Patent ID: 6051829
Filing Date: 2000-04-18
Classification: B66B

Abstract:
A safety system for detecting an obstruction in a hallway approaching a set of sliding doors moving along a threshold, said safety system comprising:a plurality of transmitters emitting a signal into said hallway at a preset range of angles with respect to said threshold, each of said plurality of transmitters having a light emitting device with a light emitting device centerline and a transmitter lens with a transmitter lens centerline, said transmitter lens centerline being offset from said light emitting device centerline to emit said signal from said light emitting device into said hallway at said preset range of angles; anda plurality of detectors receiving said signal reflected from said obstruction, each of said plurality of detectors having an optical device with an optical device centerline and a detector lens with a detector lens centerline, said detector lens centerline being offset from said optical device centerline to receive said signal reflected from said obstruction at said preset range of angles.