Kirkman, Marshall M. (Marshall Monroe), 1842-1921 · New York and Chicago, The World railway publishing company · leaf 453
hen raising a load. In lowering, screwthis valve inwards slowly. This valve, being inde-pendent of the pumping mechanism, gives absolutecontrol over the speed or distance of the loweringweight, and a half turn of the thumbscrew will stopthe load at any point without the slightest jar. Should the… … Fig. 8.Geared Journal Jack. The levers are all made the proper length for oneman (of about one hundred and fifty pounds weight)to lift the full capacity of the jack. In no case mustmore than one man work the lever, nor must thehandle be lengthened, as damage to the jack will bethe result. The jack…
Locomotives
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