| 摘要 |
A motor driven aerial photographic system with a lightweight frame and having a slidable carriage with a shutter and a film advance member, the carriage being slidable within a multiple track guide. The shutter is provided with a slit for exposing the film and the film advance member is provided with gripping members for advancing the film. A motor drive assembly transforms rotational movement of a gear which is driven by a motor into reciprocating linear motion for driving the carriage between a shutter cocking position and a film exposing position. The film to be exposed is engaged by the gripping members and is advanced as the carriage moves to the shutter cocking position. The film and gripping members are disengaged as the carriage moves toward the film exposing position, the film being stationary during exposure. Film guides maintain registration of the film, shutter and lens. A freely slidable protective shutter plate, which is driven by a pair of shuttle members on the carriage, covers the slit during cocking of the shutter and uncovers the shutter to permit exposure of the film as the shutter moves forwardly during the exposure period.
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