Potted plant feeder

Claim 1

A potted plant feeder comprising, a container, means for providing a source of water at atmospheric pressure at a level no higher than the bottom of the container, an inlet water line leading from the water source to the container at the bottom of the container, a first one-way valve in the inlet water line, an outlet water line leading from the container at the top of the container to a plant, a second one-way valve in the outlet water line, the container including means forming a cell at the bottom of the container sealed to the interior of the container and open to the exterior, an electrical heating element in said cell in heat transfer relation to water in the container, the container having a space in the construction thereof at the top of the container and a thermo switch in said space in heat sensing relation to water in the container, the thermo switch being operable for closing at a predetermined lower temperature of the water and opening at a predetermined higher temperature of the water, and electrical circuitry interconnecting the thermo switch and heating element with an electrical source and the thermo switch being thereby operable for energizing and de-energizing the heating element respectively at said lower and higher temperatures, and consequently heating the water and enabling it to cool, respectively, whereby the water when heated holds the first one-way valve closed and forces the second one-way valve open, and thereby forces a portion of itself through the outlet water line.