By Flowing Away Of A Prefixed Quantity Of Fine Granular Or Liquid Materials, E.g., Sand-glass, Water-clock, Etc. [g04f 1/06] Patents (Class 968/805)
  • Patent number: 7399102
    Abstract: A portable self contained light generating device which is powered by a flow of granular material falling under the influence of gravity to impinge upon and cause a paddle wheel to rotate thereby turning a small generator producing electricity to power one or more light emitting diodes for illumination. The device equipped with a multi-position power/illumination control switch and in some embodiments also provided with a battery providing supplemental power.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: July 15, 2008
    Inventor: James E. Sullivan