Warning device using power tool residual kinetic energy

摘要: A warning and braking device for use on a power cutting tool such as circular saw or lawnmower comprises generator, drive shaft pulley connected by lever to the on/off switch. When is in working "on" position, generator assembly does not contact belt no electric current produced generator. switch shifted off however, brought into with belt, exerting force producing an electrical signal from which light siren.