Geometrical instruments – Area integrators – Electrical
Patent
1977-12-08
1979-02-06
Stearns, Richard R.
Geometrical instruments
Area integrators
Electrical
33147N, 33148H, 33178E, 324231, G01B 706
Patent
active
041376390
ABSTRACT:
A device for the measurement of the wall thickness of tubes, in particular for the measurement of extruded synthetic tubes during the extrusion process, comprises a common support for location within the tube and a plurality of measuring bodies mounted on the support and urged resiliently outwards for engagement with the tube wall. In order to provide a sufficiently robust support for the measuring bodies they are connected to the support by means of a parallelogram linkage, and in order to allow the measuring bodies a degree of free movement so that they can conform to the contour of the tube wall at least one parallelogram arm of the parallelogram linkage is pivoted with free play.
REFERENCES:
patent: 2423671 (1969-01-01), Vezin
patent: 2519221 (1950-08-01), Bogen et al.
patent: 2563254 (1951-08-01), Lewis
patent: 2855685 (1958-10-01), Barreteau
patent: 3882606 (1975-05-01), Kaenel et al.
Stearns Richard R.
Zumbach Electronic AG
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