Apparatus for measuring the wall thickness of a moving tube wher

Details Apparatus for measuring the wall thickness of a moving tube wher Apparatus for measuring the wall thickness of a moving tube wher

1977-05-02

1978-09-26

Corcoran, Robert J.

Electricity: measuring and testing

Magnetic

Magnetic sensor within material

324231, G01R 3312

Patent

active

041174020

ABSTRACT:
Apparatus for measuring the wall thickness of a moving tube, for example an extruded tube of synthetic plastics material, comprises means for location in a stationary position within the tube and adapted to present at least one measuring body in resilient contact with the inner wall of the tube, and an external sensor for sensing the position of the measuring body. A mechanical linkage incorporating means engaging the tube wall is arranged to lift the measuring body away from the tube wall when excessive friction between the tube wall and the engagement means indicates a condition liable to damage the measuring body.

REFERENCES:
patent: 2563254 (1951-08-01), Lewis
patent: 2882488 (1959-04-01), Price et al.
patent: 3107379 (1963-10-01), Hill
patent: 3864625 (1975-02-01), Zumbach et al.

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