. Deep borehole surveys and problems. Boring. GYROSCOPIC COMPASS METHODS OF SURVEYING 219 hole. Amount and direction of inclination are read off the receiver in tenths of a degree. The Receiver.—The mode of action of the receiver (Fig. 152) has already been described. The alternating motor a in the receiver runs synchronously with the motor in the gyrowheel chamber in the plumbing apparatus and turns the counter 6 (detached in the figure) back in the direction for reading the inclination. Another motor c displaces a. Fig. 152.—Anschiltz apparatus. The surface receiver. main carriage d on a hor
. Deep borehole surveys and problems. Boring. GYROSCOPIC COMPASS METHODS OF SURVEYING 219 hole. Amount and direction of inclination are read off the receiver in tenths of a degree. The Receiver.—The mode of action of the receiver (Fig. 152) has already been described. The alternating motor a in the receiver runs synchronously with the motor in the gyrowheel chamber in the plumbing apparatus and turns the counter 6 (detached in the figure) back in the direction for reading the inclination. Another motor c displaces a. Fig. 152.—Anschiltz apparatus. The surface receiver. main carriage d on a horizontal spindle on which a second carriage e turns, also horizontal, but can be displaced 90 deg. to the main carriage. On the carriage e sits a bar magnet / with an end pointed upward 90 deg. which reaches close under the scale plate b and on it pulls a small iron ball. By this ball, on concentric circles, the magnitude of the inclination is read. Doctor Anschiitz has investi- gated the possibility of a coupling table on which the course of the borehole is automatically indicated on the plumbing apparatus being let into the hole. With such a device one would only have to draw in the depth indicated by the cable on the line of course of the borehole. The Transport Lorry.—A lorry carries the cable on a drum as well as a switch plant and all accessories. The cable is marked in to 25 m. for reading depths. It carries inside it the conductor cable from transmitter to 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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