Patents by Inventor Melvin R. Andrews

Melvin R. Andrews 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: 5135425
    Abstract: A magnetic spinner toy includes a plurality of spinner bodies mounted one adjacent another on a support base for independent rotation. A plurality of permanent spinner magnets are mounted on each spinner body at circumferentially spaced positions for rotation closely adjacent the spinner magnets of the adjacent spinner body. The magnetic poles of the confronting surfaces of the spinner magnets of adjacent spinner bodies are either of like polarity, whereby to repel each other, or of unlike polarity, whereby they attract each other. A pair of permanent levitating magnets are mounted one on each spinner body and the other on the support base with the confronting faces of the pair being of the same polarity, whereby to repel each other and thus maintain the spinner body spaced from the support base to eliminate frictional engagement between them.
    Type: Grant
    Filed: July 19, 1990
    Date of Patent: August 4, 1992
    Inventors: Melvin R. Andrews, Roger W. Andrews
  • Patent number: 4200283
    Abstract: A spinning top game includes a spinner mounting a permanent magnet, a housing having a dished top base for supporting the spinner above an induction coil in the housing connected in an electric circuit including a source of electric potential and an electronic switch so arranged that when the spinner is rotated on the dished base, the moving magnetic field of the magnet cuts the coil turns and the resulting induced current operates the electronic switch intermittently to connect the source of electric potential across the coil, the resulting current flow through the coil producing a magnetic field which is imposed upon the moving magnet spinner such as to accelerate its movement.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: April 29, 1980
    Inventors: Roger W. Andrews, Melvin R. Andrews
  • Patent number: D264371
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: May 11, 1982
    Inventor: Melvin R. Andrews