davy lamp การใช้

• They are much larger that the Davy lamp and give a better light.
• The research led to the Davy lamp, and Hodgson's help was acknowledged.
• The explosion was apparently caused by a hole in one of the workers'Davy lamps.
• In the early days of coal mining the Davy lamp was used by miners for lighting.
• All except the very earliest Davy lamps have a double layer at the top of the cage.
• Knockermen were made obsolete in the Ramtops when a dwarf in Ankh-Morpork invented the Davy lamp.
• The first trial of a Davy lamp with a wire sieve was at Hebburn Colliery on 9 January 1816.
• If flammable gas mixtures were present, the flame of the Davy lamp burned higher with a blue tinge.
• Released on Davy Lamp Records, all proceeds of the record were going to the Anti-Apartheid Movement.
• The Stephenson lamp was used almost exclusively in North East England, whereas the Davy lamp was used everywhere else.
• He confirmed much that had earlier been reported; the pit was well ventilated and Davy lamps were in use.
• Rather than the Davy lamp, Tyneside miners used the Geordie lamp, a similar safety lamp designed by George Stephenson.
• After the widespread introduction of the safety lamp, explosions continued because the early Davy lamps were fragile and easily damaged.
• An escape of inflammable gas under pressure extinguished the rescue team's Davy lamps but they continued working in darkness.
• Known as the Geordie lamp it was to be widely used in the North-east in place of the Davy lamp.
• Deep Navigation NUM lodge provided each working and recently retired miner with a presentation Davy lamp, with over 800 lamps distributed.
• "' The Davy Lamp "'was a modern public house, opened in the 1980s on the Agar Nook estate.
• The report states : " These gauze or safety lamps were not Davy lamps, but of a kind in common use throughout Scotland.
• :For containing the flame, I'd suggest enclosing the whole vortex chamber in wire mesh, similar to a Davy lamp.
• In a coal mine containing highly explosive coal dust or methane, the wire mesh of a Davy lamp must be very tightly spaced.