Blade drop for power device and method of manufacturing thereof

摘要

A table saw in one embodiment a swing arm movable along a swing arm path between a first swing arm position adjacent a latch hold mechanism and a second swing arm position spaced apart from the latch hold mechanism, a blade supported by the swing arm, a charge coupling plate mounted in close proximity to the blade so as to form a capacitor, an actuating device configured to transfer a force to the swing arm when the swing arm is maintained at the first swing arm position resulting in a bias on the latch hold mechanism, and a control system configured to control the actuating device to transfer the force to the swing arm in response to a sensed change in capacitance of the capacitor.

主权项

1. A table saw, comprising:
a swing arm movable along a swing arm path between a first swing arm position adjacent a latch hold mechanism and a second swing arm position spaced apart from the latch hold mechanism; a blade supported by the swing arm; a charge coupling plate holder supported by the swing arm; a charge coupling plate mounted to the charge coupling plate holder with a plurality of screws and having a plurality of springs located between the charge coupling plate and the charge coupling plate holder, the charge coupling plate electrically isolated from the swing arm by the charge coupling plate holder and mounted in close proximity to the blade so as to form a capacitor; an actuating device configured to transfer a force to the swing arm when the swing arm is maintained at the first swing arm position resulting in a bias on the latch hold mechanism; and a control system configured to control the actuating device to transfer the force to the swing arm in response to a sensed change in capacitance of the capacitor.