Abstract: A digital signaling device provides visual, audible, and haptic indicators when the digital signaling device changes state. The digital signaling device has a same operational feel and response as a classic electro-mechanical decorator-style light switch, including maintaining switch paddle position, using attractive magnetic latching in combination with a spring contact. The switch paddle can be pressed into one of two positions, each position representing a different state of the digital signaling device. The switch paddle provides a visual indicator of the digital signaling device state in that the switch paddle is maintained in one of the two positions. The attractive magnetic latching provides both an audible and haptic indicator when the magnet pairs are engaged, which corresponds to a change of state of the digital signaling device. The spring contact provides a digital switching mechanism for changing the state of the digital signaling device.

Abstract: A method for machining a rotor having a disc and a plurality of integral airfoils projecting outwardly from the disc, according to one aspect of the invention, comprises a step of machining each airfoil with a disc tool having a grinding periphery thereof adapted for removing material from the airfoils. The grinding periphery has a thickness greater than a thickness of an adjacent supporting portion of the disc to permit the grinding periphery to pass a surface of an airfoil in a multi-axis simultaneous motion, thereby matching the grinding periphery with a predetermined geometry of a portion of the airfoil.