Ciekawostka: Jefferson invented the dumbwaiter, the monetary system, and the folding attic ladder

Evidence: 49 • authority: 72

A dumbwaiter is a small freight elevator or lift intended to carry food. Dumbwaiters found within modern structures, including both commercial, public and private buildings, are often connected between multiple floors. When installed in restaurants, schools, hospitals, retirement homes or private homes, they generally terminate in a kitchen. The term seems to have been popularized in the United States in the 1840s, after the model of earlier "dumbwaiters" now known as serving trays and lazy Susans. The mechanical dumbwaiter was invented by George W. Cannon, a New York City inventor. He first filed for the patent of a brake system (US Patent no. 260776) that could be used for a dumbwaiter on…

Evidence: — • authority: 35