Protective devices for electrical equipment and components
US4757414A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1986 |
| Grant date | Jul 12, 1988 |
| Priority date | — |
| Expiry date | Jul 31, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G2/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A capacitor is composed of an external casing with an internal polyurethane encapsulation containing a polypropylene layered metallized film type capacitor element. Inside the casing is a component in the form of a frangible substrate having at least one conductive track thereon. The track establishes connection between a terminal on the casing and the capacitor element. The substrate is either mounted directly to the inside of the casing or is contained in a cartridge. The substrate is of brittle nature and distorts should pressure increase in the casing to shatter to break the track and isolate the terminal from the capacitor element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.