SU113416A1 - Linear stepless potentiometer - Google Patents

Description

The proposed linear stepless potentiometer is of the type of potentiometer with a wire electrical resistance, laid in a helical groove made on the outer surface of a stationary drum, and with a movable contact mounted on a rotary potentiometer system and sliding along a wire resistance.

The peculiarity of the proposed potentiometer is that its movable contact is immersed (recessed) in a screw groove and loosely seated on a guide rod fixed in the rotary system of the potentiometer along the generator of the drum.

With such a design, the screw groove potentiometer is used to guide the movable contact through the resistance wire, i.e., around and along the drum at the same time, which reduces the resistance moment, simplifies the design and improves the reliability of the proposed linear stepless potentiometer.

The drawing shows the proposed potentiometer in a perspective view.

The potentiometer consists of a fixed insulating drum / with a helical groove on the outer surface and of a light moving system 2 mounted on ball bearings, providing a small moment of movement and low inertia of the potentiometer. The movable contact 3, having the form of a sharp roller, which enters the helical groove with its side, is freely seated on the guide rod 4 fixed in the frame 5 of the rotary system 2. The frame 5 together with the guide rod 4 is pressed against the drum by a flat spring 6 under the action which the contact 3 enters into the groove on the surface of the drum and presses the wire in it. When the moving system 2 rotates, the contact 3 is guided by a helical groove and slides along the wire, moving simultaneously around and along the drum.

Subject invention

Linear stepless potentiometer with electrical resistance in the form of wire, laid in a helical groove made on the outside. the fixed drum surface and with a movable contact mounted on a rotary potentiometer system and sliding on a wire of resistance, characterized in that, in order to reduce the moment of resistance, simplify the design and increase reliability, the movable contact is immersed (recessed) in the specified helical groove used for guiding it along a wire of resistance, i.e., simultaneously around and along the drum, for which this contact is freely seated on a guide rod fixed in a rotating system of potential iometra along the forming drum.