A fire rescue system has a vertical rail on which a carriage can roll under an automatically controlled braking effect on which a person or load may be suspended

摘要

The T-section rail (2) carries a U-section housing (3) having rollers (4,6) and arms (10a) carrying the contact hook (11b) and a brake block (7b) bearing on the rail surface (7a) to control the rate of descent controlled by a counterweight (14a) through a lever (14) and spring (17).