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
Top hat also wear top hats on special occasions. The custom is said to have started at the Bevis Marks Synagogue in London on a hot day, when the "Chazzan" was preparing for a service and decided that it was too hot to wear his wig, throwing it out of the window in a fit of bad temper. He then found that his tricorn hat was too big, as it had been made to fit over the wig, and so wore his top hat instead. Notes Further reading Top hat A top hat, beaver hat, high hat, silk hat, cylinder hat, chimney