An accelerometer unit characterized by first and second piezo-electric elements (5, 6) mounted upon opposed surfaces of an electrically conductive sheet, plate or the like (1), and in that the sheet, plate or the like is adapted to be centrally supportable by support (12) such that the first and second...http://www.google.com/patents/US5063782?utm_source=gb-gplus-sharePatent US5063782 - Accelerometers and associated control circuits
