Interchangeable probe tip for a magnetic thickness gauge

US4041378A · kind A · utility

Inventor

• Albert Ott · Niedernhausen, DE

Key dates

• Filing date: Jan 21, 1976
• Grant date: Aug 9, 1977
• Expiry date: Jan 21, 1996

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B7/105
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An interchangeable end piece for fastening to the front surfaces of a soft-iron magnetic yoke of a measuring probe which measuring probe is used for measuring the thickness of thin non-ferromagnetic layers on a ferromagnetic base comprising a pin element having a headplate, a contact piece welded to the headplate which contact piece is made from a mass-produced, high-precision steel element having a contact surface with a single radius of curvature, the radial angle of the contact surface, measured from the center of the underside of the contact piece, is much smaller than 90.degree., the surface of the contact piece outside the radial angle range is depressed, the maximum surface described by the radial angle is much smaller than the cross-sectional area of the pin element up to the rim of the underside of the contact piece.