Kean v. Detroit Copper & Brass Rolling Mills

The defendant in this case is a manufacturer of copper and brass materials, having its place of business in the city of Detroit, and in its works has a machine called'the “Breakdown Rolls,” the purpose of which is to reduce bars of the metal to thin plates. The rolls are about 10 inches in diameter and 40 inches long, and run together at a speed of about 13 revolutions a minute. When used they are placed from an eighth of an inch to an inch apart, according to the thickness of the plate desired to be made. Oil is used upon the rolls, and they have to be cleaned from one to three times a day.…