Inertial

US12613084 - Inertial delay mechanisms for low-G and long-duration acceleration event detection and for initiation devices in munitions and impulse switches and the like

An inertial mechanical delay mechanism including: a first member rotatable about a first axis in a first direction. The first member having a first center of mass offset from a line parallel to a direction of acceleration and perpendicular from the first axis. A first elastic material exerts a first biasing force to the first member to bias the first member in a second direction. A second member is rotatable about a second axis in a third direction. The second member rotatable in a third direction by at least indirect interaction with the first member when the first member rotates a first angle in the first direction. A second elastic material exerts a second biasing force to the second member to bias the second member in a fourth direction. The first member is configured to rotate the first angle when the acceleration is greater than a predetermined magnitude and duration.