A Text-book of Coal-mining: For the Use of Colliery Managers and OthersCharles Griffin & Company, 1904 - 563 Seiten |
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Ergebnisse 1-5 von 76
Seite xi
... Stops • 226 226 " Method of laying Rails . 226 Drums and Pulleys Fish Plates . Sleepers 226 Brakes . 227 Rollers 227 Junctions Wood Iron . Steel Switches Plates Turntables Tubs Bodies Frames Height Size 227 Transmission of Power 228 229 ...
... Stops • 226 226 " Method of laying Rails . 226 Drums and Pulleys Fish Plates . Sleepers 226 Brakes . 227 Rollers 227 Junctions Wood Iron . Steel Switches Plates Turntables Tubs Bodies Frames Height Size 227 Transmission of Power 228 229 ...
Seite 16
... stops ( b , b ) turning around pins . A piece is cut out of each shutter , leaving an opening central with the hole , and of a size slightly larger than the rods , so that when the latter are in position the space is filled in . This ...
... stops ( b , b ) turning around pins . A piece is cut out of each shutter , leaving an opening central with the hole , and of a size slightly larger than the rods , so that when the latter are in position the space is filled in . This ...
Seite 17
... stops ( 2 , Fig . 11 ) are opened , and a hook ( Figs . 16 and 17 ) at the end of the rope is placed beneath a joint in the rods , these being then detached from the end of the lever . 2 SEARCH FOR COAL . 17 Spring Poles (g) Frames.
... stops ( 2 , Fig . 11 ) are opened , and a hook ( Figs . 16 and 17 ) at the end of the rope is placed beneath a joint in the rods , these being then detached from the end of the lever . 2 SEARCH FOR COAL . 17 Spring Poles (g) Frames.
Seite 18
... stops are closed beneath the nearest joint , and the rods above that joint un- Figs . 16 and 17 . screwed and removed . This operation is repeated until all are withdrawn . The sludger is then lowered , either by the same rope , or , if ...
... stops are closed beneath the nearest joint , and the rods above that joint un- Figs . 16 and 17 . screwed and removed . This operation is repeated until all are withdrawn . The sludger is then lowered , either by the same rope , or , if ...
Seite 19
... stop placed beneath the rocking lever at the surface . By this means , the shocks received by the tool and lower rods do not reach the upper part . Mr. W. Wolski * is of opinion that the consideration of the proper length of the stroke ...
... stop placed beneath the rocking lever at the surface . By this means , the shocks received by the tool and lower rods do not reach the upper part . Mr. W. Wolski * is of opinion that the consideration of the proper length of the stroke ...
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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