公开(公告)号：US5715494A

公开(公告)日：1998-02-03

申请号：US627163

申请日：1996-04-03

Applicant: Clark Eugene Harris ,  Mark David Fraser

Inventor： Clark Eugene Harris ,  Mark David Fraser

IPC: G03B1/60 ,  G03B17/30 ,  G03B17/26

CPC classification number: G03B17/30 ,  G03B2217/263

Abstract: A film cartridge comprising a rotatable film spool, an indicator window, an annular indicator wheel rotatable behind the indicator window to move a film-exposed indication on the indicator wheel to the indicator window, and an annular drive wheel rotatably coupled with the film spool for rotating the indicator wheel to move the film-exposed indication to the indicator window, is characterized in that the indicator wheel is resilient and a flex-inducing protuberance is located to distort successive portions of the indicator wheel towards the indicator window as the indicator wheel is rotated, to position the film-exposed indication in the indicator window.

Abstract translation: 一种胶片暗盒，包括一个可转动的胶片卷轴，一个指示窗，一个环形指示轮，可旋转在指示窗后面，将指示轮上的胶片曝光指示移动到指示窗上;以及环形驱动轮， 旋转指示轮以将胶片暴露的指示移动到指示器窗口，其特征在于，指示轮是弹性的，并且柔性诱导突起被定位成使得指示轮朝向指示器窗的连续部分变形，因为指示轮是 旋转，将胶片曝光指示定位在指示窗中。