发明授权
- 专利标题： Stationary sprocket guard assembly
- 专利标题（中）： 固定链轮防护罩组件
-
申请号： US585009申请日： 1975-06-09
-
公开(公告)号： US3958873A公开(公告)日： 1976-05-25
- 发明人: Arthur C. Mueller
- 申请人： Arthur C. Mueller
- 申请人地址： IL Chicago
- 专利权人： Bell & Howell Company
- 当前专利权人： Bell & Howell Company
- 当前专利权人地址： IL Chicago
- 主分类号： G03B1/56
- IPC分类号： G03B1/56
摘要：
A sprocket assembly for a motion picture projector and a method of threading and removing film from the sprocket assembly is disclosed. By selected configuration of the sprocket and the stationary sprocket guard, including aligner and keeper portions cooperating with the teeth of the sprocket, the film is inserted and removed by simply bending and lowering or twisting and lifting relative to the sprocket assembly.
公开/授权文献
- US5687282A Method and apparatus for determining a masked threshold 公开/授权日：1997-11-11
信息查询
