SU60341A1 - Device for obtaining two different speeds of rotation of tape mechanisms in recording devices - Google Patents

Description

In the recording measuring devices used for continuous recording of electrical quantities and operating modes of various electrical installations, usually the speed of movement of the chart tape is small. However, this speed is quite sufficient to register slow processes (changes in load, voltage, etc.) occurring in the power system during steady state operation.

However, when accidents occur in the electrical network or the correct mode of operation is violated, low write speeds are no longer sufficient.

Recording devices are known in which the recording speed, in other words, the speed of movement of the chart tape automatically increases at the moment the normal operation of the monitored installation is disrupted.

The proposed device according to the invention for the same purpose is characterized by the use of an additional source of motion of increased speed, which automatically comes into effect at the time of the accident. Its inclusion is carried out at

the help of the minimum or maximum relay triggered when the normal operation of the installation changes.

The drawing shows schematically the proposed device.

It consists of two main parts: the clockwork 8 and the electric motor 9, for example, the type of synchronous engine Varren. The clock mechanism runs continuously, while the synchronous motor is turned on only for the duration of the accident.

In the event of an emergency condition of the system, the flow of processes is significantly accelerated; therefore, to be able to record them, it is necessary to significantly (1000 times or more) speed up the movement of the tape.

As the emergency mode passes, the tape speed must again decrease to normal.

The axis / on which the tape drive wheel 2 is mounted is terminated by a gear wheel 5, to which the ratchet wheel 4, which is rigidly mounted on the axis 5, directly adjoins; a gear wheel 6 is mounted on the other end of the same axis 5.

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Movement from axis 5 to axis 1 is transmitted by means of a pawl 7 mounted on a gear wheel 3 and a ratchet wheel 4.

The gear wheel 6 is coupled with the gear wheel 10, which is mounted directly on the axis of the synchronous motor 9.

The gear 3 is further coupled with the wheel 11, which rotates freely on the axis 12. The movement from the axis 12 to the wheel 11 is transmitted by the clutch of the ratchet 13 with the pawl 14 rigidly mounted on the gear.

The mechanism works as follows.

At usual times, the tape moves from the clockwork 8. The latter rotates the ratchet wheel 13, and from the latter, the dog 14 and the gear wheel 3 rotate the tape drive wheel 2.

In this case, the movement of the gear 3 takes place as shown by the flat arrow. Therefore, the dog 7 slides on the ratchet wheel 4, not clinging to it, and the axis 5 is stationary.

Upon the occurrence of emergency mode, the rotor of the Varren engine 9 instantaneously comes into rotation, gear 10 spins and gear 6 coupled to it, which sits on axis 5.

Since the rotation of the axis 5 in this case occurs along the dotted arrow, the Toxi wheel 4 engages the dog 7 and causes the rotation of the wheel of the tape mechanism 2, which at the same time carries out a rapid movement of the tape. The gear 11 then rotates.

and the doggie 14 freely slides along the ratchet wheel 13 without engaging it.

At the end of the emergency mode, the synchronous motor 9 is automatically turned off, and the tape is again moved by the clock mechanism.

Subject invention

1. A device for obtaining two different rotational speeds of tape mechanisms in recording devices, driven by a clock and other mechanisms, characterized by the use of an additional source of movement, for example, by the type of Varren electric motor, the axis of which is connected to the main axis of the tape mechanism using ratchet wheel, with the intention that the automatic coupling of the main axis to the Varren engine occurs when the latter comes into rotation with a speed exceeding nd normal speed of motion of the deck.

2. The form of making the device according to claim 1 as applied to the recording of accidents in electrical networks, characterized in that, in order to automatically increase the speed of the tape drive mechanism at the time of the occurrence of the accident, the Warren engine is connected to a controlled network using a corresponding relay designed to close the engine circuit at the moment of breaking the normal mode of the controlled network.