Patent ID: 8281719
Filing Date: 2012-10-09
Classification: F42C

Abstract:
1. A power supply for providing electrical energy in a projectile, the power supply comprising: a movable mass; at least one elastic element attached to the mass at one end for storing mechanical energy upon a firing acceleration of the projectile; at least one piezoelectric element attached to another end of the at least one elastic element for converting the stored mechanical energy to electrical energy upon a vibration of the mass and at least one elastic element to apply a cyclic force to the at least one piezoelectric element; a first mechanism comprising a first member for engaging the movable mass and displacing the movable mass into a position to store the mechanical energy in the at least one elastic element due to a firing acceleration of the projectile; a second mechanism comprising a second member for engaging the mass and locking the mass and at least one elastic element in the position such that the second member is disengaged with the mass after an expulsion acceleration of the projectile to vibrate the mass and the at least one elastic element to apply the cyclic force to the at least one piezoelectric element and to generate the electrical energy.