Top hat ribs and springs. His patent was described as: Some sources have taken this to describe an early folding top hat, although it is not explicitly stated whether Dollman's design was specifically for male or female headgear. Dollman's patent expired in 1825. In France, around 1840, Antoine Gibus's design for a spring-loaded collapsible top-hat proved so popular that hats made to it became known as "gibus". They were also often called "opera hats" due to the common practice of storing them in their flattened state under one's seat at the opera, though the term can also refer to any tall formal
Chapeau performance. In the Anglophone heraldries, a "chapeau" or cap of maintenance is a specific kind of hat. It occurs as a charge, but also more importantly as an exterior ornament, signifying rank. The use of the chapeau in English heraldry is not as clear cut and regulated as in Scotland. Chapeau "Chapeau" is a French term signifying a hat or other covering for the head. In mainland European heraldry, it is used as a mark of ecclesiastical dignity, especially that of cardinals, which is called the "red chapeau". It is worn over the shield by way of crest, as mitres