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上海港务局第六装卸区科技档案室自行设计了一台电子索引机。不论要调用哪一卷,一按电子索引机的按钮,档案资料柜的红灯就立即显示,柜门自动打开,需要的档案资料卷上方箭头自动显示,不到一分钟就可完成调卷的全过程。该机有索引和调卷两部分组成,其原理是: (1)索引部分将1000册案卷归档分类,并按分类原则编成索引号片码,拍成90张胶片。胶按置在直径为250毫米的转盘上,其夹角为4度,在光电控制的同步马达驱动下,用拨叉将胶片移动到光学镜头前。通过灯光投影将索引号码显示在屏幕上。 (2)调卷部分是采用集成块与分立元
Shanghai Port Authority sixth loading and unloading zone science and technology archives designed an electronic indexing machine. No matter which volume to call, press the button on the electronic indexing machine, the file cabinet’s red light will be displayed immediately, and the cabinet door will be opened automatically. The arrow above the required file data will be automatically displayed, and the transfer volume will be completed in less than one minute process. The machine has two parts of the index and adjust the composition, the principle is: (1) Index part of the archives will be archived 1000 cases, and classified according to the principle of classification index number plate, made into 90 films. The glue is placed on a turntable with a diameter of 250 mm and the included angle is 4 degrees. Move the film to the front of the optical lens with a fork, driven by a photoelectric controlled synchronous motor. The index number is displayed on the screen through the light projection. (2) Volume adjustment part is the use of manifolds and discrete elements