Patents Assigned to Computer Microfilm International Corporation
  • Image positioning apparatus
    Patent number: 4380776
    Abstract: A microfilm display device is responsive to a film address signal and controlled by a microprocessor to locate a desired film and select a film image for display on a cathode-ray terminal. The film image is converted to a video signal for display on the terminal. The video signal is used for fine positioning of the raster on a flying spot scanner which illuminates the film.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: April 19, 1983
    Assignee: Computer Microfilm International Corporation
    Inventors: David L. Smith, Gerald E. O'Brien
  • Microfilm display apparatus
    Patent number: 4271430
    Abstract: A microfilm display device is responsive to a film address signal and controlled by a microprocessor to locate a desired film and select a film image for display on a cathode-ray terminal. The film image is converted to a video signal for display on the terminal. The video signal is used for fine positioning of the raster on a flying spot scanner which illuminates the film.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: June 2, 1981
    Assignee: Computer Microfilm International Corporation
    Inventor: Gerald E. O'Brien
  • Film card with reference frame
    Patent number: 4225217
    Abstract: A film card for use in an automatic microfilm display apparatus has a plurality of image frames, each bearing a marker image. One of the frames is a reference frame and includes only the marker image. The reference frame can be used for accurate positioning of a raster pattern on the remaining frames.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: September 30, 1980
    Assignee: Computer Microfilm International Corporation
    Inventor: David L. Smith
  • Card selector device
    Patent number: 4223212
    Abstract: A film card selection device for use in an automatic microfilm display apparatus is provided with a switch for sensing that a film card has been selected. A counter counts the number of drive gear teeth passing a selected point after selection of a film card so that the apparatus can be stopped with the selected card in position for retrieval.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: September 16, 1980
    Assignee: Computer Microfilm International Corporation
    Inventors: David L. Smith, John M. Jamieson
  • Card retrieval device
    Patent number: 4190899
    Abstract: A film card retrieval device for use in an automatic microfilm display apparatus is provided with a switch for sensing that a film card has been retrieved. In the event the device fails to retrieve a film card, the absence of a switch output signal causes the control apparatus to repeat the card retrieval routine.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: February 26, 1980
    Assignee: Computer Microfilm International Corporation
    Inventors: Dwight H. Smith, David L. Smith