公开(公告)号：US3826380A

公开(公告)日：1974-07-30

申请号：US35062373

申请日：1973-04-12

Applicant: ASEA AB

Inventor： LENANDER B ,  LING B

IPC: B66C13/22 ,  B66C1/00 ,  B66C1/10 ,  B66C13/06 ,  B66C19/00

CPC classification number: B66C13/063

Abstract: To determine the deviation of the hoisting device of a crane from a vertical line, a light emitting arrangement is placed on the crane which emits a wide beam of light downwardly. Within this beam, the hook or other hoisting device has an upwardly directed reflector. There is also on the crane a detector unit which receives the light reflected from the reflector and emits a signal which indicates the deviation of the hoisting device from the vertical.

Abstract translation: 为了确定起重机的起重装置与垂直线的偏差，发光装置被放置在起重机上，其向下发射宽光束。 在该梁内，钩或其他提升装置具有向上指向的反射器。 在起重机上还有一个检测器单元，其接收从反射器反射的光并发出指示提升装置与垂直方向偏离的信号。