Sketches of 2 acceptable types of safety dogs will help in identifying dogs or safety catches on second hand cages in particular; most common type of mechanism is also illustrated; discussion refers to inclined conveyances equipped with standard type of mechanism and safety catch for wooden guides, conveyance using flanged wheels on railway track as well; other types of safety devices for inclined conveyances.
More about safety dogs
Can Min J
Canadian Mining Journal ; 84 , n 11
1963
6 pages
Article (Journal)
English
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