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Stel S L
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Stel S L
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Priority to ES1970163285UpriorityCriticalpatent/ES163285Y/en
Publication of ES163285UpublicationCriticalpatent/ES163285U/en
Application grantedgrantedCritical
Publication of ES163285YpublicationCriticalpatent/ES163285Y/en
Dovetailed Work, And Nailing Machines And Stapling Machines For Wood
(AREA)
Basic Packing Technique
(AREA)
Abstract
A focus apparatus for illuminating frames, characterized in that it comprises; an enclosure in the form of a parallelepiped box inside which is arranged a transformer supplied by the mains current and whose output, at low voltage, supplies a lamp of relatively high intensity, also placed inside said enclosure; a focus lens placed on the front wall of the envelope, facing the lamp, which concentrates the beam of light from the lit lamp whose tubular periphery has a series of angularly spaced, circumferential grooves, through which can be introduced sheet-shaped elements that form a device that fulfills the function of shutter, manually operated. (Machine-translation by Google Translate, not legally binding)
ES1970163285U1970-11-131970-11-13
A FOCUS APPARATUS FOR ILLUMINATING PICTURES.
ExpiredES163285Y
(en)
Procedure for the automatic compensation of the luminous intensity in the sliding projectors. (Machine-translation by Google Translate, not legally binding)
Device for the suppression of photocell exciter lamp in the reproduction of film film sound. (Machine-translation by Google Translate, not legally binding)