A machine to clean knives!
Before the invention of stainless steel, knives were very hard to keep clean and shiny. If they got too wet, they would get rusty and water could leak down into the handles, which were made of wood or bone. After simply wiping the knives after use, Victorian maids would use this special knife-cleaning machine to polish them up…(read more here)
Yes, such a thing actually existed – see the picture below.