An acceleration sensing and safety-device actuating system, for actuating a safety device, such as a crash-sensitive automobile air bag detonator. A differential amplifier forms part of an operational integrator responsive to an acceleration sensor and a reference potential. A threshold device, responsive...http://www.google.com/patents/US4020453?utm_source=gb-gplus-sharePatent US4020453 - Sensing system for actuating a safety device
