Shear-pin based inertia igniters with preset no-fire protection for munitions and the like
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United States of America Patent
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Feb 14, 2023
Grant Date -
N/A
app pub date -
Oct 25, 2019
filing date -
Mar 26, 2017
priority date (Note) -
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Abstract
An inertial igniter for igniting a thermal battery, including: a base having a first projection; a striker mass rotatably connected to the base having a second projection, when the striker mass is rotated towards the base, the first projection impacts the second projection; a member having a first portion engaging with a second portion of the striker mass to restrict rotation of the striker mass unless a predetermined acceleration is experienced; a mass movable from a first position where an acceleration is less than the predetermined acceleration and a second position where the acceleration is greater than the predetermined acceleration to permit the first and second portions to come out of engagement; a spring for biasing the mass in the first position; and a rotation prevention member for permitting impact of the first and second projections when the predetermined acceleration is experienced and the mass moves to the second position.
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