E/MJ : Ingegneria e Industria mineraria ufficiale . e. Un manico di filo disposto in modo da tenere la lampada potrebbe besoldered alla periferia della cornice esterna (così come notto interferire con il prelievo del riflettore oltre), se desiderato. 1 (dicembre 2, 191 [NEEWNG AXU MINING JOURN l. hut non ho trovato questa necessaria, come bob casteadied con le dita della mano che tiene il bullseye e lampada.o dopo un po' di pratica con il bordo del bullse numerosi ingegneri in questa sezione hanno adoplreflector ed esprimere eal soddisfazione con esso. ELSecforic Slh©ve]l aft GjtpaiaJby B^ (.. M. ( mit.i i i primi in L91 ho un Bueyrus 10 R electric

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E/MJ : engineering and mining journal . e. A wire handle arranged to hold the lamp could besoldered to the periphery of the outer frame (so as notto interfere with taking the reflector apart), if desired. 1 (ecember 2, 191 [NEEWNG AXU MINING JOURN l. hut I have not found this necessary, as the bob casteadied with the fingers holding the bullseye and lamp.or after a little practice with the edge of the bullse Several engineers in this section have adoplreflector and express eal satisfaction with it. ELSecforic Slh©ve]l aft GjtpaiaJby B^ (. M. ( mit.i i i Early in L91 I a Bueyrus 10 R electric shovel was pur-chased for use mi the No. 2 tunnel level of the Granbyminis at Phoenix, B. C. The reasons that seemed tojustif) the purcha e of a power shovel were as follows:(l ) Waste could be handled more cheaply h loalarge masses direcl instead of drilling and blasting andthen handling from a lower level. The large quantity ofwaste to be handled, amounting to about half the totaloutput, made this reason an important one. (2) Most. of the ore could be handled fully as cheaply, additional advantage of having no development i(3) Ore could be cleaned up to the sill floor, resu Iin longer life for the shipping plant at that level also eliminating a hoisting charg i some ore. ( H WTiere ore and waste were more or less mixed, a better separation could 1 btained. (5) All mine cars could be loadi their fullest rapacity. The advantage am , , 1!l.v be described in the words of an advertisement: Why l.with coal, servio PPty ;! 1r in, , n veninences common to all steam-driven shovels whetcan do away with them by using electric shovels: Elei -trie shovels are always ready for wmk at a minutesnotice and are mosl onomical to maintain and operate.As electric power was available, it was decided to purchasea shovel of this type. Superintendent, Granby Consolidated Mining:, Smeltingand lower Co., Phoenix, i:. C. -un.I infront of the shovel had methods, .ml the broken rock drilled with small ? i s

Parole chiave associate all'immagine

• bo
• bookcentury1900
• bookdecade1910
• booksubjectmineralindustries