Electromagnetic Inertial Switch

An electromagnetic inertial switch, comprising:

• a mass that is electrically conductive and magnetic;
• a cavity comprising a major surface and a perimeter side, wherein:
• a portion of the major surface of the cavity is electrically conductive and is electrically coupled to a first terminal of the electromagnetic inertial switch, and
• a portion of the perimeter side of the cavity is electrically conductive and is electrically coupled to a second terminal of the electromagnetic inertial switch;
• a first magnetic field configured to apply a first force on the mass to attract the mass towards the center of the cavity;
• and
• a second magnetic field configured to apply a second force on the mass to attract the mass towards the portion of the perimeter side;
• wherein:
• the mass being suspended within the cavity by the first magnetic field such that the electromagnetic inertial switch is in a high resistance state at rest and in response to an acceleration event less than a threshold acceleration;
• and
• the mass being configured to be displaced from the center of the cavity, and held against the perimeter side by the second magnetic field, the mass further configured to make electrical contact with both the portion of the major surface and the portion of the perimeter side such that the electromagnetic inertial switch is in a low resistance state in response to an acceleration event greater than a threshold acceleration.