SU892482A1 - Potentiometer - Google Patents

Description

(54) POTENTIOMETER

I

The invention relates to a radio electronics tronic and can be used in object control systems.

Ring one- and multi-turn band and toroidal potentiometers are known, made in the form of a winding wound on a dielectric substrate with a contact track for current collection and an axis rigidly connected to the movable current collecting plate 1.

However, in the known potentiometers, the collector plates do not provide sufficient contact reliability.

Closest to the proposed technical entity is a potentiometer containing a resistive element, produced in the form of windings placed on a dielectric base with conductive paths and movable collector contacts 2.

The lack of a potentiometer is that the movement contacts

each in its contact track. Both tracks during the long-term storage process can equally be oxidized and contaminated, which leads to a decrease in the reliability of the potentiometric resistance.

The purpose of the invention is to increase the reliability of contact.

The goal is achieved by the fact that a potentiometer containing a resistive element, made in the form of a winding with a conductive track placed on a dielectric base, and a movable current-collecting contact, is provided with an additional co-volume that is placed 1 m in front of the main along its rotation and isolated from .

FIG. 1 shows a potentiometer with one additional contact,

20 top view; in fig. 2 - a potentiometer with two additional contacts located before and after the main contact, top view, (for

Claims (1)

The claims “Plates 10 and 11 must be insulated from the spring with the main circuit,” 2 ° if it is necessary that the additional contacts do not affect the magnitude of the signal picked up by the main contact. In the process of operation of the potentiometer, the axis ²⁵ 4 rotates the spring 6 with contacts 7-9, which move along the contact track 2 of the winding I of the potentiometer. In this case, oxides and pollution products are removed from the contact track. 30 2 by additional contact 8, and if there are two additional contacts, by contact 8 or 9, depending on which direction the axis 4 rotates. FIG. I A potentiometer comprising a resistive element arranged in a dielectric base placed on winding wiring, a collector and a movable contact, the difference _of ayuschiysya in that, to improve the reliability of contact, it is provided with an auxiliary contact disposed before the main downstream of it. rotation and isolated from it.