Coal Getting by Hydraulic Press
1888
Scientific American
can be made to feed at one rate of speed the full length I The following are the details of the press, Figs. 1 and of the spoke, which is a great advantage. By press-2: A is a cast steel bar containing a number of circu ing a small lever, the feed can be stopped in any desired lar cavities, in which are placed rams of steel. These position along th<cl spoke for setting the rests or truing rams are fi tted in the circular holes of the bar so as to the kni ves. The feed screw is made of steel,
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... h an act freely; on the top of each ram i� placed a cup adjustable nut to take up any wear that may occur. leather, d, which is fixed to the rams by means of a An improvement recently added, and not shown in our screw and a metal washer, which latter nearly covers engraving, is an ingenious arrangement for automa-their surface, leaving only a small margin accessible to tically lifting the frame carrying the spoke into the the influence of the water. Over the head of the screw cut, thus making this lathe perfeetly automatic in all fastening the cup leather to the ram is drilled a small its movements. The operator has nothing to do but hole which opens into the waterway, k, and by which to remove the finished spoke and put in the stnck. He the water has access to the top of the rams, c. does not leave his position, merely lifting a lever, which The first and last ram in this press has a groove in sets the vibrating frame into the cut ; the carriage, with its outer side which runs nearly up to the cup leather. cutter head attached, travels along the bed, completing In this groove fits the prominent part of the little plate, the spoke, the vibrating frame throws forward and the u, which is fixed to the body of the press by means of
doi:10.1038/scientificamerican07211888-10462asupp
fatcat:ne3nvkk64jctfgmmlfpjbuyqv4