초록

A portable method and apparatus for allowing an individual to pre-adjust at sea level for future high altitudes is taught. The invention teaches the use of a small portable breathing gas control system to adjust the gas concentrations going to a subject's facemask.

대표청구항 ▼

A portable method and apparatus for allowing an individual to pre-adjust at sea level for future high altitudes is taught. The invention teaches the use of a small portable breathing gas control system to adjust the gas concentrations going to a subject's facemask. secondary flame outlets. 10. An ap

A portable method and apparatus for allowing an individual to pre-adjust at sea level for future high altitudes is taught. The invention teaches the use of a small portable breathing gas control system to adjust the gas concentrations going to a subject's facemask. secondary flame outlets. 10. An apparatus according to claim 9, wherein a flame guide for adjusting the initial angular direction of the flame leaving the burner is provided within said flame outlet. 11. A water vessel for water boiling or hot steam generation including a peripheral wall, said water vessel including a combustible gas inlet and an exhaust gas outlet disposed on said peripheral wall of said water vessel, said gas inlet and said gas outlet being interconnected by a flue pipe which is adapted to be fully submerged in the water inside the water vessel during normal operation, wherein a portion of the flue pipe adjacent to the gas inlet is elevated from the bottom of said water vessel so that, during operation, the space between that portion of said flue pipe and the bottom of said water vessel is filled with water, and a gas burner including a flame outlet having an aperture which is partitioned into 3 parts, the relative area of said 3 parts being adjustable to provide a main flame outlet and secondary flame outlets. 12. A water vessel according to claim 11, wherein said combustible gas inlet of said flue pipe is retracted from the outmost edge of said peripheral wall. 13. A water vessel according to claim 11, wherein the path of said flue pipe is convoluted. 14. A water vessel according to claim 11, wherein said flue pipe includes at least an obtuse bend. 15. A water vessel according to claim 11, wherein said flue pipe includes a plurality of substantially 180-degree bends or adjacent 90-degree bends.