Vintage Machine Tool:Root Miller by Lincoln Miller, 1854

The first departure from the conventional design of the Lincoln miller was made about 1854, when Mr. E. K. Root, who was then superintendent of the Colt Armory at Hartford, designed the miller, which embodied all the essential features of the Lincoln type, except that in this machine the outer end of the arbour is carried by a support from an overhanging arm secured to the head of the machine instead of the usual outer support resting on the bed. This construction possessed the great advantage of being what in a planer is called "open side" capable of performing operations on work that could not be passed between the head and foot stock of the Lincoln miller.