| 摘要 |
A safety device for stopping an elevator car or counterweight has a brake shoe on one side of a guide rail, and, on the other side, two leaf springs and a roller. The springs define a tapered area, and the roller is pulled by a governor to engage the rail, which trips the roller, causing it to be forced into the tapered area and forcing the brake shoe against the rail. The roller engages a soft metal stop when the device is operated and this stop is worn away during each operation, which permits the roller to move higher on each operation; this compensates for any wear on the brake shoe. The governor is attached to the car or counterweight. |
