Probe with ball bearing ball
US4005360A · kind A · utility
11Cited by
5References
16Claims
0Family size
Inventor
Key dates
| Filing date | Dec 10, 1975 |
| Grant date | Jan 25, 1977 |
| Priority date | — |
| Expiry date | Dec 10, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/105
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a probe for measuring the thickness of thin non-ferromagnetic layers on a ferromagnetic base, with a spherical sector consisting of a ground ball bearing ball, with a pin-like fastener connected to the bottom side of the ball bearing ball, with a magnetizable carrier whose side, facing the spherical sector, has an opening for the fastener to be inserted there and which carries a transmission coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.