A Text-book of Coal-mining: For the Use of Colliery Managers and OthersCharles Griffin & Company, 1904 - 563 Seiten |
Im Buch
Ergebnisse 1-5 von 62
Seite ix
... Tools themselves " 29 ( c ) Guides 16 ( d ) Clearing Instruments 16 ( b ) Accidents arising out of the Nature of the ... Tools Used Shovels Picks . Dressers Wedges Hammers Drills Percussive Hand - tools Scrapers Tamping or Ramming Hand ...
... Tools themselves " 29 ( c ) Guides 16 ( d ) Clearing Instruments 16 ( b ) Accidents arising out of the Nature of the ... Tools Used Shovels Picks . Dressers Wedges Hammers Drills Percussive Hand - tools Scrapers Tamping or Ramming Hand ...
Seite 15
... tool drops in a different place each time . The general form of chisel employed is that having a straight edge ( Fig ... tools , the chisel was formerly made of wrought iron tipped with steel , but is now universally constructed of steel ...
... tool drops in a different place each time . The general form of chisel employed is that having a straight edge ( Fig ... tools , the chisel was formerly made of wrought iron tipped with steel , but is now universally constructed of steel ...
Seite 16
... tool . This operation is repeated until sufficient distance has been bored to allow of the insertion of an ordinary length of rod , the smaller making - up pieces being then removed . For unscrewing , an ordinary spanner key is employed ...
... tool . This operation is repeated until sufficient distance has been bored to allow of the insertion of an ordinary length of rod , the smaller making - up pieces being then removed . For unscrewing , an ordinary spanner key is employed ...
Seite 17
... tools are hung in the usual manner . ( g ) Frames . In order to enable the rods to be raised perpendicu- larly , a frame of three shear legs is erected at the surface , to which a pulley is attached at the top , one of the shear legs ...
... tools are hung in the usual manner . ( g ) Frames . In order to enable the rods to be raised perpendicu- larly , a frame of three shear legs is erected at the surface , to which a pulley is attached at the top , one of the shear legs ...
Seite 18
... tool which often leads to rupture when an attempt is made to withdraw it . To over- come these disadvantages several ... tool itself , and as much of the apparatus as is necessary to give weight to the blow . The tool designed by Kind ...
... tool which often leads to rupture when an attempt is made to withdraw it . To over- come these disadvantages several ... tool itself , and as much of the apparatus as is necessary to give weight to the blow . The tool designed by Kind ...
Inhalt
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Häufige Begriffe und Wortgruppen
alternating current amount angle Anthracite apparatus arrangement attached bars bolts boring bottom brake cage carbon carbonic acid carried cent centre chain coal coal-dust coils Colliery compressed connected consists cost cylinder depth distance drill driven drum employed engine explosion feet fire-damp fixed flange friction gear groove haulage hole inclined Inst iron lamp latter length lever lifted load longwall lower Lye Cross machine method mines motor obtained ordinary passes pieces pillars pipes piston placed plate plunger position pressure prevent props pulley pump quantity rails revolutions per minute roads rods roof rope round safety lamp screen screw seams Série shaft shown in Fig side sliding South Wales speed stall steam steel stroke surface timber tippler tool tube valve velocity ventilation vertical water gauge weight wheel winding winding engine wire yards