A fuel level sender (10) utilized a float (14) pivotally connected to a resistive rheostat (20) for varying a measurement signal in response to pivotal movement of the float (14) and therefore level of liquid in a container (12). The rheostat (20) includes an arcuate card helically wound by a conductive...http://www.google.com/patents/US5216919?utm_source=gb-gplus-sharePatent US5216919 - Fuel level sender
