Abstract: A nebulizer for uniformly tempering and humidifying oxygen and different predetermined mixtures of oxygen-enriched air comprising a vessel containing a volume of water, oxygen supply means delivering oxygen into the vessel, air supply means conducting air into the vessel, and electric resistance heater means to heat the water in the vessel, said air supply and heater means including adjustable air metering means with a movable control part and said electric heater means including an adjustable control unit with a movable part, drive means connected with and between said movable parts whereby movement of one of said control parts results in predetermined corresponding movement of the other control part, whereby changes in the volume of air conducted into the vessel by said metering means results in predetermined corresponding heat output by the metering means and resulting tempering of the water.

Abstract: A humidifying and tempering apparatus for use in an oxygen delivery system and comprising a vessel, a supply of water in the vessel, a nebulizer in the vessel above the water, a supply of oxygen under pressure connected with the nebulizer, an elongate water conducting tube connected with the nebulizer and extending downwardly into and through the water, an elongate resistance heater element concentric within and extending longitudinally of the tube to heat that water drawn through the tube by the nebulizer to be mixed with the oxygen in the upper portion of the vessel and an oxygen delivery line communicating with the vessel above the water and conducting tempered humidified oxygen to a location for use.