Light display apparatus

Claim 1

Light display apparatus for use near a wall or surface for projecting a strobe-like pattern of light thereon, comprising light source suitable for projecting an image of objects located in the vicinity thereof on a wall or surface; a first cylinder of a material capable of transmitting light therethrough; a first rotor having a plurality of rotor blades associated therewith, said rotor being secured axially within one end of said first cylinder; first mounting means for rotatably mounting said first cylinder so as to enclose at least a portion of said light source and whereby said first cylinder is caused to rotate by vertically rising air heated by said light source; a second cylinder of a material capable of transmitting light therethrough and having a diameter greater than that of said first cylinder; a second rotor having a plurality of rotor blades associAted therewith, said rotor being secured axially within one of said second cylinder, and wherein said plurality of rotor blades are oppositely pitched relative to said plurality of rotor blades associated with said first rotor; second mounting means for rotatably mounting said second cylinder substantially concentrically around, and enclosing at least a part of, said first cylinder and whereby said second cylinder is caused to rotate in an opposite direction from that of said first cylinder; wherein said light source comprises a lamp having a horizontally oriented filament; a stator having a plurality of blades associated therewith and means for mounting said stator so as to direct the flow of heated air toward said first and second rotors; and wherein said first and second cylinders include a plurality of vertical bars of a reflecting pigment, and wherein said bars on said respective cylinders have circumferential widths subtending equal angles.