Results 211 - 219 of 219

• Detection of Trapped Miner Electromagnetic Signals Above Coal Mines
  7/1/1980 - Contract reports
  This report assesses the expected detectability, on the surface above mines, of electromagnetic signals produced in the 630- to 3,030-hz frequency band by a rescue transmitter activated by miners trapped underground. The implications of the results and ...
• An Electromagnetic System for Detecting and Locating Trapped Miners
  1/1/1976 - Reports of Investigations
  The theory of electromagnetic fields indicates such fields could be used to detect and locate trapped miners. To be useful, the hardware of the system must meet a number of requirements, including small size, intrinsic safety, and rugged construction. S...
• Technical Bulletin Pager Phones: Installation
  4/1/1975 - Contract reports
  The pager phones used in many underground coal mines are battery-operated, party-line telephones with provisions for loudspeaker paging. The system is two-wire, non-polarized, and is operated by self-contained batteries. A description of the many teleph...
• Waveform Generator-Package and Receiver: Mancarried and Helicopter Receiver Portion
  11/1/1974 - Contract reports
  The report describes the design and building of 15 mancarried and 5 helicopter receivers that are used for trapped miner location during a mine disaster. Helicopters are equipped with six-channel receivers and used to detect transmitters carried by mine...
• Survey of Electromagnetic and Seismic Noise Related to Mine Rescue Communications: Volume I - Emergency and Operational Mine Communications
  9/1/1974 - Contract reports
  Volume I of this report deals with theoretical, experimental, and practical implementation aspects of the federal Bureau of Mines programs related to present and planned, emergency and operational, mine communications and miner location systems for unde...
• Survey of Electromagnetic and Seismic Noise Related To Mine Rescue Communications: Volume II - Seismic Detection and Location of Isolated Miners
  7/1/1974 - Contract reports
  Volume II of this report (Contract No. H0122026) presents the findings of a short intensive assessment performed during the fall of 1972. This assessment provided the federal Bureau of Mines with independent technical judgments regarding the potentials ...
• Preliminary Performance Predictions For Electromagnetic Through-The-Earth Mine Communications: A Collection of Working Memoranda
  3/1/1972 - Contract reports, Open File Reports
  This report comprises three working memoranda that present preliminary performance estimates for baseband voice and narrowband through-the-earth electromagnetic communications systems of principal interest to the Bureau of Mines for operational/emergenc...
• Technology News 510 - HazCom Helper - OSHA Version: Compliance Tool For OSHA Rule 29 CFR 1910.1200
  10/1/2005 - Technology News
  NIOSH personnel developed the HazCom Helper - MSHA Version to help mining companies write their HazCom documents as required by 29 CFR 1910.1200. Following many requests for the HazCom Helper from companies regulated by OSHA, NIOSH revised the program t...
• Technology News 503 - HAZCOM Helper Compliance Tool for MSHA Rule 30 CFR Part 47
  3/1/2003 - Technology News
  Discusses a NIOSH-developed software tool for writing a HazCom plan.