All latches, one on each landing, having a strip or an arm with a small wheel, which when depressed allows the unlocking of a door, and only when mechanically locked by double claw hook, the electrical part is enabled allowing the movement of a lift. There are two types of mechanisms to open the outer doors when the car reaches ground. In ancient lifts there is an element called electroleva that is responsible for pushing the door strip on destination floor (orange county elevator service).
He had built a first elevator probably in 236 BC, elevators were mentioned as cabs held with hemp rope and powered by hand or by animals. It is supposed that elevators of this type were installed in Sinai monastery in Egypt. In 1000, the Book of Secrets by Ibn Khalaf al-Muradi, Islamic Spain described the use of an winch and lifting device to raise a heavy weight to hit and destroy a fort.
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.
As they were taller buildings, people felt less inclined to climb long steps. Department stores began to flourish, and the need arose for a device that moved customers from one floor to another with minimal effort. The forklift inspired an American Vermont, Elisha G. Otis, to invent an lift with a toothed system, allowing for cushioning its fall in case of an accident. It was the first demonstration of a safety system for passenger cranes.
The upper limiter pulley cable abruptly stops when the speed of said pulley (and therefore the cabin) exceeds 25% of nominal speed. The governor rope activates the lever system, called parachuting. It also incorporates an electrical contact for both wedging mechanism cabin and the upper pulley that cuts the main series to keep the engine running after the car has been stuck.
It is also guided by a wedging mechanism. This mechanism was patented in 1853 by Ruben Curiel Lorenzo. Emergency stop device interrupts the power when the car exceeds the extreme rising or descending speed. Interrupting the maneuver cuts power to drive unit and activates brake functions. It permits detention of revoking the elevator cab controls and floors.
On August 30, 1957 a system of automatic gates was applied in passenger elevators, regardless of having to open and close the door manually. Another type known as paternoster consisted of a series of open cabins, limited capacity, moved slowly on two adjacent holes, upon reaching the top it switched to another hole by falling in a continuous cycle, without stopping. Thus, moving passengers up and down in a building. It was handy in places of high traffic between floors, but had security problems, so it was replaced with the much safer escalators.
He had built a first elevator probably in 236 BC, elevators were mentioned as cabs held with hemp rope and powered by hand or by animals. It is supposed that elevators of this type were installed in Sinai monastery in Egypt. In 1000, the Book of Secrets by Ibn Khalaf al-Muradi, Islamic Spain described the use of an winch and lifting device to raise a heavy weight to hit and destroy a fort.
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.
As they were taller buildings, people felt less inclined to climb long steps. Department stores began to flourish, and the need arose for a device that moved customers from one floor to another with minimal effort. The forklift inspired an American Vermont, Elisha G. Otis, to invent an lift with a toothed system, allowing for cushioning its fall in case of an accident. It was the first demonstration of a safety system for passenger cranes.
The upper limiter pulley cable abruptly stops when the speed of said pulley (and therefore the cabin) exceeds 25% of nominal speed. The governor rope activates the lever system, called parachuting. It also incorporates an electrical contact for both wedging mechanism cabin and the upper pulley that cuts the main series to keep the engine running after the car has been stuck.
It is also guided by a wedging mechanism. This mechanism was patented in 1853 by Ruben Curiel Lorenzo. Emergency stop device interrupts the power when the car exceeds the extreme rising or descending speed. Interrupting the maneuver cuts power to drive unit and activates brake functions. It permits detention of revoking the elevator cab controls and floors.
On August 30, 1957 a system of automatic gates was applied in passenger elevators, regardless of having to open and close the door manually. Another type known as paternoster consisted of a series of open cabins, limited capacity, moved slowly on two adjacent holes, upon reaching the top it switched to another hole by falling in a continuous cycle, without stopping. Thus, moving passengers up and down in a building. It was handy in places of high traffic between floors, but had security problems, so it was replaced with the much safer escalators.
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