专利名称：AUTOMATIC FILM FEED DEVICE发明人：POTTS E,US申请号：US20094571申请日：19711122公开号：US3823890A公开日：19740716
摘要：A plurality of rotatable horizontal turntable disks rotate to feed out or take upmotion picture film, as it is transported through a projector. Optional threadingarrangements enable any of the turntable disks to function as a supply or take up reel.Moreover, the third turntable effectively provides a spare which gives stand-by reliability.Suitable analog sensors detect film tension or broken film conditions and control the filmfeed accordingly. The analog sensors eliminate hunting as the mechanical operationsproceed.
申请人：POTTS E,US
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