Airbag igniter having double glass seal

Details Airbag igniter having double glass seal Airbag igniter having double glass seal

1991-11-05

1992-08-25

Jordan, Charles T.

Ammunition and explosives

Igniting devices and systems

Electrical primer or ignitor

1022025, 1022029, 102530, F42C 1912

Patent

active

051409062

ABSTRACT:
An airbag igniter having an initiator charge in an inner case and an output charge in a surrounding outer case, has a first metal header closing the inner case and a glass seal providing feed through of one or more electrical connections to the initiator charge through the first header. The outer case has a second metal header fitted to it. The second header surrounds the first header in a spaced relationship maintained by a second glass seal. The second glass seal electrically isolates the second header and outer case from the inner header for protection against accidental ignition. The dual glass seals provide protection against maloperation due to gas leakage. A ceramic washer in axial compression between the outer header and a flange of the inner header provides added assurance against failure of the second glass seal.

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