Patents Assigned to Invicta Plastics Ltd.
  • Weighing scales
    Patent number: 5193631
    Abstract: Weighing scales for use as a teaching aid in educational establishments. The scales include a platform adapted to receive an article to be weighed, a compressible, fluid-containing reservoir, in the form of bellows or diaphragm provided with a fixed wall. The scales are provided with display means which are in fluid communication with the reservoir. The display means is a transparent flexible tube adapted to display the volume of fluid displaced in response to the article being placed upon the platform.
    Type: Grant
    Filed: May 10, 1991
    Date of Patent: March 16, 1993
    Assignee: Invicta Plastics Ltd
    Inventors: Michael Lannie, Lewis W. Horton
  • Teaching clock having indicia carrier allowing curvilinear translation of indicia
    Patent number: 5167507
    Abstract: The invention relates to an eductional aid for teaching children to tell the time. The aid includes a face and at least one pointer rotatable about a centrally disposed axis relative to the face. A carrier is provided which carries indicia which are position behind the face. The face includes apertures through which at least some of the indicia can be seen. A knob for moving said carrier is also provided so that the indicia may be selectively displayed through the apertures.
    Type: Grant
    Filed: May 10, 1991
    Date of Patent: December 1, 1992
    Assignee: Invicta Plastics Ltd.
    Inventors: Nicola J. Cobb, David J. Cragie
  • Weather vane
    Patent number: D344463
    Type: Grant
    Filed: April 9, 1992
    Date of Patent: February 22, 1994
    Assignee: Invicta Plastics Ltd.
    Inventor: Michael Gerrard Lannie
  • Anemometer
    Patent number: D345110
    Type: Grant
    Filed: April 9, 1992
    Date of Patent: March 15, 1994
    Assignee: Invicta Plastics Ltd.
    Inventor: Michael G. Lannie
  • Display stand
    Patent number: D373268
    Type: Grant
    Filed: July 12, 1993
    Date of Patent: September 3, 1996
    Assignee: Invicta Plastic Ltd.
    Inventor: Stephen R. Thompson