Apparatus for detecting and signaling the function and status of an elevator safety brake
US5255760A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1991 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Oct 2, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2121/22
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An apparatus for detecting and signaling the function and the status of an electronically actuated two-circuit safety disk brake for elevators includes an axially moveable spring centering bolt and a sliding block attached to each of a pair of brake shoes for actuating position sensors. A force imbalance due to breakage of a brake pressure spring displaces the spring centering bolt from its neutral position and actuates a microswitch of a first position sensor by way of sliding block attached to the bolt to generate a signal to a monitoring circuit. A double switching arm formed on the sliding blocks attached to the brake shoes signals not only the normal closure and opening movements of the brake, but causes, on exceeding an admissible wear of the brake lining for the first time, an alarm switching cycle of a microswitch of a second position sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.