Method for manufacture stress detector
US4954215A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1989 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | May 5, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49071
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention relates to a method for manufacturing a highly reliable stress detector. Conventionally, a step of bonding and securing magnetic elements (4) to a driven shaft (1) receiving a stress was needed, so that a high technique was needed to secure the magnetic elements (4) uniformly at the entire surface and transversely symmetrically, disadvantageously increasing the process cost. The present invention therefore has as its object the manufacture of a reliable stress detector by simplifying the process of securing the magnetic elements (4) and realizing a good attachment. According to this invention, a strip of magnetic thin sheet is secured around the driven shaft receiving a stress, and a selective coating removal treatment is applied to the magnetic thin sheet secured to the driven shaft to form magnetic elements parallelly arranged at a predetermined angle relative to the central axis of the driven shaft. Also, the present invention includes a technique using an epoxy-based bonding agent in the attachment and regulating its thickness. According to this invention, a highly reliable stress detector can be realized by a simple, low-cost process, and the stress detector of …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.