SU1500976A1 - Cine film transport speed stabilizer - Google Patents

Abstract

The invention relates to motion picture technology and makes it possible to increase the reliability of a device intended to stabilize the speed of movement of a film. The stabilizer contains a smooth drum 1 fixed to the shaft 2 on which the crankcase 5 is installed with the flywheel 7 placed inside it, the space between which is filled with the electric fluid 8, the voltage to which from the power source is applied through the sliding contacts 17, 18. Controlled electrically viscous fluid 8 changes its viscosity and, therefore, the adhesion between the crankcase 5 and the flywheel 7, which automatically changes the rotating mass on the shaft 2 and leads to a change in the moment of inertia of the flywheel 7. Thus, the drum element 1 is protected from a source of variable forces acting on the film being pulled through it. 2 Il.

Description

This invention relates to a film technician, namely to nodes of a tape-carrying mechanism.

The purpose of the invention is to increase the saturation of the stabilizer.

Fig, 1 and 2 shows the scheme of the proposed stabilizer.

The stabilizer contains a smooth drum 1 mounted on shaft 2, Q rotating in bearings 3 in housing 4. Shaft 5 is fixed to crankcase 5, inside of which flywheel 7 is placed on bearing 6. The clearance between crankcase 5 and flywheel 7 is 0.2-0, 5 mm, 15 and the entire space between them is filled with electrically liquid 8. Karer 5 is mounted on the shaft 2 through the sealing pads 9.

The stabilizer also contains a symmetrical supply device (source). 10 direct current, a rheostat 11 is connected to the output, the sliding slider 12 of which is kinematically connected with the lever 13 of the podrugi-25 removable roller 14, placed between the sonic drum 15, which is the source of the variable speed of the film 16 and the element to be stabilized - smooth 30 The drum 1. Between the movable slider 12 of the rheostat 11 and the symmetrical terminals a and b, the power source 10 is connected via the sliding contacts 17 and 18 of the crankcase 5 and the flywheel 7 to control the voltage of the electrically fluid B and its viscosity.

The stabilizer works as follows.

At the beginning of the stabilizer (apparatus) start-up, the sonic drum 15, transporting the film 16 in the sound of the film projector, sets it in motion. Since the smooth drum 1 with the flywheel 7 and the crankcase 5 is stationary, due to the tension of the film 16, which causes them to rotate, the lever 13 with the roller 14 deviates from the average position (at the initial moment when charging). films 16, the flexibility of the spring 19 of the lever 13 is chosen such that the lever 13 is at an average position and the voltage taken from the slider 12 of the rheostat 11 relative to the midpoint of the source 10 of the power supply 55 is zero). When the lever 13 is deflected with the roller 14, the voltage on the electric fluid 8 is slowly

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increases, as a result of which, its viscosity increases, which leads to an increase in adhesion between the crankcase 5 and the flywheel 7 and to their smooth start.

During the operation of the stabilizer, due to the inconsistency of the rotational speed of the electric motor, the winder of the toothed drum drive, etc., the speed of movement of the film 16 varies. Consequently, depending on the magnitude of the disturbances, the position of the spring-loaded lever 13 with the roller 14 installed between the sonic toothed drum 15 and the element to be stabilized, smooth drum 1, and the magnitude of the voltage, and hence the viscosity of the liquid 8 and, as a result, flywheel 7 clutch with crankcase 5. Thus, if there are opportunities, the speed change of the film 16 will be obstructed by the increased friction between the constant-speed massive flywheel

7 and an oscillating crankcase 5, rigidly connected with smooth drum 1 and moving film 16. Such an automatic increase in the rotating mass will reliably protect the stabilized element — smooth drum 1 from a variable speed source.

The increase in the mass rotating together also leads to an increase in the moment of inertia of the flywheel 7 and to the protection of their stabilized element - a smooth drum 1 from the source of alternating forces,

When the stabilizer (apparatus) stops, the tension of the film 16 decreases, the lever 13 with the roller 14 returns to its original position, and the voltage applied to the electrofluid

8 is zero. Consequently, the massive crankcase 5 rotates by inertia, slightly engaging with the flywheel 7, and the tape 16, driven by the toothed drum 15, stops, resulting in a rotating smooth drum 1 without the crankcase 5. will create a slight dynamic load on the film 16,

Claims (1)

Invention Formula A film speed stabilizer containing a smooth drum mounted on one end of the shaft, on the other end of which is installed a crankcase with a flywheel placed in it and a melody which is filled with a viscous fluid, as well as a toothed drum that differs in reliability, it is equipped with a roller located between a gear and a smooth drum, mounted on a spring-loaded lever, kinematically connected with a slider, the extreme resistor, the middle terminal of the inserted power supply connected to the positive terminal, and the extreme leads — to the symmetrically dissociated relatively positive adhesive — we use its negative terminals; the crankcase is electrically connected to the rheostat slider, the flywheel is connected to the negative power supply terminals, and The viscous fluid is electrically conductive. nineteen ten d} ia2