Patent ID: 6936953
Filing Date: 2005-08-30
Classification: H01H,H02N,Y02B,Y04S

Abstract:
1. A method of operating a piezo-active device including a piezo-electric element and an elastically deformable shell with a substantially closed profile to produce AC output, said piezo-electric element being disposed in said shell, the method comprising the steps of: connecting output terminals of said piezo-electric element to input terminals of an electrical circuit adapted to receive an alternating current power-supply; and supplying power from the piezo-electric element to said electrical circuit by exerting a punctual mechanical action on said device and then allowing it to resonate freely so that, subsequently to said punctual mechanical action, said piezo-electric element produces an alternating current voltage between its output terminals and therefore between the input terminals of said circuit; wherein the piezo-electric element is structured to resonate as a mechanical oscillator following the punctual mechanical action.