SU9347A1 - Cinema Projection Machine - Google Patents

Description

In the proposed cinematographic projection apparatus, an eight-beam Maltese screen is used for smoothly grabbing the tape, a cylindrical obturator used to reduce flicker, and a fixed window designed to facilitate control of the flashlight, and a special button connected to adjust the tape in the frame. with the mechanism of the Maltese cross. The device has a drive with five gear wheels located in one plane.

In FIG. 1 shows the view of the apparatus from the handle; FIG. 2 is the same from the side of the door; . 3 is the same, in vertical section; FIG. 4 is the same, view from the side of the objective board; FIG. 5- obturator, in longitudinal section; FIG. 5 is the same; in cross section; FIG. b-Maltese cross and adjacent parts in a vertical section; FIG. 7 - pressure roller in vertical section; FIG. 8-front door view; FIG. 8 is the same, in vertical section.

The device of the apparatus is as follows. The frame of the device (Fig. 1, 2, 3, 4) consists of four parts: the main rack A with the sole E,

side panel B, objective board C and wall L fixed on the table, fastened together by screws 6, 7, 8 and 9 on the lens board and screws 10, 11, 12 and 13 on the wall J7 of the door. The main A-pillar is equipped with tidal ribs 14, 16 and 18 (Figures 1, 2, 3 and 4), which serve to impart stability to the Apparatus. Tide 14 (Fig. 3) is located under the bearing 15 of the roller 1 of the hand drive (from the gear side); an inclined tide 16 starts from the bearing 17 (Fig. 6) of the axis 3 of the friction button, and the tide 18 (Fig. 4) is located against the tide 16 on the opposite side of the rack D. The second bearing of the axis 1 (Fig. 3) of the hand drive is supported by the bracket 19, screws 20 and 21 attached to the main A-pillar (figs 1, 2, 3). The axis 3 of the friction knob and the axis 23 of the Malti Cross (Fig. 6) are directed in one direction from the coupling point, which results in a compact apparatus. The vertical drum 58 (FIG. 2) has twenty teeth, and the lower drum 70 and the drum 22 of the Maltese cross each have thirty-two teeth. The Maltese Cross 23 (Fig. 1) has eight rays. With increased diameter

The eight-beam Maltese cross 23, the friction button 3 (Fig. 6), has to be made much smaller in diameter.

The obturator 24 (Fig. 5) is placed inside the housing of the apparatus between the window and the lens and represents a hollow cylinder having on the circumference two diametrically opposite slits 25 and 26 intended for the passage of light rays. When the obturator rotates, the edges 25 and 26 of its notches open and close the beam, simultaneously from above and below. The obturator 24 has separate semi-axes 4-4, fixedly supported in disks 97, 98, onto which a hollow cylinder with slots 25 and 26 is fitted and fixed.

The coincidence of the frame boundaries with the edges of the fixed cover 88 (Fig. 8) is achieved by rotating the drum 22 (Fig. 6) on its axis 23 by means of a button 27 which rotates the hand to one side or the other and pushes or pushes the core into the hollow axis 23 of the Maltese cross 28 with a screw 29 screwed into it. The middle one passes through the slot 30 on the axis 23 and through the slot on the drum 22, Cuts 30 and 31, the width of which is equal to the thickness of the screw 29, are located along a steep helix, with the opposite directions. Thus, the insertion of the strut 28 acts through the screw 29 simultaneously on the axis 23 and on the drum 22 of the Maltese cross, causing them to rotate in opposite directions. The limit of rotation of the drum 22 with respect to the axis 23 pushes, the height of the frame on the film,. E. Four prongs on the reel 22. In this way, moving rod of 28 over the entire length of slots 30 and 1, causes the film to move in the height of one frame. The pushing and pushing of the rod 28 is carried out with the help of a round button 27, which has, for convenience of convenience, a rolled bead 32. The button 27 is put on the protrusion 33

covers 34 boxes 35 maltese cross. Hollow protrusion 33 has two diametrically opposed axial slits 36 and a grooved groove 37. In collar 32: buttons 27, three screws 38 are equally spaced so that their 38 ends fit into groove 37, not allowing button 27 to fall off the protrusion 33 covers 34 .. The same screws 38 adjust, by pressing on the protrusion 33, the smoothness of the rotation of the button 27 and prevent it from spontaneously turning on the protrusion 33. On the inner surface of the button 27 there is a ribbon thread with a large pitch. At the end of the rod 28 having a shoulder 39, the cross member 40 is movably mounted together with the screw 41 holding it and the washer 42. The cross member 40 is inserted into the tape thread of the button 27 and into the longitudinal slots 36 of the protrusion 33 of the cover 34 of the Maltese cross box. Turning the button 27, protected from share movement with screws 38, with its two screw passages produces fractional movement of the cross member 40 by grooves 36 of the protrusion 33 and carries the rod 28, which, by means of the screw 29, turns the drum of the Maltese cross on its axis 23. Thus, the rod 28, thanks to the screw 29 ,. rotates when the machine is working together with the axis 23 and the drum 22 of the Maltese cross, while the cross member 40 is stationary. The Maltese cross itself is protected from shared movement by a washer 23 with a through stud passing through the washer and axle.

