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Article | REF: R1260 V1

Common length-measuring instruments

Author: Bernard SCHATZ

Publication date: September 10, 1997

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4. Comparators

Mechanical and, for some years now, electronic comparators are the most widely used measuring and comparison instruments, both in metrology and workshop control, and in the workshop on machines or control fixtures.

4.1 Radial retractable rod mechanism

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4.1.1 Principles and description

This is the most common dial indicator, still referred to by the trade as a "watch", given its resemblance to a watch that tells the time, a resemblance made all the more realistic by the fact that the mechanics...

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