Electrostatic safe electric match
US4380958A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1980 |
| Grant date | Apr 26, 1983 |
| Priority date | — |
| Expiry date | Dec 17, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B3/18
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A safe electroexplosive device such as an electric match is provided by cring the existing electric match with a coating that prevents electrostatic discharge penetration of the coating. The coating may be either an inner insulator with a conductive outer layer or it may be just a conductive layer over the match. Use of the insulator coating allows an open-circuit terminal to remain once the device is initiated by its power source. Use of only the conductive coat requires the coat to have a resistance greater than the match bridgewire circuit resistance and leaves a low resistance path across the power source after the device has been fired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.