SU10356A1 - Film projection apparatus with continuous film feed and optical alignment - Google Patents

Description

When passing through a conventional film-projection apparatus, the film makes a sharply intermittent motion, which results in a blinking of the picture on the screen and rapid wear of the film. The proposed film projection apparatus for displaying a continuously moving film.

In FIG. 1 is a side view of the apparatus according to the invention; FIG. 2-frame frame, FIG. 3- obturator, FIG. 4-view of the lenses from the side of the obturator, FIG. 5 - the same, front view.

In the proposed film projection apparatus with continuous film feed and optical alignment, three lenses are used, enclosed in a common frame K (Figs. 1, 4 and 5), rotating on the O axis. A lens F is installed in front of the lenses (Fig. 1 and 3), equipped with a spiral cutout C and rotating on the shaft B carrying the gear W, which is connected to the gear 3 of the lens mount 1C. The number of teeth of the teeth 3 is three times the number of teeth of the teeth L1.

The hollow shaft B has a square hole at the end where it is

tetrahedral shaft B (Fig. 1), so that it is possible to approach and remove the frame K of the lenses from the frame. The frame frame P (Fig. 2) has a double height window and moves to the right and back with the help of an eccentric E placed at the end of the BI shaft. In front of the frame P (Fig. 1) a rotating T plate with a spiral notch D is installed.

Film F advances continuously, with the help of the gear drum B, where the cutout / plates T follow the movement of the film, opening only one frame in the path of the light beam. When designing a frame, frame P is moved with the help of an eccentric E, to the right and back, thus achieving the coincidence of the frame motion with the motion of one of the rotating lenses. When designing each frame, the lenses rotate one-third of the circle, with this, while one lens moves from position a to position b (Fig. 5), the cutout C of the shutter F follows the movement of the designed frame, overlapping the neighboring frame.

To adjust the image on the screen, use a screw P, which allows you to zoom in and out of the lens from the frame P.

The subject of the patent.

Film projection apparatus with continuous film feed and optical alignment, characterized by the use of three lenses enclosed in a common frame K, in front of which a shutter F rotating on shaft B is fitted with spiral cut C, and a rotating T with spiral cut is installed in front of a double frame P to open only one frame on the light path.

(vg fig. b