ES210168U - Flashing device for cinematographic projections. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Intermittent drag device for cinematographic projectors, characterized in that it is provided with two discs crossed by an axis that receives the rotational movement coming from a conventional gear system of a pertinent electric motor; one of whose discs has an angular cut of the appropriate amplitude at its periphery, while the other has an externally emergent part of an appropriate and obliquely arranged configuration joined together; the first of whose discs on both upper flanks is in contact with the internal walls of one of the notches made between two consecutive teeth of the manifolds of which there is a notched and notched piece located perpendicular to the disc, the piece of which is later joined to an axis that by its free end is a toothed disk, whose number of teeth is coincident with that of notches of the aforementioned piece, being said disk, by means of its teeth inserted in the holes of the film, in contact with tape; all of which, in the normal running mode of the projector to which the device is applied, the walls of the disc provided with angular cutting, will rub internally with those of the notches, leaving the frame in exhibition, but when in its movement of rotation it is reached when the cut, the externally emergent part of the second disk that coincides in position with it, will attack the nearest notch by moving the toothed piece to the right and consequently causing the frame to pass, until in the caused displacement, the disk returns to be in contact and imprisoned between the walls of the next notch, repeating the cycle uninterrupted throughout the projection; with what is achieved exposure and change of frame imperceptibly and fully automatically. (Machine-translation by Google Translate, not legally binding)