An inertial mass detection device. An illustrative embodiment of the device includes a generally elongated ball track, at least one pair of spaced-apart switch contacts provided on the ball track, a battery connected to a first one of the at least one pair of spaced-apart switch contacts, at least one...http://www.google.fr/patents/US7411140?utm_source=gb-gplus-shareBrevet US7411140 - Inertial mass detection device
