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Two devices to prevent electric arcs with airdox operations in coal mines

A study of stray electric currents in airdox systems in coal mines

Minimizing fire hazards in coal mines by proper circuit-breaker protection of 250/275-volt direct-current systems

Published Year

• 1940-1949 (2)
• 1950-1959 (1)

Subject

• Coal mines and mining--Safety measures (3) *
• Coal mines and mining--Electric equipment (2)
• Coal mines and mining--Equipment and supplies (2)
• Compressed air (2)
• Electric circuit-breakers (1)
• Electric circuits--Direct current--Safety measures (1)
• Mine fires--Prevention and control (1)

Author

• Gallagher, F. J. (3) *
• Brown, C. L. (1)
• Hyvarinen, John. (1)

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