However, if the cable broke — releasing its tension — springs behind the levers would force them outwards into grooves in the elevator rails, those rails were then forced against the shaft walls, quickly arresting any cars fall.

然而，如果缆绳断裂——释放拉力——杠杆后面的弹簧就会迫使杠杆向外进入电梯轨道的凹槽，然后这些轨道就会被压在井壁上，迅速阻止任何坠落的电梯轿厢。