| 摘要 |
A light apparatus, which produces a central motionless light beam and at least one light beam rotating around the central beam, includes a cylindrical housing, a parabolic reflector, a lamp having a light sours in reflector's focus and a rotating non-transparent disk having a central round opening and at least one noncentral opening. The disk is placed in front of the lamp with the reflector. The disk rotates without use of an electromotor. For rotation, the disk is mounted in an inner mobile metallic, for example aluminum, ring of ball-bearing, wherein balls, separators and an outer fixed ring are electric insulators. The diameter of the disk is preferably close to the diameter of the inner ring and to the diameter of the reflector. The inner ring is rotated by a rotating magnetic field. The disk rotates together with the inner ring. The rotating magnetic field is created by an inductor-stator, when the inductor-stator is supplied by polyphase alternating electric current.
|
