Apparatus for testing elongated objects having a radially adjustable rotary probe

US5517114A · kind A · utility

Assignee

• Institut Dr. Friedrich Forster Prufgeratebau GmbH & Co. KG · DE

Inventors

• Helmut Reitz · Metzingen, DE
• Helmut Schwarz · Tübingen, DE
• Heinrich Braun · Bischofswerda, DE

Key dates

• Filing date: May 19, 1994
• Grant date: May 14, 1996
• Expiry date: May 19, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/9013
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A device for testing elongated objects, particularly wires, optionally with cross-sectional irregularities, which has a rotating test head traversed by the object and on which is provided a probe, particularly an eddy current probe, provided on rotary probe holding means and guided on circular paths about the object. For the change of the radial spacing between the object and the probe with the test head rotating, externally controllable e.g. by a sensor for irregularities, the device has a switching device with two inherently stable switching states, whereof one can correspond to a testing position near the object and another to a raised position further removed from the object and which can be rapidly set for protecting the probes.