An ad in Engineering News-Record, 8 October 1931, for the Vulcan Pile Extractor. It was used to extract arch web Lackawanna sheeting by the P.J. Kennedy & Co. of Holyoke, MA. Vulcan touted the advantages of a “single purpose machine” (as opposed to MKT’s multipurpose hammer/extractors. MKT must have gotten the message, they developed the E-2 and E-4 to compete with the Vulcans.)
An earlier ad for the hammers (more information about the project that inspired it here) showed two distributors; in this one Vulcan was up to three. There would be many more.