Figure 61. Horizontal circle prism carrier, disassembly and reassembly.
Section XIII. HORIZONTAL CLAMP, CLAMP RING, CONTACT RING, OUTER
VERTICAL AXIS, AND HORIZONTAL
and provides a seat for the bearings on which the U-
113. General
standard rotates.
The horizontal clamp is used to lock the upper part
of the theodolite in any desired position. The horizontal
slow-motion screw is incorporated in the clamp to
114. Horizontal Clamp
provide precise horizontal sighting. The clamp ring,
a. Removal.
mounted on the top of the horizontal circle housing,
(1) Remove the horizontal slow-motion screw
provides a locking surface for the clamp. The contact
ring provides a means for transferring electrical current
(2) Refer to figure 62 and remove the
from the base to the upper part of the theodolite. The
horizontal clamp.
outer vertical axis retains the horizontal circle mount
76
AGO 5078A
