electrical plug for a standard AC-plug housing that monitors the power line for voltage and current spikes or variations in voltage or electric current and records changes in the line, namely, the elapsed time of usage, maximum and minimum line voltage, and maximum current draw, and reads back the data to a personal computer through a user interface, for the purpose of monitoring energy consumption or to determine wear and tear on power tools; computer software for use in converting data from electrical plug, which monitors the current and voltage variations, to a computer readable and displayable form
Electrical and Scientific Apparatus