Mobile crane tipping movement limitation equipment - has digital computer and distributor for signals to processing units

摘要

The equipment limits the tipping moment of a mobile crane, the latter having a slewing superstructure with a derricking variable-length jib. An actual-value emitter indicates the moment acting on the crane, while a safe value emitter determines safe conditions by means of a radius-measuring unit and a computer. When the value coincide, a comparator emits a signal stopping all crane motions increasing the moment, and partic. lifting. An electronic digital computer determines the safe values, while there is a distributor for all signals between the computer all processing units on the crane.