| 摘要 |
To be able to detect that a lift cage 4 has become stuck in a lift installation and thereby prevent the drive motor 2 of the lift from continuing to function, an accelerometer 5 is placed on the lift cages or the lift cage 4, and the drive motor is provided with a tachometer 3. The signals from these are compared in comparison circuits 12, 13 so that necessary measures can be taken if deviations arise between the signals. <IMAGE> |
