Patent ID: 8350394

Claim:
Apparatus comprising: (a) a housing; (b) a first and at least a second mass element, each said element having a range of motion within the housing; (c) an energy supply unit from which energy is accessible to devices outside the housing; and (d) at least one energy transducer coupled to the energy supply unit so as to feed energy to said unit when the transducer is activated, wherein: (e) at least the second mass element is arranged to receive collisionally transferred kinetic energy from the first mass element when the housing is in an effective state of mechanical agitation; (f) the energy transducer is arranged to be activated by relative motion between the housing and at least one said mass element other than the first, wherein said relative motion is excited by at least a portion of the kinetic energy collisionally transferred from the first mass element; and (g) at least one mass element arranged for activating the energy transducer is at least five times smaller in mass than the first mass element and is arranged so that the mass difference between itself and the first mass element causes it to undergo velocity multiplication relative to the first mass element.