Device for measuring the circumference of a cylindrical rod

Geometrical instruments – Area integrators – Electrical

Patent

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Details

G01B 500, G01B 508

Patent

active

041853938

ABSTRACT:
The hand held measuring device measures the circumference of a cylindrical rod by moving the rod through a measured path between two cylinders. An ink marking device is used to place an index mark on the rolling rod and a transparent scale is used at the end of the measured surface of the outer cylinder to indicate the distance the rod has travelled. Coincidence of the index mark with the scale reading is a measure of the circumference of the rod. The device is operated manually via a hand wheel secured to a trunnion of the inner cylinder.

REFERENCES:
patent: 2971262 (1961-02-01), Muller

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