Patent References 3908666 Ultraviolet light control Revolving solar lounger Recreational apparatus Method and apparatus for multiplexed dipole/quadrupole for stimulation/sensing Rotating platform for sunbathers Tanner's platform Chair for sunbathing Tanning pod Patent #: 4989600 InventorsApplicationNo. 677235 filed on 03/29/1991US Classes:607/95, Solar (Natural) light applicator297/217.3, With electrical feature297/217.7Mounted on accommodating platform (e.g., stairs, deck, etc.)ExaminersPrimary: Harrison, Jessica J.Attorney, Agent or FirmInternational ClassA61H 033/06AbstractApparatus for rotating a sunbather's lounge chair in the sun so that the sunbather lying on the chair is exposed to the sun even while the sun direction changes from sunrise to sunset includes a sun direction detector for detecting the relative direction of the sun direct rays to the chair and produces electrical signals representative of that relative direction, the chair being carried on a rotatable platform driven clockwise (CW) or counterclockwise (CCW) as requires to position the lounge chair in the direct rays of the sun; the sun direction detector including two directional photo-detectors on the rotatable platform, held with their directions normal to generally upright planes that meet at an angle less than 180°, and the drive driving the platform to maintain the outputs of the photo-detectors equal or in a predetermined relationship. | |