Patent ID: 8051758
Filing Date: 2011-11-08
Classification: F16D,F16P,Y10S,Y10T

Abstract:
1. A detection system for a power tool having a rotating component and a trigger that is depressed by a user to operate the power tool, comprising: an optoisolator circuit configured for isolating a high voltage input from a power supply at a first part of the power tool, and for applying a lower voltage to a trigger plate mounted on said trigger, said trigger plate being configured to be in contact with a user during operation of the power tool to provide a differential in voltages on the power tool; a sensor configured for sensing a voltage drop on said trigger plate of the power tool when the user contacts the rotating component; wherein when said sensor senses said voltage change for a predetermined duration, said sensor emits an actuating signal to actuate a solenoid or a relay.