Figure 1-4. Computing-correcting mechanism

TM 9-6685-202-14

Figure 1-4. Computing-correcting mechanism - rear view.

element, and an evacuation manifold and valve

assembly. The various components that comprise the

Type A-1 (Modified). The type A-1

modified barometer are located and identified in figure

modified barometer (fig. 1-1) consists of a precision

bore glass tube rising out of a fixed cistern. The tube is

supported by a frame set on a mounting platform. The

cistern is also a precision bore glass cylinder and is

(1) Mounting Platform Assembly.

The

mounted on the barometer base and connected to the

mounting platform (fig. 1-2) serves as a level platform

tube through a passage in the base. The modified

for mounting the barometer proper. Two sensitive

barometer has a micrometer mounted in the cistern to

bubble levels and three leveling strews are provided.

measure the level of mercury in the cistern. so, the

One division of the level scales equals 30 seconds of

modified barometer has a vacuum gauge and sensing

arc. A battery compartment

1-7