Geometrical instruments – Area integrators – Electrical
Patent
1978-09-25
1980-01-29
Stearns, Richard R.
Geometrical instruments
Area integrators
Electrical
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
Liggett Group Inc.
Ross, Jr. J. Bowen
Stearns Richard R.
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