An elevator or lift is a vertical transport system designed to move people or goods between different levels. It can be used to ascend or descend in a building or in an underground construction. It consists of mechanical, electrical and electronic parts that work together to achieve a safe means of mobility. The initial reference to an orange county elevator service appears in the works of the Roman architect Vitruvius, who says of Archimedes (ca. 287 BC – Ca. 212 BC).
This electroleva is retractable, ie traveling with cabin retracted not to press the strips of each floor through which passes (which would allow the opening of each of the doors and stopping the elevator). The reverse process occurs when the lift is required on another floor: the electroleva retracts before departure and only expands when it reaches the floor.
In the seventeenth century, there were prototypes in some buildings. Ancient and medieval lifts used drive systems based on crane mechanisms. The invention of another system based on the screw drive was perhaps the most important technology, which ultimately led to the creation of modern passenger variants.
The counterweight is also led by guides. Its function is exactly load balancing to facilitate the work of the engine and not force too much to handle the same load. Tractors crane groups are usually formed by a motor coupled to a speed reducer, whose output shaft is mounted sheave trailing cables by adhesion. In the lower or upper ends of car frame is a safety system, whether instantaneous or gradual.
This system releases wedges against the guides to stop the car in case you get off at the wrong speed limit, preventing the car from falling freely even in the event that all cables are holding the cab are severed. In elevators today and according to regulations in each country or region also slows uphill, ie when the car goes. Sometimes a braking system is also installed in the counterweight.
Oddly enough, Elisha Otis’s talent as a designer was discovered while working as a master mechanic in a factory making bed frames Albany (New York State). He invented many labor-saving devices, and so was sent to New York, where he could better use his ability. There he designed and built the first lift with automatic safety mechanism in case there was any fault in a cable.
Currently, lifts operate controls with electronic microprocessors using artificial intelligence algorithms to determine how to manage the response to requests for coordinating the various teams to work together. It was also invented by Otis in 1979. The boxes detect system errors, which in case of failure is displayed by an error code so that the lift mechanic knows the reason for stopping.
Keep in mind that an lift has multiple safety devices to prevent any accidents and if any device fails, the elevator is automatically stopped. Any old lift has contacts on exterior doors, car doors, which break contact of cables. System security is a key element and to maximize this aspect several specific devices are used. An electromechanical door interlock helps access to the floors, making it impossible to open all doors except the floor in the cabin.
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