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Priority to ES216593ApriorityCriticalpatent/ES216593A1/en
Publication of ES216593A1publicationCriticalpatent/ES216593A1/en
A new focusing system for photographic plate enlargement machines or machines, consisting of the use of a light source constituted by an incandescent lamp of the type called punctiform, without excluding the use of another kind of lamps or of electric arcs, coupled to a double-lens capacitor or even parabolic reflector at such distance and with such a diameter of the condenser or reflector that produces a cone of light which, considering a base thereof, the secant corresponding to the position of the clichº closest to the light source, has a median length approximately equal to twice the focal distance of that of the objectives to be used that have the greatest and that allow to be inscribed in each of the secants, parallel to the base that pass through the points of the median that correspond to the focal length of the each of the objectives to be used, taken on said median from the vertex, the diagonals of the clichºs c your format corresponds to each of these objectives (Machine-translation by Google Translate, not legally binding)
ES216593A1954-07-211954-07-21A new focused photographic enlightenment focus system (Machine-translation by Google Translate, not legally binding)
ExpiredES216593A1
(en)
An electronic equipment for "flash" or flash lamp, adaptable to projectors of incandescence (Machine-translation by Google Translate, not legally binding)
Improvements in the construction of fixed view projectors for opaque and transparent bodies (Machine-translation by Google Translate, not legally binding)