Circuit protector, resilient heat-sensitive plate therefor and its manufacturing method
US6144541A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1999 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Mar 25, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H37/5418
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A heat-sensitive plate is substantially rectangular, has its one end portion fixed to a second terminal plate and has a movable contact mounted on the other end portion. The one side of the heat-sensitive plate facing a fixed contact forms a high expansion coefficient side and the other side a low expansion coefficient side. The heat-sensitive plate has a protrusion protrusively provided on the low expansion coefficient side centrally thereof by press working with a small outer diameter and a large curvature, and an annular press-thinned portion formed by press working concentrically with the protrusion and having an inner diameter appreciably larger than the outer diameter of the protrusion. In the initial state the heat-sensitive plate is held curved in a funnel shape protrusive about the protrusion on the low expansion coefficient side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.