. Deep borehole surveys and problems. Boring. AUXILIARY REGISTRATIONS IN BOREHOLE SURVEYS 27 principle of recording the progress of the borehole is here again dependent on the sinking of the rods and time. The paper is turned by clockwork and the recording pen is driven by the feed device. The paper roll is chosen of such diameter that the clockwork rotates it on its axis once in 12 hr. and 1 mm. of paper corresponds to 1 min. of time. Therefore millimeter paper is chosen for the graph. The. Fig. 6.—Foraky stratigraph. recording contrivance is driven from a screw spindle on the rod feed in suc
. Deep borehole surveys and problems. Boring. AUXILIARY REGISTRATIONS IN BOREHOLE SURVEYS 27 principle of recording the progress of the borehole is here again dependent on the sinking of the rods and time. The paper is turned by clockwork and the recording pen is driven by the feed device. The paper roll is chosen of such diameter that the clockwork rotates it on its axis once in 12 hr. and 1 mm. of paper corresponds to 1 min. of time. Therefore millimeter paper is chosen for the graph. The. Fig. 6.—Foraky stratigraph. recording contrivance is driven from a screw spindle on the rod feed in such a way that a sinking of the rods of 10 cm. corresponds to a progressive motion of the pen of 1 cm. The inked pen C (Fig. 6) moves^ proportionally with the descent of the rods. It is connected to the rods by the screw spindle d from the feed device and by a cone-wheel trans- mission gear e actuating the screw spindle /. This carries a positive nut g holding the pen c. The axis of the clockwork b gives the true reading and the whole is encased in the casing h for protection. The apparatus is placed on a frame in the boring tower but not in contact with it. It has been successfully applied to depths of over 4,000 ft. ^Gluckauf, p. 417, Mar. 18, 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
Size: 1229px × 2034px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionb, bookpublishernewyorkmcgrawhill
