Swingable floor for planetariums

Details Swingable floor for planetariums Swingable floor for planetariums

E - Fixed Constructions

04

B

20/2

E04B 1/343 (2006.01) G09B 27/02 (2006.01)

Patent

CA 1195466

Abstract of the disclosure The floor or a section of the floor of a planetarium, together with the seats, can be swung on a horizontal pivot or swivel shaft between a horizontal position for a planetarium display and an oblique position for wide-angle projection during the display. In order that the seats and seat platforms nevertheless remain at all times horizontal, a second swivel shaft is provided vertically below the swivel axis for the floor, for a truss or brace which is connected in parallelogram-like manner with the floor by vertical struts. The seats and seat platforms are rigidly secured to the struts.

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