Patents by Inventor Bert O. Jonsson

Bert O. Jonsson 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).

  • Door mounted safety apparatus
    Patent number: 5276391
    Abstract: An object sensing apparatus includes a plurality of light emitting diodes for illuminating a region of space and a plurality of closely arranged light detectors for receiving light reflected from an object. The apparatus is particularly useful in connection with automatically operated doors.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: January 4, 1994
    Assignee: Besam AB
    Inventor: Bert O. Jonsson
  • Device for detecting movable objects
    Patent number: 4717820
    Abstract: A device for detecting movable objects within a limited detection area comprises a number of juxtaposed photosemiconductors (A, B) on which an image of the detection area is adapted to impinge and which are uniformly distributed on branches (10, 11) of an electric bridge circuit, such that two juxtaposed photoresistors (A and B, respectively) are included in separate bridge branches (10 and 11, respectively). The bridge branches (10, 11) are connected to a rectifier (13) for generating an output signal.
    Type: Grant
    Filed: January 9, 1986
    Date of Patent: January 5, 1988
    Inventor: Bert O. Jonsson
  • Object sensing apparatus
    Patent number: 4590410
    Abstract: An object sensing apparatus includes a plurality of light emitting diodes for illuminating a region of space and a plurality of closely arranged light detectors for receiving light reflected from an object. The apparatus is particularly useful in connection with automatically operated doors.
    Type: Grant
    Filed: May 21, 1984
    Date of Patent: May 20, 1986
    Inventor: Bert O. Jonsson
  • Object sensing apparatus for an automatic door
    Patent number: 4560912
    Abstract: An object sensing apparatus includes a plurality of light emitting diodes for illuminating a region of space and a plurality of closely arranged light detectors for receiving light reflected from an object. The apparatus is particularly useful in connection with automatically operated doors.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: December 24, 1985
    Assignee: Bert O. Jonsson
    Inventor: Bert O. Jonsson
  • Object sensing apparatus
    Patent number: 4467251
    Abstract: An object sensing apparatus includes a plurality of light emitting diodes for illuminating a region of space and a plurality of closely arranged light detectors for receiving light reflected from an object. The apparatus is particularly useful in connection with automatically operated doors.
    Type: Grant
    Filed: February 11, 1982
    Date of Patent: August 21, 1984
    Assignee: Besam AB
    Inventor: Bert O. Jonsson