The Collaborative International Dictionary
Conformator
Conformator \Con"for*ma`tor\, n. [L., a framer.] An apparatus for taking the conformation of anything, as of the head for fitting a hat, or, in craniometry, finding the largest horizontal area of the head.
Wiktionary
conformator
n. An apparatus used to take the conformation of part of the body in order to produce something that will fit it (especially of the head, for a hat)