Article by hi joiney
Construction The Primus No. 1 stove, made of brass, consists of a fuel tank at the base, above which is a ising tube and the burner assembly. A steel top ring on which to set a pot is held above the burner by three support legs. Other Primus-style stoves may be larger or smaller, but have the same basic design. The No. 1 stove weighs about 2 pounds, and measures about 8 inches high with an overall diameter of just under 7 inches. The tank, about 3 inches high, holds a little over 2 pints of kerosene and will burn for about 4 hours on a full tank. How it Works Illustration of Burner Assembly. A: Rising tube (from fuel tank); B: Ascending tube; C: Burner head; D: Descending tube; E: Vapor nozzle. The ascending tubes and descending tubes are at right angles to one another. Primus Stove components To light the stove, the burner assembly is pre-heated with a small amount of alcohol burned in a circular pirit cup just below the burner. Once heated, the tank is pressurized by means of a small hand pump integrated into the tank, which forces the kerosene from the tank up through the rising tube (A) through the ascending pipe (B) to the pre-heated burner head (C), where the fuel is heated and vaporized. The kerosene vapor is then forced under pressure through the descending tube (D) to the vapor nozzle (E). The vaporized kerosene gas is sprayed through a jet in the middle of the burner, where it mixes with air and burns in a sootless, blue flame. Additional pumping increases the pressure in the tank and makes the flame larger; turning a small ir screw (usually located in the filler cap) will release pressure from the tank and make the flame smaller. Prior to the introduction of the Primus, kerosene stoves were constructed in the same manner as oil lamps, which use a wick to draw fuel from the tank to the burner and which produce a great deal of soot due to incomplete combustion. The Primus stove design, which uses pressure and heat to vaporize the kerosene before ignition, results in a hotter, more efficient stove that does not soot. Because it did not use a wick and did not produce soot, the Primus stove was advertised as the first ootless and ickless stove. See also Portable stove References ^ Swedish Patent No. 3944 (Nov. 19, 1892) ^ "Primus". Primus website. Primus AB. http://www.primus.se/Templates/Pages/3_cols_white_middle.aspx?SectionId=5890. Retrieved 2009-05-08. ^ Primus Catalog No. 2 (Sept. 1, 1897) ^ A. Room, ictionary of Trade Name Origins, p.142 (NTC Business Books 2d Ed. 1991) ^ R. Amundsen, he South Pole: An Account of the Norwegian Antarctic Expedition in the ram,1910-1912, Vol. 1, p.63 (Kessinger Publishing 2004) ^ L. Rose, xplorer: the life of Richard E. Byrd, p.88 (University of Missouri Press 2008) ^ R. Messner, he Second Death of George Mallory: The Enigma and Spirit of Mount Everest, p.58 (Macmillan 2002) ^ E. Hillary, iew from the Summit, p.2 (Simon & Schuster 2000) ^ H. Manning, ackpacking, One Step at a Time, p.274 (Vintage Books 1980) ^ Primus Catalog No. 17100E, p.2 (1971) ^ Primus nstructions for use Hang Tag (undated, circa 1935) ^ C. Hale, omestic Science, Part II pp.81-82 (Cambridge University Press 1916) ^ Primus Catalog No. 2, p.3 (Sept. 1, 1897) External links Primus Classic Camp Stoves Categories: Camping equipment | Cooking appliances
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