Patent ID: 7559238

Claim:
An inertial shock bandpass filter device for detecting a shock event between first and second acceleration levels, comprising: a primary inertial element; at least one secondary inertial element; a first support structure for said primary inertial element; a first spring arrangement connecting said primary inertial element to said first support structure; a second support structure for said secondary inertial element; a second spring arrangement connecting said secondary inertial element to said second support structure; a latch; and a common support, wherein said primary inertial element including a latch arm for latching with said latch when said primary inertial element moves far enough in response to an acceleration between said first and second acceleration levels, wherein said primary inertial element and said secondary inertial element including complementary engageable gripping surfaces which engage in response to an acceleration above said second acceleration level, said engagement preventing movement and latching of said primary inertial element, wherein an acceleration level below said first acceleration level is insufficient to cause either engagement of said gripping surfaces or latching of said latch arm with said latch, wherein said first support structure includes a first spaced-apart support and second spaced-apart support, wherein said first spring arrangement includes a first spring and a second spring, which connect said primary inertial element to said first spaced-apart support, and a third spring and a fourth spring, which connect said primary inertial element to said second spaced-apart support, wherein said at least one secondary inertial element comprises a first secondary inertial element and a second secondary inertial element, and wherein said first secondary inertial element and said second secondary inertial element are connected by said second spring arrangement to said first spaced-apart support and said second spaced-apart support as well as to said common support.