Compact mechanical inertia igniters for thermal batteries and the like
First Claim
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1. An inertial igniter for igniting a thermal battery upon a predetermined acceleration event, the inertial igniter comprising:
- a base having a first projection;
a striker mass rotatably connected to the base through a rotatable connection, the striker mass having a second projection aligned with the first projection such that when the striker mass is rotated towards the base, the first projection impacts the second projection; and
a rotation prevention mechanism for preventing impact of the first and second projections unless the predetermined acceleration event is experienced;
wherein the rotation prevention mechanism comprises a retaining member movably disposed at least partially in the striker mass and a blocking member movably disposed in a blocking position for blocking the retaining member from moving from the striker mass unless the predetermined acceleration event is experienced.
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Abstract
An inertial igniter for igniting a thermal battery upon a predetermined acceleration event is provided. The inertial igniter including: a base having a first projection; a striker mass rotatably connected to the base through a rotatable connection, the base having a second projection aligned with the first projection such that when the striker mass is rotated towards the base, the first projection impacts the second projection; and a rotation prevention mechanism for preventing impact of the first and second projections unless the predetermined acceleration event is experienced.
23 Citations
13 Claims
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1. An inertial igniter for igniting a thermal battery upon a predetermined acceleration event, the inertial igniter comprising:
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a base having a first projection; a striker mass rotatably connected to the base through a rotatable connection, the striker mass having a second projection aligned with the first projection such that when the striker mass is rotated towards the base, the first projection impacts the second projection; and a rotation prevention mechanism for preventing impact of the first and second projections unless the predetermined acceleration event is experienced; wherein the rotation prevention mechanism comprises a retaining member movably disposed at least partially in the striker mass and a blocking member movably disposed in a blocking position for blocking the retaining member from moving from the striker mass unless the predetermined acceleration event is experienced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An inertial igniter for igniting a thermal battery upon a predetermined acceleration event, the inertial igniter comprising:
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a base having two or more first projections; two or more striker masses, each rotatably connected to the base through a rotatable connection, the striker mass having two or more second projections aligned with the two or more first projections such that when the striker mass is rotated towards the base, each of the first projections impact a corresponding one of the two or more second projections; and a rotation prevention mechanism for preventing impact of each of the first projections with the corresponding second projections unless the predetermined acceleration event is experienced; wherein the rotation prevention mechanism comprises a retaining member movably disposed at least partially in the striker mass and a blocking member movably disposed in a blocking position for blocking the retaining member from moving from the striker mass unless the predetermined acceleration event is experienced.
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Specification