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 100
Seite x
... Position of Holes Harrison Ingersoll - Sergeant Yoch 79 Blasting . German , 80 Elliot Multiple Wedge Jeffrey Pillar and Stall 80 Bickford's Volley Fuse 79 Blown - out Shots 79 Various Methods to Supersede Haswell Mechanical Coalgetter ...
... Position of Holes Harrison Ingersoll - Sergeant Yoch 79 Blasting . German , 80 Elliot Multiple Wedge Jeffrey Pillar and Stall 80 Bickford's Volley Fuse 79 Blown - out Shots 79 Various Methods to Supersede Haswell Mechanical Coalgetter ...
Seite 2
... position , this being shown by the lie of pebbles in rocks , and by the position of fossil trees . It is , however , very rare to find the beds retaining this position , though the folding may be of the slightest . If a bed is at all ...
... position , this being shown by the lie of pebbles in rocks , and by the position of fossil trees . It is , however , very rare to find the beds retaining this position , though the folding may be of the slightest . If a bed is at all ...
Seite 16
... position shown in the illustration , and a short length of rod inserted between it and the main length attached to the tool . This operation is repeated until sufficient distance has been bored to allow of the insertion of an ordinary ...
... position shown in the illustration , and a short length of rod inserted between it and the main length attached to the tool . This operation is repeated until sufficient distance has been bored to allow of the insertion of an ordinary ...
Seite 21
... position of the tappets . Before the valves can be opened , it is necessary that the piston - rod should move ; a small quantity of steam is therefore kept continually blowing on to the underside of the piston , through the small port f ...
... position of the tappets . Before the valves can be opened , it is necessary that the piston - rod should move ; a small quantity of steam is therefore kept continually blowing on to the underside of the piston , through the small port f ...
Seite 35
... position they are drawn outwards by stretching screws , binding the supporting plates against the sides of the hole and the tube , and firmly locking the latter in position . Where abnormal pressures are likely to be encountered ...
... position they are drawn outwards by stretching screws , binding the supporting plates against the sides of the hole and the tube , and firmly locking the latter in position . Where abnormal pressures are likely to be encountered ...
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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