Progressive safety

Details Progressive safety Progressive safety

B - Operations, Transporting

66

B

187/14

B66B 5/18 (2006.01) B66B 5/22 (2006.01)

Patent

CA 1220145

Progressive Safety Abstract A safety device for stopping an elevator car or counterweight has a brake shoe 5 on one side of a guide rail 3, and, on the other side, two leaf springs 11,12 and a roller 8. The springs 11,12 define a tapered area 22, and the roller 8 is pulled by a governor to engage the rail 3, which trips the roller, causing it to be forced into the tapered area and forcing the brake shoe 5 against the rail 3. The roller engages a soft metal stop 16 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.

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