Patent ID: 8161879

Claim:
A switch circuit, comprising: an accelerometer comprising a non-rigid membrane configured to generate a signal in response to a displacement of the non-rigid membrane caused by an acceleration of the switch circuit, wherein the signal proportional to a level of displacement of the non-rigid membrane; a latch in communication with the accelerometer and configured to transition from a first state to a second state in response to the signal, wherein: the latch inhibits transmission of an electrical current above a predetermined threshold out of the switch circuit in the first state; and the latch does not inhibit transmission of the electrical current out of the switch circuit in the second state; and a chamber coupled to the accelerometer and disposed on a first side of the non-rigid membrane wherein the chamber forms an enclosed volume of gas for controlling sensitivity of the accelerometer to the acceleration by adjusting an effective inertial mass of the non-rigid membrane.