A tensioning device and a tensioning method for a steel wire rope of a cage guide of an ultra-deep vertical shaft. The tensioning device comprises an upper rope clamping device, a rope adjustment guide frame, a lower hydraulic rope locking device, and a lower hydraulic rope adjustment device. The upper rope clamping device is provided with a rope clamp and a pressure sensor. The rope adjustment guide frame comprises a steel frame body, double fixed clamp-plates, a balance weight, and a balance weight steel wire rope. Double moving clamp-plates are disposed in a guide groove of the steel frame body. The double moving clamp-plates are provided with a rope clamp and a lower guide pulley. The double fixed clamp-plates are provided with an upper guide pulley. The balance weight is provided with a fastening joint. Each of the upper rope clamping device, the lower hydraulic rope locking device and the lower hydraulic rope adjustment device comprises a wedged iron block and a shim. Each of the lower hydraulic rope locking device and the lower hydraulic rope adjustment device further comprises a lever wedge adjustment mechanism and a wedge adjustment hydraulic cylinder. A wedge adjustment hydraulic pressing rod is connected to the wedged iron block. The bodies of the wedge adjustment hydraulic cylinders are connected to the shims. The tensioning device and the tensioning method can be used for implementing automatic adjustment and control of the tensile force of the steel wire rope of the cage guide of the ultra-deep vertical shaft.

A top module for closing off an elevator shaft of an elevator system has a first top module side wall and a top module ceiling, a first guide rail piece fixed by a bracket on the first top module side wall, and a drive unit connected to the first guide rail piece. The top module can assume an operating state and a transport state. In the operating state, the first guide rail piece and the drive unit assume operating positions, and a car of the elevator system can be moved in the elevator shaft closed off with the top module. In the transport state, the first guide rail piece and the drive unit assume transport positions that deviate from the operating positions.

Examples of the present disclosure describe systems and methods of issuing certificates. One embodiment includes a non-transitory, computer-readable medium comprising computer executable instructions stored thereon, the computer executable instructions executable for receiving a certificate request from an online identity, wherein the certificate request validates a reputation of the online identity, analyzing the certificate request, based on the analysis, determining to issue a certificate, and issuing the certificate to the online identity.