The pressure rollers 43 (Fig. 7) with the upper and lower drums 5b and 70 (Fig. 2) are mounted on studs 71, 72 and are held in position by a spring 44 and a stand 45 fixed in tides of the main rack A. roller screwed handle 51.

The usual type of door 73 (Fig. 1 880 is provided with an insert 74 which presses the tape to the window. The insert 74 is fixed in the corresponding slot of the door 73 and held by the bars 75 and 76. The bars 75, 76 pass through the common cover 77 of the door in the oblong holes 78, 79, after installation, in which the washers 80, 81 are fastened to the rods, fixed by the caps 82 and 83. The general cover 77 of the door is screwed to the door 73 by four screws 84, 85, 86 and 87. A personnel cut is cut into the cover 77 window 88. In order to press the film to the window, the insert 74 has a slide 52, screwed to the Application screws 89, 90, 91, 92. The slider 52 extended downward and bend around a quarter of the circumference of the drum 22 of a Maltese cross. Pruzhinki 53 and 54 are pressed to the insertion hole 74, a spring 55 and lifts it upward, providing the frame with lroektsii immobility.

The bearing 56 (FIG. 3) of the upper drum 58 is a sleeve screwed to the main stand A with three screws 57. Due to the elongated shape of the sleeve 56, the drum 58 does not have a second bearing. The bearings of the axis 23 of the Maltese cross have eccentric holes, thus achieving the ability to adjust the Maltese cross by pushing it to the axis 3 of the friction button. Bearings 59 are kept from turning in their seats by means of studs 60 and 61. All bearings of the apparatus have a round shape and are inserted into the corresponding slots in rack A and wall B.

The transmission axis 2 (fig. 1,3,4) is reinforced in the hollow of the pillar A with a screw 93, while the axis 2 is turned in its socket by a pin 94. A gear wheel is attached to the long end of the axis 2, which is fastened with a washer 95 screwed by a screw 96. The gears of the axes 1, 3, 4, 5 rotate together with the axles and are fastened to them through the studs. Gear on axis 1 of the hand drive has one hundred forty four

teeth, gear on the transmission axis of 2-devos teeth, gear on the axis 3 of the friction button-g eighteen teeth, gear on the axis 4 of the obturator-twelve teeth and gear on the axis 5 of the upper drum - ninety teeth. All five gears of gear wheels are located in one plane.

To actuate the device by hand, there is a handle 62 (Fig. 4) that is worn on axle 1. To attach a film projector to the motor, on the axis 3 of the friction button there is a pulley 63 (Fig. 2), mounted on the sharpening of the flywheel 64. The handwheel 64 is mounted on the serrated bushing, and the latter is mounted on the axle 3. The winding of the tape shown on the jigsaw is produced by an endless belt, driven by a pulley 66 (Fig. 4), mounted on axle 1.

The course of the film in the apparatus is shown in FIG. 1 line 67; the top loop is labeled 68, and the lower loop is 69.

The subject of the patent.

1. A cinematographic projection apparatus, differing in cumulative use: a) an eight-beam Maltese cross 23 (Fig. 1.6) mounted on a reel 22 with thirty-two teeth; b) an obturator 24 (FIG. 5) in the form of a hollow cylinder, provided with two cuts 25 and 26 and installed inside the apparatus on semi-axes 4-4, fixedly fixed in disks 97.98; c) a door 73, provided with a fixed window 88 (Fig. 8, 8) and for inserting a film to the window with an insert 74, equipped with a slide 52, enveloping a quarter of the circumference of the drum 22, and springs 53, 54 and 55; d) devices for aligning the frame boundaries with the edges of the fixed window consisting (Fig. 6) of the button 27 on the box 35 of the Maltese cross, equipped with a rod 28 with a screw 29,

passing through the slots 30 and 31 in the axis 23 and in the drum 22, and the cross bars 40 with the screw 41 and the washer 42, and e) the pressure rollers 43 (Figs 2, 4, 7) with the handle 51 mounted on the studs 71 72, and

coasters 45 with springs 44 for holding rollers 43.

2. Application for the drive apparatus specified in clause 1 with five gear wheels located in one plane.

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