SU5045A1 - Cinema apparatus for stereoscopic shooting - Google Patents

Description

FIG. 1 of the drawing shows the proposed apparatus in plan, without a casing and without coils 37, 38, 39 and 40, FIG. 2 is a side view with the above-mentioned coils; FIG. 3 is a front view of the parts shown in FIG. 1, and in FIG. 4, 5, b, 7 and 8 details.

The proposed apparatus is equipped with two objectives, the main optical axes of which are located in a horizontal, or almost horizontal plane and are spaced from each other by 10-TOO and more cm and are located approximately parallel to each other. In addition, there is an ECH, EP of devices with which a normal and timely transfer of the rays of light captured by the lenses to the same film located between the lenses is achieved. The seed in the proposed apparatus is produced in such a way that

the film alternates right 19 and left 192 shots. The goal of the Semka offered by the apparatus is to obtain the film indicated in FIG. 8 samples.

- Rays of light 10–11, hit two objec- tives 12–13 and pass them, fall, when leaving the objec, on an opaque rotate, ice shutter 14. At the moment when the only transparent, not material, sector 20 of the shutter 14 is equal to In this case, one 24th obturator becomes against one of the objectivs, for example 13,. rays of light from the objecte will fall on the mirror 16 (a crystal prism with full internal reflection can serve as a mirror). Having reflected from the mirror 16 (the angle of incidence is equal to the angle of reflection, in this case 45 °), the rays fall on the mirror 18 and, having reflected from here, they fall (in the middle normally) on

corresponding place 19 films. The number of revolutions of the obturator is obtained from a minimum number of ten shots with one obektov in one second; therefore, the duration of exposure depends only on the size of the central-. which sector angle and, in this case, is designed for one 240th part of a minute, after which sector 20 passes through the opening of objecte 13, and the entire interior of the chamber with a system of prisms sinks into darkness. In the period required by the transparent sector 20, having described, with a uniform movement, the semicircle, go to the hole of the opposite objective 12 and illuminate the film from this side (the time interval is one-twentieth second) moves (at a distance equal to the height of the two shots) as follows: the obturator 14 is mounted tightly on the shaft 21 rotating in a bearing 22 placed at the end of the stand 23. At the other end of the shaft 21 the gear wheel 24 is tightly mounted The gear 25 receives its movement from the serration 26 mounted on the shaft 27. At the other end of the shaft 27, a tightly tapered, incomplete (sector with a central angle of 90 °) gear 28 is mounted, driving the same gear 29 of equal diameter (all said gears shown schematically with initial circles). Only 90 ° of the circumference of the gear 29 is occupied by the teeth, the rest of the teeth are not and serve only as a balance to the gear sector. The rotation of the said incomplete gear 28 with respect to the rotation of the obturator 14 is calculated as follows: first of all, one revolution of the gear 28 accounts for exactly one revolution of the obturator 14 (the diameters and all other dimensions of the gears 24 and 26 are equal). As soon as the transparent sector 20 of the obturator 14 rises above objective 12 and

penetration of light into the camera through one or another lens will not be possible, gear sector 30 of gear 28 approaches gear 29, and while transparent sector 20 of the shutter 14 goes to lens 13, gear sector 30 of gear 28 rotates gear 29 by 90 °. In order to achieve accuracy in rotation by 90 ° on the side of gear 29, a latch is arranged consisting of a lever 51 pressed by a spring 55 and a screw 56 on gear 29. In the notches 53 on gear 2 there is an end part of the lever 51; Thus, gear 29 is fixed, in a strictly defined position, until incomplete segment 62 of gear 28 pushes lever 51 out of cut 53 of gear 29. Drum 31, when fitted tightly on shaft 32, also rotates exactly 90 °. A quarter of the circumference of the drum 31 is exactly equal to the height of two shots of films 19i and 19-2. Therefore, the drum 31, turning a quarter turn, pulls film 19 a distance equal to the height of two divisions:. When the transparent sector 20 moves from obekt 13 to obektov 12 of film 19, it remains in place. Thus, film 19 is advanced two divisions at once. Both divisions are exhibited in turn by right and left objectifs, after which films are moved into the next two divisions (snapshot). A pulley 33 is mounted tightly on the shaft 32 of the drum 31, through which an endless chain 34 runs, driving the pulley (sprocket 35). The sprocket 35 is tightly fastened to the drum 37 by means of the shaft 36. Thanks to such a device, the drum 37 moves in the same way as the drum 31. The edges of the drums are jagged, and their teeth fit into the hole of the films (the teeth are not shown in the drawings). Movie advancement is achieved using these two reels 31-37. Film 19 between the reels 31 - 37 support

Coils 38-39-40, whose shafts 41-42-43 are fastened with spikes in the walls of the box 44-45. The whole system is set in motion by means of a sprocket that is fitted tightly on the shaft 21.

The subject of the patent.

1. A cinematographic apparatus for stereoscopic sems, characterized by using two objectives 12 and 13 and two systems of mirrors or prisms 15, 17 and 16, 18 to reflect, one above the other, both images directly onto film 19,

.

promoted each time by an amount equal to two shots.

2. In the apparatus specified in paragraph 1, a moving device for films, consisting of drums 31-37 wrapped around a chain 34, a system of bevel gears 29, 28 and cylindrical gears 26, 25 and 24, which cause a rotation of the obturator 14 with sector 20 equal to / 24 of its surface.

3. In the apparatus specified in clause 1, a device for ensuring the accuracy of rotation of the drum 31 on a / 4 circle, consisting of a lever 51 with a spring 54, engaging gear 29 with a notch 53, and a segment 62 on gear 28, which serves for uncoupling leverage.

Vi.S.