Results 51 - 52 of 52

• Evaluation of the Seismic System for Locating Trapped Miners
  11/1/1981 - Reports of Investigations
  This report discusses the configuration and system deployment for the postdisaster surface seismic system for detecting and locating trapped miners.
• Waveform Generator for (EM) Location of Trapped Miners
  7/14/1974 - Contract reports
  This report describes a circuit for driving a low-frequency loop antenna from a miners cap lamp battery. The circuit is a miniature waveform generator and is part of the electromagnetic (em) trapped miner location system. Two engineering models were des...