Measuring device for the internal diameter of a tube

Details Measuring device for the internal diameter of a tube Measuring device for the internal diameter of a tube

1989-04-28

1990-05-08

Haroian, Harry N.

Geometrical instruments

Gauge

Internal

335554, G01B 310

Patent

active

049226223

ABSTRACT:
A measuring device which has a tape connected at one end to one end of a shaft and the tape is scrolled around the shaft. The visible surface of the tape includes a scale having a set of marks which defines a system of measuring units. The tape is inserted into a tube and allowed to spring open against the inner wall of the tube. A measurement can then be obtained for the internal circumference of the tube or the internal diameter of the tube.

REFERENCES:
patent: 1672913 (1928-06-01), Schaap
patent: 1986729 (1935-01-01), Johnston
Research Disclosure 19317, 5/80.

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