Patents Examined by Michael L. Bellner
  • Patent number: 4299461
    Abstract: A dual mode range responsive exposure and flash fire control system operates as a function of the photographic subject being located in either a near distance or a far distance range from the camera. For photographic subjects located within a near camera-to-subject distance range, a flash fire signal is normally provided during the exposure interval at the instant when the blade mechanism defines an aperture size generally corresponding to the camera-to-subject distance to ignite the flash and provide a determinate amount of illumination. For photographic subjects located within a far camera-to-subject distance range, a flash fire signal is normally provided subsequent to the shutter blades reaching a maximum aperture defining position with the flash output being subsequently quenched as a function of scene light detection and integration.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: November 10, 1981
    Assignee: Polaroid Corporation
    Inventors: Richard J. Coppa, James K. Lim, John C. Ostrowski, Marie T. Rodriguez