| 摘要 |
<p>A pair of hemispheric caps (12, 13) is foreseen supported on an annular inside frame, rotating in the inverse sense in synchronism with the assembly rotation. Spotlights are employed fitted on the envelopes, the polychromous ray pencils of which, coming from parts having different movements, generate dynamic projection effects with different interference. The cap motion is given by a motor (14) inside fitted on the frame annular turning a conical gear (15) engaged on a pair of line conical gears (16, 17) driving a relevant shaft pair (6, 7) supporting them, stabilized on bearings with frame settlers to the rotation only. The assembly rotation is possible through another gear (18) engaged in opposition to the first one (15) on the two line gears (16, 17) driving a Cardan joint (20) fitted on the frame and turning on its stationary support.</p> |
