SU13417A1 - Device for uniformly moving a film without perforation in a film projector - Google Patents

Description

The present invention relates to a fixture, slguzhaschego for moving the film in a film projector and is to eliminate the filmstrip perforations and associated therewith devices in iroektiruyuschih apparatus with irimeneniem for smooth neredvpzhenil tape uniformly pivoting carriage and drum nrizhimnshn rollers actuator conductive film have a smooth, jerk-free , advancement and enabling the image to be positioned in front of the lens smoothly and quickly.

In the schematic drawing, the kinoannarat is shown in longitudinal section.

The apparatus consists of a carriage 1, provided with rollers 8.8 and a bar directed downwards, having a tooth 2 at the lower end; the carriage is articulated with rods 3 swinging on axles 4.4 and fixed in the body of the apparatus. At the upper pair of rods 3 there is a roller 7 through which the film L passes, the envelope of the rollers 8.8 and the upper roller 6 located in an elastic support above the drum A, with a smooth or rubber-covered surface against which the film is pressed by this roller 6, then rounding the drum A and after pressing to the surface of the drum with the lower elastic roller 6, the tape comes out of

apparatus. The drum A is located on the axis 10, on which the bars 11 are loosely worn, provided at opposite ends with roundings 20, which are turned on to-. Lacha surface 19 of the roller 18, located in the frame of the apparatus. Between the bars 11 on axles 14 and 15 are located gears, on them the nerve is connected to the ratchet wheel D and the second wheel 16 is connected to the pulley 17 or to the handle to bring it into rotational motion, transmitted in the same direction and with the same the speed of the ratchet wheel B p to drum A. During rotation, the teeth of the storage wheel B nudge tooth 2, fixed on the lower end of the bar of carriage 1, lift the last one along with barbell 3.3 and then, after jumping the tooth 2 from the ratchet tooth, the carriage pulls down spring 9 and its br juice 1 IADA rezinovuyuiodkladku on the carriage 13. Together with neremeschaets and tape than when the carriage during lifting-belt relative to the carriage but is drawn uniformly downwardly at the same rate as the carriage nodnimaets upwards. The magnitude of the carriage lift must be equal to the size of one image on the film tape.

The film entering the apparatus through the roller 7, bends around the equalizing rollers 8.8, the passage between the spring clips 25 fixedly fixed to the lens 24, bends around the upper pressure roller 6, covers the drum A, to the surface of which there is an elastic pressure, the upper and the lower rollers, 6, are not erected by the uniform rotation of the drum A, and at the same time the carriage 1 is not erected at the same speed, so that the image in the frame must remain stationary.

To align the center of the image with the center of the lens, rotate the cam surface 19 of the roller 18, on which the circular ends of the bars 11 rest, pressed against the surface 19 by springs 22; during this rotation, the entire system rises or falls relative to the center of the lens, and the adjusting screw 28 acting on the rubber pad 13 is used to set the image in the personnel window of the device so that the higher the raised rubber is, the smaller the carriage pitch will be.

The subject of the patent.

1. A device for uniformly advancing a film without perforation in a film projector, characterized by the use of a carriage 1 attached to swing rods 3 and provided with rollers 8.8 for a G-dap film n Lrot and a chuck 2 to bring it into swinging motion by means of the ratchet teeth B on the roller, driven at the same speed with the drum A, promoting the film together with the pressure elastic rollers 6,6.

2. With the device indicated in item 1, use of a rubber plate 13 with a screw 28 installed under frame 1 in order to adjust the image in the frame window.

8. With the fixture specified in paragraph 1, use the bars 11 to support the axes 14 and 15, which bars rest with their rounded ends 20 on the cam surface 19 of the roller 18, in order to center the image of the film against the lens.