Patents by Inventor Wilfred S. Stone

Wilfred S. Stone has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4242724
    Abstract: A disposable, floating electric flashlight that glows in the dark and is illuminated by merely squeezing the flashlight casing. Any external switch actuator passing through the flashlight casing is thereby eliminated facilitating buoyancy. When the flashlight is illuminated, phosphorescent material within the internal walls of the flashlight casing is regenerated to cause the flashlight to glow in the dark. If the flashlight is accidentally dropped into water, the lamp is balanced to float the flashlight in a predetermined orientation to enable the glowing light to be quickly retrieved.
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: December 30, 1980
    Inventor: Wilfred S. Stone
  • Patent number: 4210953
    Abstract: This invention relates to a flashlight (1) that may be seen in the dark, (2) which carries a universal mounting on one external wall, and (3) an internal switch adjacent the opposite wall which is elastic and which on pressing will close the switch. By mounting the flashlight above, for example, a keyhole, the flashlight can be seen, and when the outer wall is pressed, the keyhole is illuminated. Moreover, the light bulb within three or four seconds restores the phosphorescent band to luminosity, (reactivation chamber) because part of it is located in a regenerative phosphorescent chamber so that it performs not only the normal lighting function, but regenerates the phosphorescent material on the chamber walls as well. The phosphorescent material, a zinc sulphide or zinc-cadmium sulphide (harmless) has a persistence of glow of two to twelve hours.
    Type: Grant
    Filed: November 19, 1976
    Date of Patent: July 1, 1980
    Inventor: Wilfred S. Stone