Patent for a new and improved gauge for planer knives. This design is "for use in planing and other mills where side heads are used to supply the need of a convenient appliance for holding the side heads in best position for filing, sharpening, or setting the bits, to afford a strong machine for holding the side heads firmly and securely in any position that the work[person] may desire while sharpening or adjusting the bits to the desired pattern" (lines 30-38).