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 2.5 to 25 m. for reading depths. It carries 

 inside it the conductor cable from transmitter to receiver. 



