公开(公告)号：US3631372A

公开(公告)日：1971-12-28

申请号：US3631372D

申请日：1970-06-12

Applicant: VICTOR COMPANY OF JAPAN

Inventor： YAMAMURA TAKASHI

IPC: H01C10/40 ,  H01C9/02

CPC classification number: H01C10/40

Abstract: A variable resistor comprises a rotatable screw shaft having a screw on the outer periphery thereof, a resistor disposed in parallel with the screw shaft, a movable member formed of a bent leaf spring of electroconductive metal, and a movable member holder through which the screw shaft passes. The movable member holder holds the movable member. The movable member has at one end thereof a slidable contact portion contacting with the resistor. The other end of the movable member contacts with the portions of the grooves of the screw having the effective screw diameter. The movable member also has a protuberant middle portion contacting with adjacent crests of the screw. The edge line of the other end of the movable member has an inclination angle with respect to a vertical plane to the axis of the screw shaft, which angle is reverse in direction to the lead angle of the screw and substantially equal to the lead angle in absolute value.