Microwave water heater

Abstract

The water heater comprises three vertically spaced sections, each of which is controlled by a separate thermostat. Water to be heated is inputted at the lowest section and travels through a circuitous path both horizontally and vertically through that section. The thermostat is set at a low value and controls microwave tubes disposed in that section for providing initial heating of the water. The water circulates to a second section which is controlled by thermostat set at a higher temperature. Structure of the second stage is identical to that of the first and causes circuitous flow of water both horizontally and vertically through that section in order to provide intimate contact of the water with microwaves emitted by second microwave tubes. A third section is also constructed in a similar manner and includes a thermostat which is set at the final desired water temperature.

Dependencies are inferred from the claim text.