| 摘要 |
A device for sharpening a circular knife or saw which provides a support for the knife and is tiltable to bring the knife into and out of contact with a grinding wheel. The invention includes mechanism for turning the knife to present the next tooth or section of the knife for grinding and which includes means for counting the sections as they are sharpened and turns the device off when all sections have been sharpened. Automatic driving means are included which produce these functions in proper sequence. Included also are permanent magnets for holding the knife against vibration while still permitting turning, and a special carriage for the rod in the knife turning mechanism to keep the rod in its intended longitudinal movement. |
