Abstract: This invention pertains to a novel paint brush with inverted bristle clamping panel, a removable bristle pack and a panel hinge yield mechanism. The paint brush provides ready cleaning after use by disengaging the hinged inverted bristle clamping panel, removing the bristles and thereby exposing all of the bristles to the cleaning solution. The panel has a resilient release mechanism which yields slightly when undue force is applied to the inverted hinged panel against the bristles.

Abstract: A mouse encoding device that includes an operating interface for the user to operate on and a sensing device for sensing user input through the operating interface in order to modulate light pulses and generate encoded electrical signals. Through the rotation of a wheel in the mouse device, a mechanically linked photo-grid wheel is driven to generate a series of encoded signals. Furthermore, the wheel can move slightly in the vertical direction so that an activating switch can be turned on or off to produce yet another signal. Therefore, the movement of a mouse by a user is fully tracked.