Opera hat which means hat, and "claque", which means "tap" or "click". The "chapeau claque" is thus a hat that folds with a click, and unfolds likewise. In English the hat model is usually referred to as a "collapsible top-hat", "gibus" or more often "opera hat"- The construction may originally have been inspired by an historical hat model called "chapeau bras" ("arm hat"), made as bicorne or tricorne to be carried folded under the arm On May 5, 1812, a London hatter called Thomas Francis Dollman patented a design for "an elastic round hat" supported by ribs and springs. His patent was
Top hat men's hat. The characteristic snapping sound heard upon opening a gibus suggested a third name, the "chapeau claque", "claque" being the French word for "slap". Until World War I the top hat was maintained as a standard item of formal outdoor wear by upper-class males for both daytime and evening usage. Considerations of convenience and expense meant however that it was increasingly superseded by soft hats for ordinary wear. By the end of World War II, it had become a comparative rarity, though it continued to be worn regularly in certain roles. In Britain these included holders of various positions