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    • 30. 发明授权
    • Depressurized underwater one-time-use camera with seal integrity indicator and method
    • 减压水下一次性相机,具有密封完整性指标和方法
    • US06636697B2
    • 2003-10-21
    • US10027291
    • 2001-12-21
    • Stephen J. SmithCraig A. BakerWayne E. Stiehler
    • Stephen J. SmithCraig A. BakerWayne E. Stiehler
    • G03B1708
    • G03B17/08
    • In a photography method, a partial vacuum is provided within a pressure housing of a camera having an unexposed film unit. The camera is sealed against both air entry and venting, while in the partial vacuum. The camera is kept sealed until the film unit is fully exposed and while sealed, a relative pressure differential between the interior of the camera and an environment external to the camera is continuous indicated. The camera has a housing having an internal cavity water-tightly sealed from the external environment. The internal cavity has an unsubmerged internal pressure, at room temperature, less than air pressure at sea level. The camera has a camera frame assembly disposed in the internal cavity and a seal integrity indicator that provides the continuous indication of the relative pressure differential.
    • 在摄影方法中,在具有未曝光胶片单元的相机的压力壳体内设置局部真空。 在部分真空中,相机被密封以防止空气进入和排气。 照相机保持密封,直到胶片单元完全曝光并且密封,相机内部和照相机外部的环境之间的相对压力差是连续的。 相机具有外壳,其具有与外部环境水密密封的内部空腔。 内腔内部压力较小,室温低于海平面气压。 相机具有设置在内腔中的相机框架组件和提供相对压力差的连续指示的密封完整性指示器。