SU1561063A1 - Mechanism for intermittent movement of perforated band - Google Patents

Abstract

The invention relates to motion picture technology and allows you to expand the operational capabilities of mechanisms for intermittent movement of apertured tape. On the shaft 1 of the main Maltese cross 3, which interacts with the eccentric 6, there is a rotary disk 4 through which the shaft 7 of the eccentric 6 passes, connected to the drive through the gear wheel 8. The additional Maltese cross 11 with the contacting additional eccentric 15 is mounted on the supporting disk 14. When using a copy with a four perforated frame, the eccentric 6 receives rotation from the pinion 9 of the drive. When using a three-perforated film copy, the additional eccentric 15 receives rotation from the drive when the clutch 19 is turned. Rotating the additional Maltese cross 11 causes the disc 4 to turn through gears 5.12 by the angle determined by the reduction gear ratio. The disk 4 moves the shaft 7, which leads to the rotation of the eccentric 6 around the shaft 1 of the Maltese cross 3 in the opposite direction, and the angle of rotation of the jump gear drum 2 will be reduced. 1 il.

Description

The invention relates to film technology, specifically to devices for pulling films in projection apparatus.

The drawing shows a diagram of the mechanism for intermittent movement of a perforated tape.

Shaft jump drum 2, Maltese cross 3 and rotary disk 4 with gear wheel 5 fixed on it are mounted on shaft 1. The Maltese cross 3 is in contact with the main eccentric 6, which is located on shaft 7 mounted on the rotary disk 4 and passing through it. A gear wheel 8 is also mounted on the shaft 7, which is engaged with the gear wheel 9 located on the shaft 10 of the drive mechanism “Additional Maltese cross 11 and the gear wheel 12 (transmission link) which is in engagement with the gear wheel 5, are located on the shaft 13 rotating in the bearing of the supporting disk 14. Additional Maltese cross 11 is in contact with an additional eccentric 15, which is mounted on the shaft 16, also rotating in the bearing of the supporting disk 14 On the shaft 16 there is a gear wheel 17 The gear meshes with the gear wheel 18. The gear wheel 18 is located coaxially with the gear wheel 9 and is connected to the shaft 10 of the drive mechanism through the coupling 19. The shaft 1 and the bearing disc 14 are rigidly fixed on the body of the apparatus (not shown).

The device works as follows.

When using a copy with a 4-perforated frame, the main eccentric 6 with a finger, the shaft 7 of which passes through the rotary disk 4, receives rotation from a common drive mechanism (not shown) through the gears 8 and 12. With one turn of the eccentric 6 main - The Tyya cross 3 rotates 90, which corresponds to the movement of 35 mm films on four perforations by means of a jerky gear drum 2 with sixteen teeth rigidly fixed on the shaft 1 of the main Maltese cross 3. In this case the coupling sleeve 19 times whip and does not transmit rotation from when

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5 Q

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water mechanism to an additional eccentric 15.

In case of using a copy with a 3-perforated frame pitch, coupling 19 must be connected. The shaft 16 of the additional eccentric 15 receives rotation from the drive mechanism through the coupling 19 and gear wheels 18, while the additional 15 and main 6 eccentrics rotate around their axes 16 and 7 in phase. Rotating the additional Maltese cross 11 causes the disc 4 to rotate through the gears 5 and 12 by an angle determined by the reduction gear ratio, which is selected depending on the desired change in the pitch of the perforated carrier. The disk 4 rotates around its own axis together with the shaft 7 passing through it, which causes the eccentric 6 to rotate around the shaft 1 of the main Maltese cross 3. The direction of rotation of the disk 4 depends on whether it is necessary to increase or decrease the pitch of the film relative to the base step. As the pitch is increased, the indicated turn should take place in the same direction in which the Maltese crosses 3 and 11 rotate in phase, and in this case the angle of rotation of the jump gear drum 2 will be increased. When reducing the pitch, the rotation should occur in the opposite direction, the angle of rotation of the jump gear drum 2 will be reduced.

The direction of rotation of the disk 4 relative to the direction of rotation of both Maltese crosses 3 and 11 is determined by the nature of the gearing of gear wheels 5 and 12 in the transmission link, for example, if it is necessary to change from four to three grades, the disk 4 must rotate in the direction opposite to the rotation of Maltese crosses 3 and 11, at 22.5. This is accomplished with a pair of gear wheels 5 and 12 with internal gearing, as shown in the drawing, and a gear ratio of 4 "

The increase in the pitch of the film as compared with the base one, for example, from four to six perforation corresponds to the external gearing of the gear wheels 5 and 12 in the transmission link (not shown), and to the decrease in the pitch compared to the base gear,

measures, when switching from four to three perforated frame steps, internal gearing of gears 5 and 12 corresponds to the interlocking movement of film copies with more than two different frame steps if necessary, the transmission link should be made in the form of a corresponding stepped gearbox providing the required gear ratios from additional maltese cross 1 1 to turntable 4 and turn direction of disk 4 "

Claims (1)

Invention Formula A mechanism for intermittent movement of a perforated belt containing a gear drum placed in a housing located on a Maltese cross vapa interacting mounted on an axis associated with a drive, eccentric with a finger, and placed on a Maltese cross wapa swivel disk with a gear fixed on it coaxially, about t-fn and due to the fact that, in order to expand its operational capabilities, it is equipped with an additional Maltese cross and an eccentric with a finger, the axes of which are placed on the inserted supporting disc mounted on the housing, with the additional eccentric connected through the inserted coupling with the drive, and the additional Maltese the cue cross is connected through a kinematic link with a gear wheel, the axis of the main Q eccentric located on the swivel disk.