Chain saw sharpening guide

Claim 2

A guide for sharpening chain saw blades comprising: an elongated member having first and second planar faces, said planar faces being orthogonally disposed relative to each other; a strip of magnetic material affixed to said first face, said magnetic material allowing said guide to be magnetically positioned adjacent to the bar of the chain saw so that said second planar face extends orthogonally outwardly from said chain bar, said second planar face having a plurality of indicia thereon, said indicia being positioned on said second planar face to visually indicate the angle at which a filing device is to be held during filing of a chain saw tooth; and gauge means formed in the second planar face, the gauge means being positionable immediately adjacent to the cutting edge of the chain saw tooth for gauging the optimum shape of the cutting edge of the chain saw tooth.

Claim 3

A guide for sharpening the cutting edges of chain saw teeth with a file, and for gauging the curvature of the cutting edges comprising: an elongated L-shaped member having first and second planar faces, said planar faces being orthogonally disposed relative to each other; a strip of magnetic material affixed to said first planar face, said magnetic material allowing the guide to be magnetically positioned adjacent to the bar of the chain saw that said second planar face extends orthogonally outwardly from said chain bar, said second planar face having a plurality of indicia thereon, said indicia being positioned on said second planar face to visually indicate the angle at which the file is to be held during sharpening of a chain saw tooth; and notches formed in the second planar face at the opposing ends of the L-shaped member, said notches being shaped to duplicate the optimum curvature of the cutting edge of a chain saw tooth, said notches being positionable immediately adjacent to any cutting edge of a chain saaw tooth for gauging the shape of the cutting edge, said notches being configured and arranged so that the file does not contact the notches during sharpening of the chain saw tooth.

Claim 4

A guide for sharpening the cutting edges of chain saw teeth with a file, and for gauging the curvature of the cutting edges comprising: an elongated L-shaped member having first and second planar faces, said planar faces being orthogonally disposed relative to each other; a strip of magnetic material affixed to said first planar face, said magnetic material allowing the guide to be magnetically positioned adjacent to the bar of the chain saw that said second planar face extends orthogonally outwardly from said chain bar, said second planar face having a plurality of indicia thereon, said indicia being positioned on said second planar face to visually indicate the angle at which the file is to be held during sharpening of a chain saw tooth; and notches formed in the second planar face at the opposing ends of the L-shaped member, said notches being shaped to duplicate the optimum curvature of the cutting edge of a chain saw tooth, said notches being positionable immediately adjacent to any cutting edge of a chain saaw tooth for gauging the shape of the cutting edge, said notches being configured and arranged so that the file does not contact the notches during sharpening of the chain saw tooth.