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 (company) recognized by numerous awards including Canadian Innovation Exchange Top 20 Program, "Best Canadian Startup of the Year" at the TechVibes Canadian Startup Awards, and Pauli Award for Company of the Year. Educators are able to adopt, customize and sell digital textbooks and course materials on the Top Hat Marketplace. Teachers can also collaborate with one another to create and update teaching material. Currently, 90 percent of course materials in the Marketplace are free. Top Hat Test allows educators to create and administer tests and assessments. Top Hat (company) Top Hat is a Canadian educational software company with its headquarters in