초록 ▼

An airbag initiator having an ignition charge and a low temperature ignition charge in an inner case and a metal header closing the inner case, a glass seal providing feed through of one or more electrical connections to the ignition charge through the header. The seal is preferably formed using gla

An airbag initiator having an ignition charge and a low temperature ignition charge in an inner case and a metal header closing the inner case, a glass seal providing feed through of one or more electrical connections to the ignition charge through the header. The seal is preferably formed using glass material. A ceramic base supports the header and their spaced relationship maintained by a single continuous glass seal. The ceramic base and glass seal electrically isolates the header and ignition charge against accidental ignition. The ceramic to glass to metal seal provides protection against leakage of unfiltered gas from the inflator system. A ferromagnetic pressed material is assembled into the ceramic base and it's spaced relationship to the ceramic body and the electrical connections are maintained by a single continuous glass seal.

대표청구항 ▼

[ I claim:] [1.] An electroexplosive initiator for a pyrotechnic charge comprising:an ignition charge;a charge holder containing said ignition charge;a header with said charge holder connected to the surface of the header, and having a header through passage with at least one of a pair of electrical

[ I claim:] [1.] An electroexplosive initiator for a pyrotechnic charge comprising:an ignition charge;a charge holder containing said ignition charge;a header with said charge holder connected to the surface of the header, and having a header through passage with at least one of a pair of electrical conductors extending through said passage; a ceramic base having a base passage which base supports said header, the conductors being held in positions in said header through passage and in the base through passage by means for sealing said conductors in said through passages which means for sealing (a) is positioned in such through passages by introducing into such passages solidified glass elements, heating such glass elements to 800.degree. C. or more in a protected atmosphere and allowing such heated glass to slowly cool to create a high pressure seal; and in which such sealing means (b) causes the ceramic base, header and the conductors to be connected together to form a hermetic seal to withstand 5,000 psi of static pressure and 75,000 psi peak pressure;a firing circuit;a bridge wire in contact with said ignition charge;said pair of conductors connecting said bridge wire to said firing circuit, for igniting said ignition charge in response to a current in said conductors;an output charge;a metal cup fitting said header, said metal cup being attached to the header, and said metal cup containing the output charge;a plastic cup of electrically nonconductive material fitted over the metal cup and attaching to the ceramic base;whereby the initiator is structurally strong and hermetically sealed against substantial pressure andsaid header and said metal cup are electrically isolated from one of said pair of conductors absent the bridge wire.