Patent ID: 6635862
Filing Date: 2003-10-21
Classification: G01V

Abstract:
A light curtain system comprising a plurality of transmitter segments and a plurality of receiver segments, the receiver segments operative to receive one or more light beams from corresponding ones of the transmitter segments; and wherein each plurality of segments comprises at least a first segment coupled to a second segment by a rigid connector, said rigid connector being one of a fixed-angle rigid connector or a rotatable-angle rigid connector, and a third segment coupled to one of the first and second segments by a flexible connector, said flexible connector being a flexible cable connector, such that each plurality of segments comprises a mix of rigidly and flexibly interconnected segments; and wherein the rigid connectors used in each plurality of light curtain segments are keyed for either transmitter use or receiver use to prevent misconnecting a transmitter segment to a receiver segment through a rigid connector.