Traveling-Wire Micrometer

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Traveling-Wire Micrometer

 

(also impersonal micrometer), an auxiliary device used to determine the position of a star in the field of view of certain astronomical instruments, such as a transit instrument, theodolite, or meridian circle. It is a variation of the ocular micrometer, in which the screw is provided with a contact drum connected to the circuit of a chronograph.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.