Squib design
US4208967A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1978 |
| Grant date | Jun 24, 1980 |
| Priority date | — |
| Expiry date | May 15, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B3/128
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The electrically initiated squib of this invention is comprised of a plug member with a pair of spaced apart electrical leads extending through the plug member into a holder member for containing a predetermined quantity of an easily-ignitable composition. A bridgewire that is constructed of a bimetallic composite (Pyrofuze) selected from palladium and aluminum, platinum and aluminum, and ruthenium-palladium alloy and aluminum is secured between the electrical lead ends that terminate in the holder member of the squib. The holder member is loaded with a loose, easily-ignitable composition which is a finely-ground and intimate mixture of a pyrotechnic which is a composition selected from the group consisting of 45% by weight zirconium and 55% by weight potassium perchlorate, 20% by weight boron and 80% by weight potassium nitrate, 45% by weight aluminum flake (17 to 44 microns) and 55% by weight potassium perchlorate (6 to 17 microns), and lead azide or lead styphnate, or a single-base, a double-base, or composite propellant composition in a powder or pellet form. The combination improves the reliability of the squib while reducing the controls on loading and assembly procedures. Th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.