Abstract: A cartridge heater and multiple thermocouple assembly comprising an elongate outer heavy walled structurally supportive metal sheath, an elongate thin walled, yieldable, orienting metal tube extending through the sheath and defining an annulus, a plurality of axially aligned pairs of thermocouple cables and spacer rods fixed to the tube in circumferential spaced parallel relationship and extending through the annulus in interfering engagement with the sheath, a resistance element extending through the tube, conductor terminals for the element accessible at one end of the tube and a filler of particulate dielectric material compacted in the tube about the element and in the annulus between the sheath, tube and adjacent pairs of cables and rods, said cables being of different lengths and having outer ends with conductors accessible at an end of the annulus and having inner ends with thermocouple junctions located at spaced points longitudinally of the sheath.

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 cartridge heater with improved thermocouple comprising a tubular metal sheath with a front end, a metal plug closing the front end, a filler of dielectric material in the sheath rearward of the plug and an elongate resistance wire supported by the filler, said plug having a pair of spaced axially extending through holes, elongate insulating tubes with front and rear ends and engaged in said holes with their front ends spaced predetermined limited distances from the open front ends of the holes, a pair of elongate thermocouple wires with front end portions engaged through the sleeves and projecting forwardly therefrom and rear portions supported in said filler and projecting rearwardly through and from the sheath and metal deposits in the forward position of the holes in the plug in sealing engagement therewith and in heat conducting contact with the thermocouple wires.

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.