History of Elevators
Elevators are a commonplace fixture in multi-story or high-rise buildings in all parts of the globe. They are often taken for granted since they have become so universally adopted but we only need to look at the history of them to see what engineering marvels they are. Early elevators were mentioned in Roman texts as being developed by Archimedes in around 236 B.C. but these were basically small cabs attached to a rope and were operated by human or animal power. Different types of elevating mechanisms were developed in the 18th and 19th century. In Russia, a man named Ivan Kulibin designed an elevator in 1793 that used a screw mechanism to raise and lower the unit. During the 19th century there were many types of elevators employed but they were very simple devices used primarily to carry cargo. They used hydraulics to operate the elevators employing a pump that would apply water pressure sent through a steel column to make the elevator ascend and descend. They used a system of counterbalances to prevent the hydraulic system from carrying the full load but it was not a practical system, especially for taller structures since the hydraulic system had to be buried in the ground as deep as the building was tall.
Elisha Otis developed the safe type of elevator we are familiar with in 1852. A set of rollers would lock the elevator into place if something happened and the elevator began to drop too fast. He gave a demonstration of it in 1854 at an exposition at New York’s Crystal Palace. Otis passenger elevators were first installed in a building on Broadway in New York. Actually, during the construction of the Cooper Union building in 1853, Cooper included an elevator shaft in his design because he was certain someone would develop a practical passenger elevator. The Otis Elevator Company (owned by United Technologies Corp.) is the largest manufacturer of elevator equipment in the world. Stairs were actually banned from new building construction in 1962 but that was soon changed as wisdom prevailed.
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Residential elevators were first created by Clarence Crispen in 1929 and he also invented the stairlift which plays a vital role in helping the elderly and the handicapped navigate stairs. So the next time you ride in an elevator, don’t be surprised if you look down and see the name Otis printed on it. | |||||||||||
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Long before it became ingrained in the cultural lexicon as America’s first “escape proof” prison, Alcatraz Island was “White Rock” to the native Ohlone tribe, due the pelican droppings that littered its surface. With the exception of occasional outings to scout for Murre eggs, they largely avoided the rocky 22-acre islet — the belief being that it was a lair of evil spirits and a portal to the next world. Foreshadowing its future use as a penitentiary, especially pernicious violators of tribal law would we be banished to the island, where they would most certainly die of exposure.
The Spanish first reached the island in the 1769, naming it “La Isla de los Alcatraces” or “Island of the Pelicans,” but assigned little importance to it. The Mexican governor eventually sold it to one Julian Workman in 1849, who, within months, had hawked for it $5000 to a new owner. The United States government sued for ownership, realizing its potential as strategic outpost in the Golden Gate strait and began devising plans for a lighthouse, and later, a fort at Alcatraz.
The island’s fort was completed in 1859 and with it came a squadron of 200 men – and Alcatraz’s first four prisoners, military offenders all. Two years later, the Department of the Pacific designated Alcatraz their official disciplinary barracks and, for the whole of the Civil War, a separate wing would be used to keep Confederate prisoners and sympathizers under lock and key – including one group of that had attempted a raid on Alcatraz with stolen schooner in March 1863 before being apprehended.





