SU492486A1 - Device for measuring the transverse electrical resistance of fibrous dielectric materials - Google Patents

Description

flat electrodes of the measuring cell are rigidly connected to the movable rod 8, sliding along the guide 9 attached by means of the bracket 10 to the base 6. On the guide 9 there is an indicator 11 of the hour type, the indications of which determine the thickness of the sample 12 compressed with using a weight of 13. The screw 14 is designed to hold the movable electrode 2 in the upper position. FIG. 2 shows a system of measuring electrodes 5, made in the form of a rectangular beam, two opposite; the planes of which form measuring 15 and concentric 16 guard electrodes installed. The measuring electrode 15 is attached to the guard electrode: dU 16 with metal bolts 17, included in insulators 18, made of high-quality electrically insulating material and installed in the recesses of all non-working faces of the measuring electrode 15. A sample of a continuous filament 12, whose electrical resistance should be measured using a special winding machine equipped with an electric drive, mechanism, pickup of the thread and a rev counter (not shown in the drawing), wound in one or several layers s on the electrode system 5 with a small yarn tension ensuring uniform their layout. To place the prepared sample in the interelectro 11OI zone of the measuring cell, the movable electrode 2 is lifted and using screw 14, remove the jy in the upper position. A system of electrodes 5 with a test plane 12 wound around them in a required amount is laid on a stationary high-voltage electrode 1 and a movable electrode 2 is pressed to a different working plane after the screw 14 is released. According to the indications of indicator 11 O1, the thickness sample. The device is placed in a measuring chamber, which functions as an electrostatic screen; and electrodes 1,2,15,16 are connected to a measuring device, according to which the specific transverse t electrical resistance of textile yarns is determined. The subject invention was invented by a device for measuring transverse. Electrical resistivity of fibrous dielectric materials containing a measuring cell and high-voltage, measuring and guard electrodes, characterized in that, in order to increase the sensitivity of the measurement, reduce the structural dimensions of the measuring electrode, | it is equipped with a second high-voltage electrode, and the measuring and guard electrodes are interconnected with insulators installed in a measuring electrode (nominal electrode) and placed between the high voltage electrodes attached.

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