Permissible Electric Mine Lamps.
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Permissible Electric Mine Lamps.

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Published by s.n in S.l .
Written in English

Book details:

Edition Notes


SeriesReport of investigations (United States. Bureau of Mines) -- 3304
ContributionsIsley, L.C., Hooker, A.B.
ID Numbers
Open LibraryOL21750046M

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Get this from a library! Investigations of permissible electric mine lamps, [L C Ilsley; A B Hooker; William H Roadstrum] Abstract. Includes head of title: U.S. Department of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner, of access: Internet Permissible Electric Mine Lamps (Supplement to Bulletin ) Page: 3 11 p.: ill. ; 27 cm. This report is part of the collection entitled: Technical Report Archive and Image Library and was provided to UNT Digital Library by the UNT Libraries Government Documents ://://metadc/m1/5. Investigations of permissible electric mine lamps, / By Etats-Unis. Mines (Bureau) aut, W. H. aut Roadstrum, A. B. aut Hooker and L. C. aut Ilsley. Abstract. United States department of the Interior. Bureau of mines. Bulletin Mode of access: Internet Publisher:

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus : miners lamps Select Your Cookie Preferences We use cookies and similar tools to enhance your shopping experience, to provide our services, understand how customers use our services so we can make improvements, and display ://?k=miners+lamps.   electric cap lamps approved under part 19 aprl. # company issue dt. description last updated 4/15/20 1 17 koehler mfg. 08/14/39 lq wheat model q lamp (koehler- bright star) 17 koehler mfg. 05/02/40 gq wheat model q lamp (koehler-bright star) 18 edison storage 10/17/41 model h lamp. The "permissible" engraved on the lamp means the lamp was approved by the U.S. Bureau of Mines, and the lines on the glass portion suggest the lamp was used to judge methane levels. A plaque on the bottom reads: Wolf Safety lamp Co. of America, Inc. New York, USA. There is a plaque on the bottom of the lamp that reads: Mine Safety Appliance Co

  otherwise totally dark underground mine environment. The types of light sources that have been used in under- ground coal mine lighting, summarized in table 1, range from oil soaked wood chips, reeds, and bulrushes to the present day incandescent and arc-discharge lamps. Devel- opments such as the Spedding flint mill, the flame safety In the s electric hand lamps were being developed and by the s, the electric cap-lamp began to take over as the miner’s main light source. To compete with the strong light produced by the new electric lamps, makers started to produce high-candle-power ://   The Hirsch Electric Mine Lamp Company manufactured this electric cap lamp during the first half of the 20th century. The battery is enclosed in metal case, with a flexible cord that runs to the lamp that was worn on the miner’s helmet. Location Currently not on view ID Number -MN accession number catalog number MHI-MN /object-groups/mining-lights-and-hats/electric-lamps. PERMISSIBLE ELECTRIC MINE LAMPS. After the 1st day of October, , only electric lamps shall be used in coal mines, except in places generating explosive gas or noxious gases where an approved safety lamp shall be supplied for each working place for testing purposes and all lamps shall be the property of the owner and shall be main-://metadc/m1/