FireDOC Search

displaying 1 - 5 results in total 5

• Hjelmstad, K. E.; Pomroy, W. H.
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  Electromagnetic Fire Warning System for Underground Mines.
  Bureau of Mines, Minneapolis, MN
  IC 9206,
  U.S. Department of the Interior, Bureau of Mines. Recent Developments in Metal and Nonmetal Mine Fire Protection. Bureau of Mines Technology Transfer Seminars. IC 9206. October 18-19; October 20-21; November 1-2; and November 3-4, 1988, Denver, CO; Detroit, MI; Las Vegas, NV; and Spokane, WA, 78-82 p., 1988

• Reimers, G. W.; Hjelmstad, K. E.
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  Analysis of the Oxidation of Chalcopyrite, Chalcocite, Galena, Pyrrhotite, Marcasite, and Arsenopyrite.
  Bureau of Mines, Pittsburgh, PA
  RI 9118, 1987, 23 p.

• Hjelmstad, K. E.
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  Electromagnetic Fire Warning System for Underground Mines. Patent Application.
  Bureau of Mines, Minneapolis, MN
  PAT-APPL-7-201-235, May 2, 1988, 14 p.

• Hjelmstad, K. E.; Pomroy, W. H.
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  Novel Fire Warning System for Underground Mines.
  Bureau of Mines, Minneapolis, MN
  Mining Engineering, Vol. 42, No. 1, 107-112, January 1990

• Hjelmstad, K. E.; Pomroy, W. H.
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  Ultra Low Frequency Electromagnetic Fire Alarm System for Underground Mines.
  Bureau of Mines, Minneapolis, MN
  RI 9377, 1991, 15 p.