Importance

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Abstract

An input device in the form of a manually moveable unit or 'mouse' provides coordinate-data information responsive to movement of the mouse across a planar surface. The mouse includes at least one manually operable button for changing a ratio of distance of mouse movement across the planar surface to an amount of coordinate-data information value change. This results in the ability to scale shapes or objects, the coordinates of which are to be input using the mouse, by selectively activating the ratio change button. To permit accurate tracing and scaling, the mouse includes a star shaped ordinate plate having a plurality of radial arms, each having a different shaped pointer. Each arm slidably engages into a corresponding groove in the mouse so that an opposite end of the ordinate plate is positioned for tracing the image to be input.

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First Claim