. Deep borehole surveys and problems. Boring. 24 DEEP BOREHOLE SURVEYS AND PROBLEMS of the graph paper n is caused by the sinking of the rods a. A hook e on a ring on the boring spindle catches in the chain. This chain runs over the rollers g, gi and g2 and is kept taut by the weight h. The motion of the roller g is trans- mitted by means of a bevel wheel on the shaft I so that the paper moves corresponding to the deepening of the borehole. The speed of the paper depends on the transmission between the bevel wheels i and k. The pen moves on an endless chain p (Fig. 4) at right angles to the di
. Deep borehole surveys and problems. Boring. 24 DEEP BOREHOLE SURVEYS AND PROBLEMS of the graph paper n is caused by the sinking of the rods a. A hook e on a ring on the boring spindle catches in the chain. This chain runs over the rollers g, gi and g2 and is kept taut by the weight h. The motion of the roller g is trans- mitted by means of a bevel wheel on the shaft I so that the paper moves corresponding to the deepening of the borehole. The speed of the paper depends on the transmission between the bevel wheels i and k. The pen moves on an endless chain p (Fig. 4) at right angles to the direction of the drum graph, and it is driven by the toothed wheels q and q^.. iJL^ M fiS,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Haddock, M. H. (Marshall Henry). New York, McGraw-Hill
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