Magnetically driven gauge with voltage divider

Claim 1

A gauge for measuring a fluid level, comprising: (a) a base having a recess and a pivot pin extending therefrom; (b) a pointer assembly mounted on the pivot pin for rotation about an axis, the pointer assembly including a contact plate thereon, said contact plate including at least one resilient conductive arm and at least one conductive element (c) a nonconductive board positioned proximate the pointer assembly, said nonconductive board including: (i) a voltage regulator electrically connected to a first contact and to a resistive element; (ii) a resistive element formed in a semi-circular arc at a predetermined radius about said axis having first and second ends and contacted by said conductive arm at a point along said resistive element determined by the angular position of the pointer assembly relative to said first axis, said first end connected to said voltage regulator, and said second end connected to a second contact; (iii) a conductive surface being formed on the board at said axis and contacted by said conductive element; and (iv) a current amplifier connected to said conductive surface having a third contact connected to the output of said amplifier; (d) a coupler attached to said pointer assembly for moving the pointer assembly about said axis.