PTC devices
US4876439A · kind A · utility
28Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 18, 1988 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | Jul 18, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49149
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A PTC device with a laminate having a PTC composition and at least two electrode plates having the PTC composition sandwiched therebetween, superposing, on the surface of each of the electrode plates of the laminate, a lead plate to be electrically connected to the electrode, joining the electrode plate and the lead plate by spot welding, and during or prior to the spot welding process, forming at least one through hole penetrating through the electrode plate and the lead plate in the center of a weld.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.