Archive image from page 199 of Deep borehole surveys and problems. Deep borehole surveys and problems deepboreholesurv00hadd Year: 1931 Fig. 127. the plumbing frame with the registering apparatus is inserted. Thus one can screw up the casing without nut surfaces and still if needed be able to read the position of the registering apparatus against a guide rod. The Guide Springs.—The longitudinal guides above and below the cylinder are of steel and ringed at their ends, the rings being rotat- able about the plumbing cylinder. The outer ring can be adjusted up and down it. These springs (Fig. 1
Archive image from page 199 of Deep borehole surveys and problems. Deep borehole surveys and problems deepboreholesurv00hadd Year: 1931 Fig. 127. the plumbing frame with the registering apparatus is inserted. Thus one can screw up the casing without nut surfaces and still if needed be able to read the position of the registering apparatus against a guide rod. The Guide Springs.—The longitudinal guides above and below the cylinder are of steel and ringed at their ends, the rings being rotat- able about the plumbing cylinder. The outer ring can be adjusted up and down it. These springs (Fig. 127) must act simi- larly together so that the most outer points always lie on a conical surface through the axis of the apparatus. The Inclination Measurer.— Figure 128 shows the internal construction of the dip meas- urer. One of the three bars forming the frame has a lamp (4 volts, amp.) with a reflecting parabolic mirror h below it (Fig. 128). The side conductor wires leading up from the lamp are well coiled about one another in order not to influence the neighboring magnets. Next above the lamp is a plain glass plate c with a swinging magnetic needle d held by arm e. A Httle above this an adjustable level / is pro- vided with a glass floor on the cover of which a second magnet swings. The glass plate may be removed so that both magnets, oppositely influenced, may give a suitable intersection angle. Above the level on its glass cover are concentric rings 2 mm. apart, then come the lenses g and h (Fig. 128). Some convex 1 Gliickauf, No. 7, p. 233, Feb. 15, 1908; Mitt. Markschei- derwesen, Heft 9, p. 53, 1908.
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