Charles Hartman of Sandwich was an employee of Sandwich Manufacturing Company for many years. In 1919 he applied for a patent for improvements to a hay loader. His patent mentions a machine that was originally patented by August Otto Jr in 1914, and we will provide a link to that patent also. This picture was taken many years later, Mr. Hartman is in the front row, sitting on the barrel.
Below is a link to each patent, containing all the verbiage and illustrations
