REED SWITCH WITH SHOCK SENSING MASS

摘要

A shock sensor (20) has a magnetic shock sensing mass (34) that rides on the inside of a glass capsule (30) that is sealed about a reed switch. The reed switch has a first stop (38) positioned so that the magnetic shock sensing mass when resting against the first stop does not cause the reeds (24,28) of the reed switch to attract. A spring (36) extends between the magnetic shock sensing mass and a second stop (40). Acceleration causes the magnetic shock sensing mass to accelerate toward the second stop. The motion of the magnetic shock sensing mass causes the switch reeds to attract and close the reed switch. The entire shock sensing mechanism is hermetically sealed inside of the glass capsule (30) of the reed switch. The reed switch inside the glass capsule detects movement of the magnetic shock sensing mass.