Variable resistor having clutch mechanism

Details Variable resistor having clutch mechanism Variable resistor having clutch mechanism

1995-09-21

1997-12-16

Walberg, Teresa J.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338DIG1, 338167, 338180, 338182, 338190, H01C 1032

Patent

active

056990375

ABSTRACT:
A variable resistor comprises a slider body, a contact arm which is provided to project from the slider body, a contact part which is formed by bending the contact arm, an arcuate spring arm having a projection for engaging with an engaging portion of a rotor gear, and a stopper which is formed by bending a stopper member provided to project from the slider body. The arcuate spring arm has an inboard structure connected with the slider body at both ends thereof. The projection engages with the engaging portion of the rotor gear, so that the slider body is rotated following rotation of the rotor gear. When the rotor gear is further rotated in such a state that the stopper comes into contact with a case side stopper which is formed on a case thereby inhibiting the slider body from rotation, the engagement between the engaging portion and the projection is released. Thus, the slider body is prevented from overrotation.

REFERENCES:
patent: 3124777 (1964-03-01), Mellor
patent: 3399367 (1968-08-01), Tumbusch
patent: 3522573 (1970-08-01), Michik
patent: 3617977 (1971-11-01), Scheiterbauer et al.
patent: 3683308 (1972-08-01), Hamill
patent: 4004264 (1977-01-01), Hogue et al.
patent: 4042902 (1977-08-01), Meyer et al.
patent: 5047746 (1991-09-01), Stilwell et al.

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