McKenna Process Company
Plant formerly located in Joliet, Illinois - ca. 1920.
US Patent No. 2,034,046 by George Langford, Sr., granted March 17, 1936
Here is the link to the USPTO website: US Patent No. 2,034,046
US Patent No, 2,034,046 issued to George Langford, Sr., March 17, 1936
US Patent No. 2,034,046 issued to George Langford, Sr.
Note by George, III:  The model splice bar at left was found in George, Sr.'s effects and given to me by George, Jr.  It is made of brass and is about seven inches long.  It displays the indentations made by the McKenna bar re-forming process that enables the bar to grip the rails tightest where there is the most wear.