公开(公告)号：US5216246A

公开(公告)日：1993-06-01

申请号：US829835

申请日：1992-02-03

申请人： William T. Weldman ,  Khalid M. Rabb ,  Michael L. Shaffer ,  Karl M. Kau ,  Frederick N. Rath

发明人： William T. Weldman ,  Khalid M. Rabb ,  Michael L. Shaffer ,  Karl M. Kau ,  Frederick N. Rath

IPC分类号： B23Q11/08 ,  F16P3/14 ,  H03K17/968

CPC分类号： F16P3/14 ,  B23Q11/08 ,  F16P3/08 ,  F16P3/144 ,  H03K17/968

摘要： An interlock system for a machine cover including an optical sensor providing a cover open signal, a housing secured to the cover and defining a hollow cavity communicating with the optical path with the cover closed, a reflector fixed to one end of the cavity to reflect light to the sensor with the cover closed, a wall forming part of the housing and disposed in an interference relationship with the optical path for blocking light with the cover open, the length of the optical path with the cover open being less than the length of the optical path with the cover closed, and circuitry to trigger the optical sensor to provide light pulses at a predetermined frequency.

摘要翻译： 一种用于机器盖的互锁系统，包括提供盖打开信号的光学传感器，固定到盖子并且限定与盖子关闭时与光路连通的中空腔体的壳体;固定到空腔的一端以反射光的反射器的反射器 到盖子关闭的传感器，壁形成壳体的一部分并且与光路的干涉关系设置，用于在盖打开的情况下阻挡光，具有盖打开的光路的长度小于 封闭盖的光路，以及触发光学传感器以预定频率提供光脉冲的电路。