Protrusion sensor for sensing protrusion on a disc
US5488857A · kind A · utility
24Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1994 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Nov 29, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N29/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A protrusion sensor according to the present invention comprises a protrusion sensing head, a suspension spring having a front end portion fixedly mounting the protrusion sensing head and a rear end portion fixedly secured to one surface of a support arm, a carriage for supporting the support arm and a vibration sensor of piezo-electric ceramics fixedly mounted on the other surface of the support arm. A protrusion is detected by the collision of the protrusion sensing head flying by air flow on a surface of a rotary disc caused by rotation thereof with a protrusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.