Sperry made your stand, called the Perfected Apparatus Stand, and another model, called the Common Retort Stand. The Common Retort Stand had a heavy square base, instead of the cross-style stand on yours. In an early 1900's catalog, they offered two versions of the Perfected Apparatus Stand. One that looks just like the photos you posted and one with and added clamp that attached above the three rings. Your stand cost $2.50 back then. With the clamp, it was $4. Sperry made a wide variety of things. A few pages earlier in the catalog, they have Sperry’s Hog Scalder. It came in two sizes - 85 and 150 gallons.
The factory burned down two years after this catalog was printed. Check out the Foundries Info section for more information about them.