Scold's Bridle

"Scold skold, n. a rude clamorous woman or other."

-Chambers English Dictionary

"Branks brangks, (Scot.) n.pl., rarely in sing., a scold's bridle; an instrument of punishment used in the case of scolds, etc., consisting of a kind of iron framework to enclose the head, having a sharp metal gag or bit which entered the mouth and restrained the tongue."

-Oxford English Dictionary