The Colliery Manager's Handbook: A Comprehensive Treatise on the Laying-out and Working of Collieries Designed as a Book of Reference for Colliery Managers and for the Use of Coal-mining Students Preparing for First-class CertificatesCrosby Lockwood and Son, 1891 - 578 halaman |
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Halaman 47
... plates only , thereby avoiding appreciable wear to its working parts . 2. The clasp stud E , which lips over the top part of the outside plates , considerably strengthens the hook in case of any excessive strain or jerk , and also ...
... plates only , thereby avoiding appreciable wear to its working parts . 2. The clasp stud E , which lips over the top part of the outside plates , considerably strengthens the hook in case of any excessive strain or jerk , and also ...
Halaman 91
... plates of a mild nature , possessing moderately high tensile strength , but great ductility should always be used . Boiler makers test the plates used for boiler making in many ways . One test for ductility is to bend back the flange of a ...
... plates of a mild nature , possessing moderately high tensile strength , but great ductility should always be used . Boiler makers test the plates used for boiler making in many ways . One test for ductility is to bend back the flange of a ...
Halaman 92
... plates are punched when flat , and afterwards bent to shape , whereas the drilling is done after the plates have been bent . A plate with punched holes receives damage along the row of holes in bending . To some extent , also , punching ...
... plates are punched when flat , and afterwards bent to shape , whereas the drilling is done after the plates have been bent . A plate with punched holes receives damage along the row of holes in bending . To some extent , also , punching ...
Halaman 93
... plates closer together . Formerly , all the joints were riveted by hand , but now wherever a machine can be applied ... plates drawn closely together before riveting , or the com- pression of the body of the rivet into the hole may ...
... plates closer together . Formerly , all the joints were riveted by hand , but now wherever a machine can be applied ... plates drawn closely together before riveting , or the com- pression of the body of the rivet into the hole may ...
Halaman 94
... plate as shown in Figs . 85 and 86 . Occasionally both the front and back plates are attached to the shell by inside angle iron , but usually the back end plate is flanged and then riveted to the shell plates by an ordinary lap joint as ...
... plate as shown in Figs . 85 and 86 . Occasionally both the front and back plates are attached to the shell by inside angle iron , but usually the back end plate is flanged and then riveted to the shell plates by an ordinary lap joint as ...
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airway allow angles arrangement attached Barnsley boiler bore-hole bottom brattice cage carbonic acid centre chain chocks Clifton Hall Colliery coal measures Coal Seam Colliery Cornish cubic feet cubic foot cylinder depth distance downcast drill driven drum engine explosion face fathoms feet of air feet per minute fire-damp fireclay flue foot friction furnace hole horizontal horse-power inches in diameter incline iron joints lamp Lancashire boiler length lever lift load Longwall lower means method motion pass pillars pipe piston placed plates pressure props pulley pump quantity of air revolutions per minute riveted road roadway rock rods roof rope round safety-lamps screw shown in Fig side South Wales sprags square inch stall steam steel strata stroke surface temperature thick timber tons tube tubs underground valve velocity ventilation vertical water-gauge weight whilst winding wire wire rope yards دو
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