a ground surface of a public performance space. The prefabricated tier section is fastened to the prefabricated base portion to form a self supporting modular auditorium structure that does not require lateral support from a building structure other than the ground surface.

Abstract: There is provided a lifting fixture securable to a lifting machine adapted for lifting/manipulating corresponding tier sections for assembly/disassembly of a modular auditorium including a plurality of tubes connected to a first fixture portion and a second fixture portion, the plurality of tubes adapted to be selectively secured to the lifting machine, the first fixture portion and the second fixture portion including a plurality of lifting interfaces adapted to interface with corresponding lifting interfaces of the corresponding tier sections.

Abstract: There is provided a modular auditorium including a base portion and a plurality of tier sections assembled to the base portion. Each tier section includes a longitudinal beam, and a first floor portion and a second floor portion cantilevered from opposed regions of the longitudinal beam.

Abstract: There is provided a modular auditorium including a base portion and a plurality of tier sections assembled to the base portion. Each tier section includes a longitudinal beam, and a first floor portion and a second floor portion cantilevered from opposed regions of the longitudinal beam.

Abstract: There is described a self-braking motor that comprises a stator, a plurality of permanent magnets and magnetic hysteresis material. The permanent magnets are disposed concentrically between the stator and the magnetic hysteresis material and an air gap is provided between the magnetic hysteresis material and the permanent magnets. The self-braking motor has a first configuration, where the magnetic hysteresis material rotates with the permanent magnets, and a second configuration, where the magnetic hysteresis material is restricted from rotating with the permanent magnets.

Abstract: A platform system, in particular for providing staging, which consists of a number of platform units each of which comprises a flat platform having on the underside thereof hollow posts of square cross-section for receiving tubular legs of circular cross-section for supporting the platform. The legs of the respective platform units may be different heights to give a variable height system. Also the legs may be suitably bent to provide a raked platform.