Variable resistor for mounting on surface

Details Variable resistor for mounting on surface Variable resistor for mounting on surface

1988-05-16

1989-04-11

Albritton, C. L.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338174, 338202, H01C 1032

Patent

active

048210145

ABSTRACT:
A variable resistor whose resistance is adjustable by rotating a rotor relative to an insulating substrate defining an arcuate resistive element. The rotor is formed of an insulating resin and includes an inner skirt and an outer skirt extending from a bottom surface thereof. The inner skirt contacts a surface position of the insulating substrate inwardly of the arcuate resistive element and the outer skirt outwardly thereof. A metallic slider is integrated with the rotor by insert molding. The slider comprises a base portion formed of at least two overlapping metal plates, and arms defining contacts at distal ends thereof for slidable contact with the resistive element on the insulating substrate. The arms are folded along lines parallel to a straight line extending through the contacts at the ends thereof and the center of the insulating substrate to cause the contacts to project toward the substrate. One of the metal plates forming the base portion cooperates with inner and outer skirts of the rotor to seal a space accommodating the resistive element and the arms of the slider.

REFERENCES:
patent: 3617978 (1971-11-01), Gerstmeier
patent: 4511879 (1985-04-01), Fujii
patent: 4521761 (1985-06-01), Welch

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