The original lifts complete with their hydraulic mechanism were completely scrapped in 1982 after 97 years of service.
The door's hydraulic mechanism was obviously set so that the heavy fire door would close slowly and gently, rather than with a crash.
During the Renaissance, mankind became fascinated by hydraulic mechanisms.
Like Hero, he experimented with water clocks and other hydraulic mechanisms.
The sheer speed with which the hydraulic mechanisms worked was impressive.
The brakes were now controlled using a hydraulic mechanism.
For the drive a hydraulic mechanism is used with servovalves to control the oil flow.
A hydraulic mechanism adjusts the height from 20 to 30 inches.
A hydraulic mechanism is closed and so less likely than a cable mechanism to suffer from contamination.
It is thought they may have used a hydraulic mechanism.