The concept of FUJI elevator was first published in 1895
Mounting a rope brake in the hoistway requires determining that the clearances are Buy Elevator. Depending on whether the unit is mounted to act upon the hoist ropes that drop to the car or the counterweight, the buffer stroke, runby and 1/2 the gravity stopping distance have to be taken into account as they affect the clearances. To allow for rope stretch, the counterweight runby varies and is typically greater than the car runby, which remains static. For this reason and due to frequently greater clearance above the counterweight, it is often feasible to locate the rope brake at the rope drop to the counterweight when there is insufficient clearance to locate it at the rope drop to the car.
Care must be taken in mounting the rope brake that the travel of the hoist ropes does not vary outside of the open dimension of the brake linings. This can be an issue when the unit is mounted in the overhead either on the rope drop to the car or to the counterweight. Some elevator companies designed and installed traction elevators where the hoist rope drops were not plumb. This was done in some cases to eliminate the deflector sheave and the drive sheave diameter was less (or more) than the horizontal distance between the car and the counterweight rope hitches on elevators roped 1:1. This condition also occurs on many traction elevators, especially gearless, that are roped 2:1 and standard diameter sheaves were used, resulting in the ropes travelling out of plumb.
A space elevator is a proposed type of space transportation system. Its main component is a ribbon-like cable (also called a tether) anchored to the surface and extending into space. It is designed to permit vehicle transport along the cable from a planetary surface, such as the Earth's, directly into space or orbit, without the use of large rockets. An Earth-based space elevator would consist of a cable with one end attached to the surface near the equator and the other end in space beyond geostationary orbit (35,800 km altitude). The competing forces of gravity, which is stronger at the lower end, and the outward/upward centrifugal force, which is stronger at the upper end, would result in the cable being held up, under tension, and stationary over a single position on Earth. Once the tether is deployed, climbers would repeatedly climb the tether to space by mechanical means, releasing their cargo to orbit. Climbers would also descend the tether to return cargo to the surface from orbit.
The concept of a space elevator was first published in 1895 by Elevator Manufacturers. His proposal was for a free-standing tower reaching from the surface of Earth to the height of geostationary orbit. Like all buildings, Tsiolkovsky's structure would be under compression, supporting its weight from below. Since 1959, most ideas for space elevators have focused on purely tensile structures, with the weight of the system held up from above. In the tensile concepts, a space tether reaches from a large mass (the counterweight) beyond geostationary orbit to the ground. This structure is held in tension between Earth and the counterweight like an upside-down plumb bob.