Patent ID: 6329618
Filing Date: 2001-12-11
Classification: H01H

Abstract:
A shock sensor comprising:a first ferromagnetic lead;a second ferromagnetic lead;a glass capsule hermetically sealed about the first ferromagnetic lead and the second ferromagnetic lead, the glass capsule defining an interior volume;a first ferromagnetic reed positioned within the glass capsule and extending from the first lead, the first reed having a first electrical contact area;a second ferromagnetic reed positioned within the glass capsule and extending from the second lead, the second reed having a second electrical contact area, the second electrical contact area positioned to overlie the first electrical contact area;a magnetic mass, which forms a shock sensing mass, mounted within the interior volume of the glass capsule, wherein the magnetic mass is mounted for motion between a first position, where the magnetic field produced by the magnetic mass is insufficient to cause the first electrical contact area to be moved against the second contact area, and a second position, where the magnetic mass imposes sufficient magnetic field to cause the first electrical contact area to engage the second electrical contact area to produce a closed-circuit between the first lead and the second lead; anda biasing member, biasing the magnetic mass away from the second position.