Miners' Circular, Volum 53Bureau of Mines, 1945 |
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Resultat 1-5 av 18
Side
... electricity , the prevention of accidents , and other inquiries and technologic investigations pertinent to said industries , and from time to time make such public reports of the work , investigations , and infor- mation obtained as ...
... electricity , the prevention of accidents , and other inquiries and technologic investigations pertinent to said industries , and from time to time make such public reports of the work , investigations , and infor- mation obtained as ...
Side 1
... Electrical and Mechanical Hazards in Metal Mines ; covers accidents from these causes and their prevention . Accidents from falls of per- sons are also discussed in this section . Fires , Gases , and Ventilation in Metal Mines ...
... Electrical and Mechanical Hazards in Metal Mines ; covers accidents from these causes and their prevention . Accidents from falls of per- sons are also discussed in this section . Fires , Gases , and Ventilation in Metal Mines ...
Side 6
... electric- and steam - powered hoists should be equipped with devices that will cause automatic application of the brakes in case of power failure . They should permit the lowering of the cage , skip , or cars by means of the brakes . 6 ...
... electric- and steam - powered hoists should be equipped with devices that will cause automatic application of the brakes in case of power failure . They should permit the lowering of the cage , skip , or cars by means of the brakes . 6 ...
Side 17
... Electrical signaling devices of the pull - switch type , with a signal light on each level and both light and gong in the hoist room , supple- mented by an auxiliary system consisting of a counterbalanced rope suspended in the shaft and ...
... Electrical signaling devices of the pull - switch type , with a signal light on each level and both light and gong in the hoist room , supple- mented by an auxiliary system consisting of a counterbalanced rope suspended in the shaft and ...
Side 18
United States. Bureau of Mines. methods of signaling . The electrical station signal should be acces- sible from the cage . For calling cages or skips , a separate call system may be installed ; it should be independent of the signal ...
United States. Bureau of Mines. methods of signaling . The electrical station signal should be acces- sible from the cage . For calling cages or skips , a separate call system may be installed ; it should be independent of the signal ...
Vanlige uttrykk og setninger
alined American Standards Association automatic brakeman brakes bucket bumper Bureau of Mines cage or skip causes chutes circular clearance conical drums couplers coupling derailments drift drums dumping electric electric locomotive engineer fastening fatal feet figs FIGURE gates grades hand tramming handling haul haulage accidents haulage crews HAULAGE EQUIPMENT haulageway hazard hoisted or lowered HOISTING AND HAULAGE hoisting cable hoisting rope hoistman inches injuries inside of empty inspected installed light light rails loaded cars locomotive frame main haulage manways material metal mines Metal-Mine methods Mines Bull Mines Miners motor motorman moving nonmetal Nonmetal-Mine Accidents open-cut operating percent permitted placed platform prevent pushed rails repair ride roadbed rope diameter Safe Practices safety devices safety dogs sheave side signal system skip tender socket speed station steel stop storage-battery locomotives strands SURFACE HAULAGE switch timber train transportation trip trolley locomotives trolley pole truck underground vertical shafts wear wires zinc