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 21
... connected together by loose collars and screw threads . The chief peculiarity consists in the method of mounting the walking beam , which is sup- ported on a bearing resting on a cross - beam , between which and a * Coll . Guard ...
... connected together by loose collars and screw threads . The chief peculiarity consists in the method of mounting the walking beam , which is sup- ported on a bearing resting on a cross - beam , between which and a * Coll . Guard ...
Seite 25
... connection to which wrought iron pipes , b , are screwed . These pipes are carried to the surface , and are connected by mitre gearing to a steam engine , this giving the rotary motion to the tool . A stream of water under pressure is ...
... connection to which wrought iron pipes , b , are screwed . These pipes are carried to the surface , and are connected by mitre gearing to a steam engine , this giving the rotary motion to the tool . A stream of water under pressure is ...
Seite 36
... connected with mining . Bibliography . - The following is a list of the more important memoirs dealing with the subject matter of this chapter : - CHES . INST . Boring and Boring Machines , A. H. Stokes , iii . , 192 . : - AMER . INST ...
... connected with mining . Bibliography . - The following is a list of the more important memoirs dealing with the subject matter of this chapter : - CHES . INST . Boring and Boring Machines , A. H. Stokes , iii . , 192 . : - AMER . INST ...
Seite 44
... connected by a screw , cut with a right - hand thread at one end and a left - hand thread at the other , and can therefore either be brought in contact with , or disengaged from , the main propelling screw . Consequently the drill and ...
... connected by a screw , cut with a right - hand thread at one end and a left - hand thread at the other , and can therefore either be brought in contact with , or disengaged from , the main propelling screw . Consequently the drill and ...
Seite 53
... connected vibratory motion is set up , because the air tries to pull the valve open and the spring to shut it , and first one and then the other prevails . The dancing of the valve in Walker's air compressor is reduced by causing a ...
... connected vibratory motion is set up , because the air tries to pull the valve open and the spring to shut it , and first one and then the other prevails . The dancing of the valve in Walker's air compressor is reduced by causing a ...
Inhalt
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44 | |
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344 | |
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356 | |
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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