PASSIVE RAILROAD CROSSING WARNING SYSTEM

摘要

Docket Number: 46774CAN2A A passive railroad crossing warning device has two input optical windows that receive light from the headlight of an oncoming locomotive. The light is redirected to an output optical window where a combiner causes it to exit at an angle predetermined to make it visible to motorists approaching the railroad crossing. SWBAPP2(46774FOR.ABS) 02/19/92