A system for rapid production of photographic records

In the land-based radar direction of aircraft it was found necessary to transfer to a large plotting screen a 10X magnification of the PPI cathode-ray tube face. An instrument was developed to do this photographically, with the projected image lagging only 15 seconds behind the latest information. A single 360-degree sweep on the PPI tube is reduced to a $\text{1}\text{2}$-inch diameter image on Eastman Type 5302 Fine Grain Release Positive Film. The resultant image is rapid-processed by the application of hot solutions in a special processing cup which restricts the liquids to a small circular area on the film.The spent solutions are quickly removed by a vacuum line and the near dry image is indexed into the projection system where an air pressure gate completes the drying, cools the film, and holds it flat during projection.The projected image, at a magnification of over 300X, has sufficient quality to resolve all the pertinent detail of the tube face.The method is felt to have some general application.     

浅谈特种设备行政执法法律法规标准体系

本文从建设社会主义法治国家和法治政府的大局出发,按照特种设备必须建立行政执法法律法规标准体系和实现依法行政目标要求,分析现行特种设备行政执法法律法规标准体系,构划了理想的特种设备行政执法法律法规标准体系.     

Studies in the sensitivity of photographic materials

The sensitivity of photographic emulsions is not measured by the exposure necessary to produce an arbitrarily chosen density. It is measured by a definite value of DID…, which is given by the inflection point of the characteristic curve.For simple characteristic curves, the inertia point is quantitatively related to the inflection point.The most complete measurements of sensitivity are obtainable by a quantic analysis of the shape of the characteristic curve.