Patents by Inventor Robert Flandorfer

Robert Flandorfer 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).

  • Motor control circuit
    Patent number: 4206394
    Abstract: A motor control circuit of the Wheatstone bridge type is described for driving a direct current motor, selectively, in one direction or the other for the general purpose of automatically setting the diaphragm of a photographic camera in accordance with the light impinging on a photo-responsive element.
    Type: Grant
    Filed: June 21, 1978
    Date of Patent: June 3, 1980
    Assignee: Braun Aktiengesellschaft
    Inventor: Robert Flandorfer
  • Exposure control for motion picture cameras
    Patent number: 4084893
    Abstract: A control system is described for automatically setting the exposure of a motion picture camera. The circuits shown include, as basic elements, a photoresponsive device, an amplifier connected thereto, and a stepping motor for actuating the diaphragm of the camera.
    Type: Grant
    Filed: April 22, 1976
    Date of Patent: April 18, 1978
    Assignee: Braun Aktiengesellschaft
    Inventor: Robert Flandorfer
  • Exposure meter for photographic cameras
    Patent number: 3953116
    Abstract: An exposure control arrangement for motion picture cameras of the type in which the diaphragm is set in accordance with the amount of light passing through the objective is described. The activation of the diaphragm is automatically effected by photoelectric means which are energized upon closure of the shutter and disabled during exposure of the film.
    Type: Grant
    Filed: December 3, 1974
    Date of Patent: April 27, 1976
    Assignee: Braun Aktiengesellschaft
    Inventors: Johann Roth, Robert Flandorfer