Steam Shovel Mining Including a Consideration of Electric Shovels And Other Po

Cover Steam Shovel Mining Including a Consideration of Electric Shovels And Other Po
Steam Shovel Mining Including a Consideration of Electric Shovels And Other Po
Robert Marsh
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High-class boards, lines, cables and instruments will 102 l STEAM SHOVEL MINING be cheapest to maintain and most satisfactory in the long run. It is well to allow for additions and extensions when installing equipment. Such companies as the Western Electric and Trom- berg Carlson are prepared to study conditions and supply or install such equipment.
In this connection note that fire or accident sirens may be so installed as to be operated directly or indirectly from the tele- phone central in c
...ase of emergency.
Locomotive Crane. One or two self-propelling locomotive- cranes of about 30 tons capacity will be found indispensable for clearing up wrecks, unloading and loading coal machinery and supplies, moving drills and much other work. For heavy work a short goose-neck boom should be provided, also clam-shell and orange-peel buckets. These machines are useful in doing a certain amount of excavation work where the cut is too shallow or the job too small for a shovel. Such jobs would be slower and more expensive if done by hand.


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