SU40621A1 - Strand Tension Tester - Google Patents

Description

The predictable instrument is intended to measure the tension of the yarn during weaving and spinning processes.

Practically applied in the present; For this purpose, the instrument is based on the fact that the thread goes around three rollers, of which two rollers have fixed axles, and the axis of the third roller located at the top of the loop formed by the thread can move, overcoming the spring resistance. Thus, when changing the tension of the thread, a change in the position of this roller occurs, marked in one way or another on a graduated scale. The disadvantage of such a device is that it softens, compensates for fluctuations in the tension of the thread and, therefore, gives incorrect readings.

The proposed device does not have this disadvantage, since in it the axes of all three rollers are fixed.

In FIG. 1 and 2 depict the device in two projections.

The thread / bends around three light rollers 2, 3 l 4. The roller 3 is suspended at the end of the steel tape 5, covering the brake pulley 6 and its other end fixed at point 7. The pulley 6 is not fixed firmly on the shaft 8, but is connected with it a coil spring 9, one end of which is fixed on the shaft and the other end on the brake pulley. So

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Thus, when the shaft 8 rotates by the handle 10, the spring tensions and forces the pulley b-in rotation. A washer 11 is wedged on the same shaft 8. When the shaft is rotated, the handle 11 pulls the handle by a certain angle relative to the pulley b, and the magnitude of this angle is greater, the greater the voltage of the brake tape, i.e. in other words, the higher the tension of the thread. The eccentric 12 sector with the groove 13 is fixed on the brake pulley. At the indicated displacement of the washer 11 relative to the pulley 6, the eccentric 12 acts on the end of the bent pin 14, the axis of rotation of which is on the washer 11. The other end of this lever is connected to the slider 15 having a pointer 16 the form of a disk. The number 17 denotes the scale on which the readings of the instrument are read. Before use, the device should be predicted by hanging to the end of the thread weights of different weights and determine what division on the scale marks the pointer with a certain tension on the thread /.

The described device can be equipped with a device of the usual type for a graphic recording of indications on the tape.

The rotation of the shaft 8 can be carried out manually or by using an engine, for example, an electric motor, a clock mechanism, etc.

Readout can also be obtained using accurate electrical measuring instruments. In this case, the brake pulley 6 is rigidly fixed on the shaft 8 and the oscillations in the consumption of electrical energy per shaft rotation are measured with fluctuations in the tension of the thread /., Shchibu 7 / and the slider 15 should be discarded in this variant.

s,

Predme; g invention.

A device for measuring the tension of the thread, consisting of three rollers guiding the movement of the thread, of which the average

loaded with an indicator dynamometer, characterized by the use of a brake tape 5 with a fixed end 7, covering shchiv 6, freely mounted on a shaft 6 rotated from an independent motor, connected to said pulley with a screw spring 9 and fitted with a washer stuck on it // turning on some angle relative to the pulley depending on the degree of tension of the thread 7, which is fixed with the help of the corresponding pointer on the scale or diaphragm.

2

Fig 1

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