Patent ID: 7617725

Claim:
A protection system for an electric generator comprising: a fuel tank and a fluid sensor that includes a float to measure a fluid level in said fuel tank; a conductive block and a rod to attach the float to the conductor block and spring contacts to contact said conductive block; a set of indicator lamps receiving signals from said fluid sensor and said indicator lamps including a green LED lamp to indicate a high fluid level, a yellow LED lamp to indicate a half-full fluid level and a red LED lamp to indicate a nearly empty fluid level; an isolation wall having a port that receives said rod and that separates said spring contacts from the volume of fluid in said fuel tank; a clock timer to measure a time interval beginning in response to a low fluid signal from said fluid sensor; a low fuel switch to shut off the electric generator at the end of the time interval; an audible alarm to indicate a nearly empty fluid level; a battery pack to provide backup electric power to the protection system; a solar cell and a battery charger to recharge the batteries when an audible alarm indicates a nearly empty fuel level; a thermal sensor and a high temperature switch to shut off the electric generator in response to a high temperature signal from said thermal sensor; and a reserve fuel tank and a pump to deliver fuel to the fuel tank in response to a low fuel signal from the fluid sensor.