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US Patent: 77,211
Cutting Tool for Planing Machines
Improvement in Cutting Tools for Planing and Milling Machines
E. T. Prindle - Aurora, Kane County, IL

USPTO Classifications:

Tool Categories:
metalworking machines : metal planers : metal planer tools


Not known to have been produced

C. F. Geyer
George L> Richards

Patent Dates:
Granted: Apr. 28, 1868

Reissue Information:
Reissued as RE9,738 (Jun. 07, 1881)

Patent Pictures:
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The nature of this invention consists, first, in substituting for the tools ordinarily used upon planing and slotting machines one in which the cutting part is easily detached, and others substituted, without removal from the tool-post;

second, in so constructing the cutter that while firmly held in place during the forward or cutting stroke it may rise and pass over the work while moving backward, thereby avoiding injury to the cutting point or edge by being dragged;

third, in relieving the pinion which the cutter turns of all strain by the use of a shoulder upon the back of the cutter and a set-screw in the end of the shank;

fourth, in providing means whereby the cutters can be so adjusted as to bring them in contact with the work at .any angle desired;

fifth, in its adaptation to any planing or slotting machine without alteration of the toolpost; sixth, in the use of a spiral spring so arranged that while allowing the cutter to rise by being drawn backward over the work it presses it firmly into place as soon as released.

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